--- title: "Professional Skills - José DA COSTA" description: "**15 skills** refined over 26 years, between hands-on practice and formal education" locale: "en" canonical: "https://portfolio.josedacosta.net/en/skills" source: "https://portfolio.josedacosta.net/en/skills.md" html_source: "https://portfolio.josedacosta.net/en/skills" author: "José DA COSTA" type: "page" generated_at: "2026-06-02T15:37:07.388Z" --- # Professional Skills _My technical expertise_ **15 skills** refined over 26 years, between hands-on practice and formal education _Each skill was built across projects, teams and critical IS, as much as school benches and professional certifications._ Skills organized by domain: soft skills (human competencies) and hard skills (technical competencies) ## Key Numbers - Core skills: 10 (5 Soft Skills + 5 Hard Skills) - Average level: 8.1/10 ## 10 Featured skills ### Soft Skills (5) Human and behavioral competencies **Leadership & Team Management** (level 8/10 · Mastery) _**Soft** · Leadership & Management · 4.3/5 · Mastery_ _Lead engineering teams and shape culture_ Build a team that survives every contributor. 5 years at Pichet (Technical Lead to Engineering Manager on the ESB perimeter), CEO/CTO at ACCENSEO since 2024, active CTO Craft cohort. Keywords: team leadership, mentoring, recruiting, change management, cross-functional Acquired in : ACCENSEO, AdsPower, Celiane, Medialeads, Pichet, PSPO, SAFe, Smile, Master, MBA [Read Full Article](https://portfolio.josedacosta.net/en/skills/leadership-team-management.md) _Related achievements:_ - [Engineering Manager - Enterprise Integration Platform (alias ESB)](https://portfolio.josedacosta.net/en/achievements/engineering-manager-integration-entreprise.md) - Piloted a team of 1-7 developers (internal staff and contractors), full Agile ceremonies set up from scratch, coaching and Bus Factor prevention, 5 restructurings and 4 IT leadership changes absorbed while driving the iPaaS transformation vision, Structured inbound and outbound knowledge transfers, Confluence documentation became a department-wide replicable model. DORA-inspired metrics tracking, weekly 1:1 with every team member, annual reviews - [AI Chat Export - Multi-Platform AI Conversation Export Extension](https://portfolio.josedacosta.net/en/achievements/ai-chat-export.md) - Managed full product lifecycle as sole developer and product owner - [Atlassian Forge Developer - Intelligent IDE Plugin](https://portfolio.josedacosta.net/en/achievements/atlassian-forge-developer-ide-plugin.md) - Managed full product lifecycle as solo developer: architecture, implementation, testing, CI/CD, and Marketplace publication - [E-Commerce Site Generator with Customization CMS (alias MyEasyWeb)](https://portfolio.josedacosta.net/en/achievements/generateur-sites-ecommerce-avec-cms.md) - Led development as primary contributor (64.6% of commits) across full-stack SaaS platform - [AI Machine Learning SaaS Platform for Ad Optimization (alias AdsPower)](https://portfolio.josedacosta.net/en/achievements/plateforme-publicitaire-machine-learning.md) - Co-founded startup as CTO, managed a team of 4 freelancers for ML platform development **Strategic Vision & Technical Direction** (level 7/10 · Strong) _**Soft** · Strategy, Finance & Growth · 4.0/5 · Strong_ _Defend technical vision in executive committees_ CEO/Founder of ACCENSEO and Celiane plus MBA in Strategic Project Management. Defend technical vision in executive committees, link product, finance, and roadmap, and pilot SaaS B2B economics from pricing to ARR. Keywords: business strategy, design thinking, budget, data-driven decision, CTO mindset Acquired in : ACCENSEO, AdsPower, Auto-entrepreneur, Celiane, Pichet, Master, MBA [Read Full Article](https://portfolio.josedacosta.net/en/skills/strategic-vision-tech-direction.md) _Related achievements:_ - [Engineering Manager - Enterprise Integration Platform (alias ESB)](https://portfolio.josedacosta.net/en/achievements/engineering-manager-integration-entreprise.md) - ~370K EUR annual integration envelope, contract renegotiation (3-year rate locked), ~18K EUR/month infra OPEX **Project Piloting & Agile Methodologies** (level 8/10 · Mastery) _**Soft** · Project Management · 4.2/5 · Mastery_ _Frame, plan, and steer multi-team programs_ MBA Strategic Project Management plus PSPO and SAFe 5 certifications, backed by five years as Project Manager and Product Owner at Pichet. Frame, plan, and steer multi-team programs with risk control and stakeholder alignment. Keywords: Scrum, SAFe, PSPO, risk management, stakeholder management, OKR Acquired in : ACCENSEO, AdsPower, Auto-entrepreneur, Celiane, European Sourcing, Medialeads, Pichet, PSPO, SAFe, Smile, Master, MBA [Read Full Article](https://portfolio.josedacosta.net/en/skills/project-piloting-agile.md) _Related achievements:_ - [DAM Bynder - Project Manager for 1,400 Users](https://portfolio.josedacosta.net/en/achievements/dam-bynder-asset-management-project-manager.md) - Sole pilot of group-wide DAM deployment for ~1,400 employees - benchmark, vendor selection, contract negotiation, onboarding, go-live - Coordinated 10+ stakeholders (management, marketing, IT, legal for SLA & reversibility, vendor teams). Hybrid approach with sprint reviews, backlog grooming, and iterative deployment - applied pragmatically before PSPO certification obtained in 2021 - [Partner Lead Reception API Platform (alias PSR)](https://portfolio.josedacosta.net/en/achievements/plateforme-api-reception-leads-partenaires.md) - Single technical point of contact for dozens of external partners and internal teams, Project Manager / Product Owner of the platform from 2021 to 2023 - [Akeneo PIM Project Management and Product Information Governance](https://portfolio.josedacosta.net/en/achievements/pilotage-pim-akeneo-migration-saas.md) - Piloted PIM lifecycle over 5 years: version migration, pipeline automation, SaaS migration, and daily operations as Technical Lead then PO - Coordinated with 10+ stakeholders: DnD/Kariba agencies, Akeneo vendor, marketing teams, business leads, Claranet hosting - [Engineering Manager - Enterprise Integration Platform (alias ESB)](https://portfolio.josedacosta.net/en/achievements/engineering-manager-integration-entreprise.md) - Daily interactions with ~80 stakeholders across every business department of the group, steering committees, vendor relationships, Multi-project portfolio in parallel: ESB Enterprise Integration, PIM, DAM, PSR, Ligneurs. Created Daily ESB + Sprint Planning / Review / Retrospective for the middleware team (Nov 2022 - Feb 2023), Drove the 2022-2024 ESB roadmap, 903 days of workload planned, flow costing model built from scratch - Identified and mitigated 4 structural risks (infrastructure instability, knowledge concentration, alert fatigue, vendor lock-in) + blameless post-mortems - [ETL Pipeline for Real Estate Listing Syndication (alias Ligneurs)](https://portfolio.josedacosta.net/en/achievements/pipeline-etl-syndication-immobiliere.md) - Piloted the portal-by-portal migration over 4 years with standardized onboarding process, acceptance checklists and zero downtime, Coordinated business referents, external vendors and partner portals - go/no-go decisions and translation between technical and business constraints - [Trade Show Community Portal Platform](https://portfolio.josedacosta.net/en/achievements/portail-communautaire-salons-professionnels.md) - Managed digital project from WordPress setup to 7-year production lifecycle - [EuropeanTool - B2B Promotional Product Platform](https://portfolio.josedacosta.net/en/achievements/europeantool-plateforme-b2b.md) - Autonomously managed a 10-year technical project with 250+ suppliers and 50+ resellers - [Food Truck & Mobile Concept Platform - French manufacturer (alias MCR)](https://portfolio.josedacosta.net/en/achievements/plateforme-food-truck-concepts-mobiles.md) - Delivered the entire platform in 41 days solo - from voice-recording briefs to production, with client follow-up, prioritisation and scope control - [AI Machine Learning SaaS Platform for Ad Optimization (alias AdsPower)](https://portfolio.josedacosta.net/en/achievements/plateforme-publicitaire-machine-learning.md) - Led 3 major product iterations in under a year as Technical Project Manager **Problem Solving & Adaptability** (level 9/10 · Mastery) _**Soft** · Problem Solving & Adaptability · 4.3/5 · Mastery_ _Diagnose, learn fast, converge under pressure_ Six education cycles from BEP to MBA and 18 years across very different stacks. Top 1 and Top 2 competency frequencies in the portfolio: diagnose unfamiliar problems fast, learn what is needed, and converge under time pressure. Keywords: critical thinking, learning agility, troubleshooting, systems thinking Acquired in : ACCENSEO, AdsPower, Auto-entrepreneur, Celiane, European Sourcing, Medialeads, Pichet, PSPO, SAFe, Smile, BAC Pro, BEP, MBA [Read Full Article](https://portfolio.josedacosta.net/en/skills/problem-solving-adaptability.md) _Related achievements:_ - [Intelligent Accounting SaaS Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-comptabilite-saas.md) - PCG, CGI, Code de commerce, EDI Teledec, PSD2 and 2026-2027 e-invoicing preparation. Mastered French accounting domain, Open Banking PSD2, and EDI tax filing from scratch - [SaaS platform for mortgage credit brokers powered by AI](https://portfolio.josedacosta.net/en/achievements/plateforme-saas-courtiers-credit-immobilier.md) - Navigated complex French mortgage regulations (ORIAS, HCSF, usury rates) and SSO debugging challenges - Mastered mortgage brokerage domain, multi-provider AI integration, and WebAuthn authentication - [AI Chat Export - Multi-Platform AI Conversation Export Extension](https://portfolio.josedacosta.net/en/achievements/ai-chat-export.md) - Overcame DOM parsing challenges, anti-bot protections, and cross-origin iframe constraints - Mastered Manifest V3 extension architecture and multi-store publishing from scratch - [Gradient Generator - Advanced CSS Gradient Creation Tool](https://portfolio.josedacosta.net/en/achievements/gradient-generator-css.md) - Delivered 51K-line application in 3 days using AI-augmented development workflow - Complex state management with 8 stores, real-time gradient rendering, and browser compatibility challenges - [Atlassian Forge Developer - Intelligent IDE Plugin](https://portfolio.josedacosta.net/en/achievements/atlassian-forge-developer-ide-plugin.md) - Modeled complex proprietary Forge schema (83 scopes, 71 events, 155+ templates) in Kotlin for IDE autocompletion and validation. Mastered IntelliJ Platform SDK, Kotlin plugin development, and Atlassian Forge ecosystem from scratch in 3 months - [Trade Show Community Portal Platform](https://portfolio.josedacosta.net/en/achievements/portail-communautaire-salons-professionnels.md) - Managed Google Analytics, AdWords, and server administration alongside development. Created navigable client mockups demonstrating community portal concept for B2B prospects - [European B2B Search Engine for Promotional Products (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/moteur-de-recherche-europeen-b2b-objets-publicitaires.md) - Solved complex data integration challenges - heterogeneous supplier formats, multilingual search across 7 languages, massive catalog optimization where any poorly designed query was fatal for performance. Evolved from PHP custom + SVN monolith to Symfony microservices + Git + Elasticsearch + AngularJS SPA - continuously learned new stacks, frameworks and search technologies across 3 architectural phases - [EuropeanTool - B2B Promotional Product Platform](https://portfolio.josedacosta.net/en/achievements/europeantool-plateforme-b2b.md) - Evolved stack from procedural PHP to MVC frameworks, SVN to Git, manual to Docker-based deployment over 10 years - Designed queue systems with concurrency management, zombie detection, and automated export orchestration - [B2B Product Data Export Platform](https://portfolio.josedacosta.net/en/achievements/export-donnees-produits-b2b.md) - Designed zombie process detection, multi-level concurrency limits, and PrestaShop API error recovery mechanisms - Mastered PrestaShop WebService API (REST/XML) with undocumented behaviors and multi-shop support - [DAM Bynder - Project Manager for 1,400 Users](https://portfolio.josedacosta.net/en/achievements/dam-bynder-asset-management-project-manager.md) - Radical SaaS pivot after 5 previous failed attempts (360K€ wasted) and 6-step independent benchmark methodology - the cognitive anchor that turned failure into success - Mastered DAM ecosystem (Bynder, CI HUB, OpenText migration) and delivered despite Covid constraints - [Partner Lead Reception API Platform (alias PSR)](https://portfolio.josedacosta.net/en/achievements/plateforme-api-reception-leads-partenaires.md) - Diagnosed cross-system lead flow anomalies and complex partner-config migrations. Mastered Microsoft APIM and the real-estate lead management domain from scratch - [Akeneo PIM Project Management and Product Information Governance](https://portfolio.josedacosta.net/en/achievements/pilotage-pim-akeneo-migration-saas.md) - Designed G2P mediation system for automatic program reconciliation, resolved import pipeline issues, managed API migration risks - Mastered Akeneo PIM ecosystem from v1.4 through SaaS, learned real estate domain and multi-channel distribution requirements - [tailwindcss-obfuscator - Open Source CSS Obfuscation Tool](https://portfolio.josedacosta.net/en/achievements/tailwindcss-obfuscator.md) - Fast, self-directed ramp-up on 3 new technical domains (Babel AST, PostCSS, Rust/Oxide internals) to ship the package in 6 weeks, Chose static analysis over internal patching, solving the v4 compatibility challenge that blocked the competitor - [MagicPlaylist - Android Music Discovery & Playlist Generator](https://portfolio.josedacosta.net/en/achievements/magicplaylist-android-music-discovery.md) - Reverse-engineered unofficial Shazam API and solved rate limiting with progressive chunking and circuit breaker - Mastered Kotlin 2.0, Jetpack Compose, Material 3, Spotify OAuth 2.0, and Shazam API from scratch - [E-Commerce Platform Redesign Magento Enterprise Edition (alias Fleurance Nature)](https://portfolio.josedacosta.net/en/achievements/refonte-ecommerce-magento-fleurancenature.md) - Led solo a project scoped for a team, backported ElasticSearch to unsupported Magento EE 1.10 via autoloader rewrites, 7 spec iterations to uncover hidden business rules, Mastered ElasticSearch indexation and autocomplete on a Magento 1 context plus the 4x3 pricing complexity at Smile agency - [PIM Extranet for B2B Promotional Products Search Engine (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/extranet-pim-b2b-objets-publicitaires.md) - Modelled complex business rules (dynamic pricing, marking variants, multi-currency) - some suppliers reaching 15,000 variations per product - Picked up the project from SQLI in 2014, then drove the rewrite from custom MVC to Symfony 3.1 + PostgreSQL + RabbitMQ - [E-Commerce Site Generator with Customization CMS (alias MyEasyWeb)](https://portfolio.josedacosta.net/en/achievements/generateur-sites-ecommerce-avec-cms.md) - Mastered Solr/ElasticSearch search engines, B2B marketplace operations, and 520K+ product catalog with 7 languages and 32 currencies - Integrated heterogeneous supplier formats, multilingual search across 7 languages, massive catalog optimization - [AI Machine Learning SaaS Platform for Ad Optimization (alias AdsPower)](https://portfolio.josedacosta.net/en/achievements/plateforme-publicitaire-machine-learning.md) - Self-taught NLP, ML classification, and Azure ML Studio to build advertising intelligence platform. Designed search intent classification and bid optimization algorithms using TF-IDF and k-means clustering - [Multi-Supplier Product Data Import System](https://portfolio.josedacosta.net/en/achievements/import-european-sourcing.md) - Maintained and modernized a 12-year legacy system, transitioning from custom PHP to Symfony - [Food Truck & Mobile Concept Platform - French manufacturer (alias MCR)](https://portfolio.josedacosta.net/en/achievements/plateforme-food-truck-concepts-mobiles.md) - Pioneered AI-assisted development at production scale - x3 to x4 productivity multiplier sustained over 41 days, first full solo mobilisation of this workflow - [Centralized Multilingual Translation Management Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-gestion-traductions-multilingues.md) - Took over half-built project, replaced fragile custom PO parser with Gettext\Translations library - [Supplier Back-Office - B2B Self-Service Portal](https://portfolio.josedacosta.net/en/achievements/supplier-backoffice-european-sourcing.md) - Mastered AngularJS SPA patterns, CoffeeScript, WSSE auth, and B2B promotional product domain - [Collaborative Project Management Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-gestion-projets-collaboratif.md) - Implemented JWT auth flow, role-based permissions, database triggers for audit trail, and CORS integration - [ETL Pipeline for Real Estate Listing Syndication (alias Ligneurs)](https://portfolio.josedacosta.net/en/achievements/pipeline-etl-syndication-immobiliere.md) - Same-day pricing fixes, defensive patterns (circuit breaker, exponential backoff retry), unique per-partner constraints, structured logging for fast diagnosis - [Flux - Supplier Data Synchronization](https://portfolio.josedacosta.net/en/achievements/flux-synchronisation-fournisseurs.md) - Handled data quality and consistency across heterogeneous supplier data sources with error handling and retry logic **Pedagogy & Communication & Collaboration** (level 8/10 · Strong) _**Soft** · Communication & Collaboration · 3.6/5 · Strong_ _Train, transmit, run team rituals_ Run team rituals (monthly 1:1s, sprint reviews, blameless post-mortems), document to transmit (RFCs, versioned ADRs, runbooks, playbooks), train ACCENSEO apprentices from zero to fully autonomous in 3 months. Five years coordinating cross-functional teams at Pichet, CEO/CTO ACCENSEO since June 2024. Keywords: stakeholder management, TOEIC English, technical documentation, customer advisory Acquired in : ACCENSEO, Celiane, European Sourcing, Medialeads, GRSP Aquitaine, Pichet, PSPO, SAFe, Smile, TOEIC, BAC Pro, MC, BEP, BTS, Master, MBA [Read Full Article](https://portfolio.josedacosta.net/en/skills/communication-collaboration.md) _Related achievements:_ - [Trade Show Community Portal Platform](https://portfolio.josedacosta.net/en/achievements/portail-communautaire-salons-professionnels.md) - Collaborated with CEO, CTO, and Sales Director across European Sourcing ecosystem - [EuropeanTool - B2B Promotional Product Platform](https://portfolio.josedacosta.net/en/achievements/europeantool-plateforme-b2b.md) - Coordinated with suppliers, resellers, marketing team, and external partners across 7 European countries - [DAM Bynder - Project Manager for 1,400 Users](https://portfolio.josedacosta.net/en/achievements/dam-bynder-asset-management-project-manager.md) - Led 17 weekly onboarding sessions, user training, and transparent reporting to executive management - [Partner Lead Reception API Platform (alias PSR)](https://portfolio.josedacosta.net/en/achievements/plateforme-api-reception-leads-partenaires.md) - End-to-end API integration lifecycle with external partners: specs, testing, validation, go-live - [Akeneo PIM Project Management and Product Information Governance](https://portfolio.josedacosta.net/en/achievements/pilotage-pim-akeneo-migration-saas.md) - Managed knowledge transfer from predecessor, coordinated across development agencies, business teams, and vendor representatives - [E-Commerce Platform Redesign Magento Enterprise Edition (alias Fleurance Nature)](https://portfolio.josedacosta.net/en/achievements/refonte-ecommerce-magento-fleurancenature.md) - Weekly progress meetings, iterative client reviews across 7 spec versions (30 to 50 pages), coordination with Smile PM, spec author, client PO and external providers - [Engineering Manager - Enterprise Integration Platform (alias ESB)](https://portfolio.josedacosta.net/en/achievements/engineering-manager-integration-entreprise.md) - Translating between business languages (finance, hospitality, security), N+1/N+2 reporting, cross-team facilitation ### Hard Skills (5) Technical and professional competencies **Software & System Architecture** (level 9/10 · Mastery) _**Tech** · Architecture & Design · 4.2/5 · Mastery_ _Design production architectures end to end_ From PHP monoliths to cloud-native B2B SaaS platforms. 11 years of architectural practice, Master in Software Engineering, Lead Symfony and Lead Magento roles, now CTO at ACCENSEO. Keywords: system design, SOLID, DDD, REST API, UML, design patterns Acquired in : ACCENSEO, AdsPower, Celiane, European Sourcing, Medialeads, Pichet, Smile, Master [Read Full Article](https://portfolio.josedacosta.net/en/skills/system-architecture-design.md) _Related achievements:_ - [Intelligent Accounting SaaS Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-comptabilite-saas.md) - Feature-Driven architecture with 42 autonomous modules and 91 database models. 382 REST API routes with multi-role access control (6 profiles) and DGFIP v3.1 e-invoicing readiness - [European B2B Search Engine for Promotional Products (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/moteur-de-recherche-europeen-b2b-objets-publicitaires.md) - Decomposed the SQLI monolith into a microservices ecosystem (API, search, flux, translate, export, stats, supplierbo) with shared Symfony bundles (ESCoreBundle, ESSourcingBundle) and WSSE stateless inter-service authentication. Built a REST JSON API on Symfony 2.4 + Propel with WSSE stateless authentication (nonce + timestamp + digest), JMS Serializer, CORS, and multi-database connections (europeansourcing + tendanceobjet) - Applied microservices, MVC, SPA (AngularJS), Strategy pattern for 26+ heterogeneous supplier connectors (CSV/XML/API), and Doctrine behaviors (Sluggable, Sortable, Timestampable, Translatable, Blameable) - [Partner Lead Reception API Platform (alias PSR)](https://portfolio.josedacosta.net/en/achievements/plateforme-api-reception-leads-partenaires.md) - End-to-end architecture: API gateway, normalization, enrichment layer, CRM routing, Partner-facing REST endpoints, data contracts and 5 API versions - [E-Commerce Platform Redesign Magento Enterprise Edition (alias Fleurance Nature)](https://portfolio.josedacosta.net/en/achievements/refonte-ecommerce-magento-fleurancenature.md) - Multi-site architecture (3 storefronts), Solr to ElasticSearch migration with faceted search, ERP bidirectional flows redesign, 8-environment deployment topology - Magento XML rewrites pattern, MVC, Observer and Strategy patterns applied across 60+ modules without touching core code - [ETL Pipeline for Real Estate Listing Syndication (alias Ligneurs)](https://portfolio.josedacosta.net/en/achievements/pipeline-etl-syndication-immobiliere.md) - Designed the complete ETL architecture: modular per-partner pipeline, batch over real-time, centralized multi-format image pre-generation - Integrated PIM Akeneo v2 REST API for data extraction and several dozen partner endpoints (REST APIs and FTP/SFTP file drops) - [PIM Extranet for B2B Promotional Products Search Engine (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/extranet-pim-b2b-objets-publicitaires.md) - PIM/data model bigger than Akeneo: 32+ fields per variant, 36 per marking option, 50+ pricing grids, 97 MySQL tables on 15 GB, European Sourcing REST API consumed by the Supplier BO SPA and downstream services across 7 languages. Shared Symfony bundles (ESCoreBundle, ESSourcingBundle), 70+ Form Types, generic EntityList system, MVC + SPA + ETL - [Flux - Supplier Data Synchronization](https://portfolio.josedacosta.net/en/achievements/flux-synchronisation-fournisseurs.md) - Designed scalable ETL framework with multi-protocol integration (FTP, HTTP, REST) and connector pattern. Integrated diverse supplier APIs and data formats (CSV/XML/JSON) with automated daily synchronization - [E-Commerce Site Generator with Customization CMS (alias MyEasyWeb)](https://portfolio.josedacosta.net/en/achievements/generateur-sites-ecommerce-avec-cms.md) - Designed multi-tenant SaaS architecture serving 400+ branded reseller sites with domain-based detection, Built REST APIs on Symfony 2.4 (FOSRestBundle, JMSSerializer, WSSE) for cross-application synchronization - [SaaS platform for mortgage credit brokers powered by AI](https://portfolio.josedacosta.net/en/achievements/plateforme-saas-courtiers-credit-immobilier.md) - Designed monorepo architecture with 7 apps, 14 shared packages, and 98 database models - [AI Chat Export - Multi-Platform AI Conversation Export Extension](https://portfolio.josedacosta.net/en/achievements/ai-chat-export.md) - Architected modular extension with Strategy pattern and AbstractExtractor - [Gradient Generator - Advanced CSS Gradient Creation Tool](https://portfolio.josedacosta.net/en/achievements/gradient-generator-css.md) - Architected 8 interconnected Zustand stores, feature-driven component structure, and dual-storage backend - [Atlassian Forge Developer - Intelligent IDE Plugin](https://portfolio.josedacosta.net/en/achievements/atlassian-forge-developer-ide-plugin.md) - Designed modular plugin architecture with IntelliJ Platform SDK extension points, PSI tree manipulation, and schema-driven validation - [Multi-Supplier Product Data Import System](https://portfolio.josedacosta.net/en/achievements/import-european-sourcing.md) - Evolved from legacy PHP monolith to Symfony-based async import system with queue processing - [Food Truck & Mobile Concept Platform - French manufacturer (alias MCR)](https://portfolio.josedacosta.net/en/achievements/plateforme-food-truck-concepts-mobiles.md) - Designed the monolithic full-stack architecture: Next.js App Router + Payload CMS v3 + PostgreSQL, 15 collections, 24 content blocks - every structural decision owned end-to-end - [Centralized Multilingual Translation Management Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-gestion-traductions-multilingues.md) - Designed PO/MO file management system with MySQL catalog integration and multi-project synchronization - [tailwindcss-obfuscator - Open Source CSS Obfuscation Tool](https://portfolio.josedacosta.net/en/achievements/tailwindcss-obfuscator.md) - Designed modular pipeline architecture (extractors, transformers, plugins) supporting 10 frameworks and 4 bundlers - [Supplier Back-Office - B2B Self-Service Portal](https://portfolio.josedacosta.net/en/achievements/supplier-backoffice-european-sourcing.md) - Designed decoupled SPA architecture with 14 custom directives forming a reusable UI framework - [MagicPlaylist - Android Music Discovery & Playlist Generator](https://portfolio.josedacosta.net/en/achievements/magicplaylist-android-music-discovery.md) - Designed MVVM architecture with 5-strategy mapping pipeline, BFS expansion algorithm, and 3-level chunking - [Collaborative Project Management Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-gestion-projets-collaboratif.md) - Designed 3-tier SPA architecture with layered backend (Controller/Service/Repository), DTOs, and 7-table database with triggers - [Engineering Manager - Enterprise Integration Platform (alias ESB)](https://portfolio.josedacosta.net/en/achievements/engineering-manager-integration-entreprise.md) - Supervised the architecture of 100+ production flows across 20+ enterprise systems, iPaaS evaluation - [AI Machine Learning SaaS Platform for Ad Optimization (alias AdsPower)](https://portfolio.josedacosta.net/en/achievements/plateforme-publicitaire-machine-learning.md) - Integrated Google AdWords, Bing Ads, and Facebook Ads APIs for multi-platform campaign management **Fullstack Development** (level 9/10 · Mastery) _**Tech** · Software Development · 4.4/5 · Mastery_ _PHP, Java, TypeScript, React, Next.js polyglot_ 18 years of successive roles, each bringing its own stack. On Python (FastAPI, Flask), on modern TypeScript (Next.js, Prisma, Bun), on the JVM (Spring, Kotlin), and on PHP (Symfony, Magento, Joomla, Zend). Keep the posture of an operating CTO who codes, reviews, and arbitrates senior technical choices. Keywords: PHP, TypeScript, Node.js, React, Next.js, Java, Symfony, Magento Acquired in : ACCENSEO, AdsPower, Auto-entrepreneur, Celiane, European Sourcing, Medialeads, GRSP Aquitaine, Pichet, Smile, BTS, Master [Read Full Article](https://portfolio.josedacosta.net/en/skills/fullstack-development.md) _Related achievements:_ - [Intelligent Accounting SaaS Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-comptabilite-saas.md) - 234K-line SaaS platform: Next.js 16, React 19, TypeScript, 42 features, 382 API routes - [SaaS platform for mortgage credit brokers powered by AI](https://portfolio.josedacosta.net/en/achievements/plateforme-saas-courtiers-credit-immobilier.md) - Built 211K-line multi-app SaaS platform with Next.js 16, React 19, TypeScript 5.9, and Prisma 7 - [AI Chat Export - Multi-Platform AI Conversation Export Extension](https://portfolio.josedacosta.net/en/achievements/ai-chat-export.md) - Built complete browser extension with React 19, TypeScript strict mode, and Vite - [Gradient Generator - Advanced CSS Gradient Creation Tool](https://portfolio.josedacosta.net/en/achievements/gradient-generator-css.md) - Built complete SPA with Next.js 16, React 19, Zustand, Prisma 7, and OpenAI API integration - [Atlassian Forge Developer - Intelligent IDE Plugin](https://portfolio.josedacosta.net/en/achievements/atlassian-forge-developer-ide-plugin.md) - Developed 9,120 lines of Kotlin code for IntelliJ Platform plugin with JVM/Java 21 runtime, Gradle Kotlin DSL, and SnakeYAML/Gson integration - [Trade Show Community Portal Platform](https://portfolio.josedacosta.net/en/achievements/portail-communautaire-salons-professionnels.md) - Built WordPress corporate site with custom PHP, jQuery, and AJAX forms - [European B2B Search Engine for Promotional Products (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/moteur-de-recherche-europeen-b2b-objets-publicitaires.md) - Built 15+ interconnected sub-applications spanning PHP MVC custom, Symfony 2/3, AngularJS SPA, jQuery Mobile and PhoneGap/Cordova apps over 8 years - [EuropeanTool - B2B Promotional Product Platform](https://portfolio.josedacosta.net/en/achievements/europeantool-plateforme-b2b.md) - Built 30+ interconnected PHP applications covering the entire B2B supply chain over 10 years - [B2B Product Data Export Platform](https://portfolio.josedacosta.net/en/achievements/export-donnees-produits-b2b.md) - Built complete PHP MVC application with CLI batch processing, PrestaShop API integration, and concurrent export management - Developed end-to-end B2B export platform: Bootstrap/jQuery UI, PHP controllers, MySQL queries, CLI scripts, and API integration - [Multi-Supplier Product Data Import System](https://portfolio.josedacosta.net/en/achievements/import-european-sourcing.md) - Built complete PHP import pipeline processing 254+ supplier catalogs across 120+ database tables - [Food Truck & Mobile Concept Platform - French manufacturer (alias MCR)](https://portfolio.josedacosta.net/en/achievements/plateforme-food-truck-concepts-mobiles.md) - Shipped 129K lines across frontend, backend, admin, CMS extensions and AI tooling - 78 pages, 54 API endpoints, 133 database tables - [Centralized Multilingual Translation Management Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-gestion-traductions-multilingues.md) - Built complete Symfony 2 application with 3 controllers, 2 services, 15 routes, and inline AJAX editing - [tailwindcss-obfuscator - Open Source CSS Obfuscation Tool](https://portfolio.josedacosta.net/en/achievements/tailwindcss-obfuscator.md) - Built complete npm package with 25 TypeScript modules, 5 bundler plugins, and CLI using Babel AST and PostCSS - [Supplier Back-Office - B2B Self-Service Portal](https://portfolio.josedacosta.net/en/achievements/supplier-backoffice-european-sourcing.md) - Built complete 18K-line SPA with AngularJS, CoffeeScript, and Express.js consuming 35+ REST API endpoints - [MagicPlaylist - Android Music Discovery & Playlist Generator](https://portfolio.josedacosta.net/en/achievements/magicplaylist-android-music-discovery.md) - Built native Android app with Kotlin, Jetpack Compose, integrating Shazam and Spotify APIs end-to-end - [Collaborative Project Management Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-gestion-projets-collaboratif.md) - Built 30K-line full-stack application with Java 17/Spring Boot backend and Angular 20/TypeScript frontend - [E-Commerce Platform Redesign Magento Enterprise Edition (alias Fleurance Nature)](https://portfolio.josedacosta.net/en/achievements/refonte-ecommerce-magento-fleurancenature.md) - 60 custom Magento modules (1,040 PHP files), responsive theme across 3 storefronts, end-to-end ownership of backend + frontend - [ETL Pipeline for Real Estate Listing Syndication (alias Ligneurs)](https://portfolio.josedacosta.net/en/achievements/pipeline-etl-syndication-immobiliere.md) - Sole technical owner over 4 years: PHP/Symfony, Akeneo PIM v2 integration, image processing, format generators, monitoring tooling - [PIM Extranet for B2B Promotional Products Search Engine (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/extranet-pim-b2b-objets-publicitaires.md) - PHP custom MVC then Symfony 3.1, Doctrine ORM, RabbitMQ async messaging, MySQL then PostgreSQL over 5+ years. Owned 229K lines across the Extranet v1, v2 Rebirth and Supplier BO (AngularJS SPA), front-to-back ownership - [Flux - Supplier Data Synchronization](https://portfolio.josedacosta.net/en/achievements/flux-synchronisation-fournisseurs.md) - Built 37 connector classes for 30+ European suppliers handling 7 data formats across 8+ countries - [E-Commerce Site Generator with Customization CMS (alias MyEasyWeb)](https://portfolio.josedacosta.net/en/achievements/generateur-sites-ecommerce-avec-cms.md) - Led 108K LOC codebase across 3 interconnected apps with 1,506 commits over 4+ years - [AI Machine Learning SaaS Platform for Ad Optimization (alias AdsPower)](https://portfolio.josedacosta.net/en/achievements/plateforme-publicitaire-machine-learning.md) - Built full-stack platform with Symfony 3.2 backend, Angular 4/10 frontend, and ML pipelines **DevOps, Cloud & Production Industrialization** (level 8/10 · Mastery) _**Tech** · DevOps & Cloud · 4.1/5 · Mastery_ _CI/CD, observability, cloud production_ CI/CD pipelines, monitoring, and continuity at Pichet, Smile, and ACCENSEO. AWS plus OVH VPS Docker on the current infra. Industrialize delivery, observability, and incident response on production SaaS systems. Keywords: CI/CD, Docker, AWS, OVH, monitoring, Git workflows, testing strategy Acquired in : ACCENSEO, AdsPower, European Sourcing, Medialeads, GRSP Aquitaine, Pichet, Smile, BTS, Master [Read Full Article](https://portfolio.josedacosta.net/en/skills/devops-cloud-production.md) _Related achievements:_ - [SaaS platform for mortgage credit brokers powered by AI](https://portfolio.josedacosta.net/en/achievements/plateforme-saas-courtiers-credit-immobilier.md) - Terraform IaC with 3 environments, Docker Compose, Neon PostgreSQL, Upstash Redis, Cloudflare R2. 15 GitHub Actions workflows, Docker multi-service, Traefik reverse proxy, automated releases - [E-Commerce Platform Redesign Magento Enterprise Edition (alias Fleurance Nature)](https://portfolio.josedacosta.net/en/achievements/refonte-ecommerce-magento-fleurancenature.md) - 8-environment deployment pipeline (local to production) with Git tags, delta scripts, SCP transfer and Varnish cache preservation during live migration - Internal Smile testing + client acceptance testing (recette client) with formal PV sign-off, regression testing across 3 sites for each change - [PIM Extranet for B2B Promotional Products Search Engine (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/extranet-pim-b2b-objets-publicitaires.md) - PHPUnit test suite with 611 test files validating entities, controllers and business logic on the v2 Rebirth. OVH dedicated servers self-administered: Vagrant + Chef provisioning, 25+ cookbooks, Apache, security, monitoring, backups - [Intelligent Accounting SaaS Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-comptabilite-saas.md) - Docker Compose + PostgreSQL 16 + Open Banking PSD2 (Bridge, Qonto, GoCardless) - [AI Chat Export - Multi-Platform AI Conversation Export Extension](https://portfolio.josedacosta.net/en/achievements/ai-chat-export.md) - Designed automated CI/CD pipeline from commit to Chrome Web Store publication - [Atlassian Forge Developer - Intelligent IDE Plugin](https://portfolio.josedacosta.net/en/achievements/atlassian-forge-developer-ide-plugin.md) - 5 GitHub Actions workflows covering build, test, Qodana analysis, compatibility verification, and signed JetBrains Marketplace publication - [European B2B Search Engine for Promotional Products (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/moteur-de-recherche-europeen-b2b-objets-publicitaires.md) - Led the migration from SVN (398 revisions) to GitHub (13 repositories, 836 commits) - organization setup, per-developer branch strategy, 20+ private repos under the medialeads organization - [Partner Lead Reception API Platform (alias PSR)](https://portfolio.josedacosta.net/en/achievements/plateforme-api-reception-leads-partenaires.md) - SOFT Monitor dashboards, real-time email alerts, per-partner flow observability - [Akeneo PIM Project Management and Product Information Governance](https://portfolio.josedacosta.net/en/achievements/pilotage-pim-akeneo-migration-saas.md) - Managed migration from on-premise Kubernetes to Akeneo SaaS, designed rsync pipeline from internal ERP to AWS to PIM cloud - [Food Truck & Mobile Concept Platform - French manufacturer (alias MCR)](https://portfolio.josedacosta.net/en/achievements/plateforme-food-truck-concepts-mobiles.md) - Built an industrial-grade GitHub Actions pipeline (5 jobs), Terraform DNS for 6 domains, PM2 across 3 environments with safety confirmations before production - [tailwindcss-obfuscator - Open Source CSS Obfuscation Tool](https://portfolio.josedacosta.net/en/achievements/tailwindcss-obfuscator.md) - TurboRepo monorepo with pnpm workspaces, ESM/CJS/DTS exports via tsup, automated npm publication - [Collaborative Project Management Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-gestion-projets-collaboratif.md) - Set up Docker multi-stage builds, Docker Compose (dev + prod), GitHub Actions pipeline with 5 jobs, Docker Hub deployment - [ETL Pipeline for Real Estate Listing Syndication (alias Ligneurs)](https://portfolio.josedacosta.net/en/achievements/pipeline-etl-syndication-immobiliere.md) - Docker/Kubernetes deployment with GitLab CI per partner module, enabling zero-downtime migration from PIM v1.4 to v2 - [E-Commerce Site Generator with Customization CMS (alias MyEasyWeb)](https://portfolio.josedacosta.net/en/achievements/generateur-sites-ecommerce-avec-cms.md) - Led SVN to GitHub migration in 2016, OVH dedicated infrastructure, pre-CI/CD manual deployments **Data, AI & Machine Learning** (level 7/10 · Mastery) _**Tech** · Data & AI · 4.1/5 · Mastery_ _LLM, ML, data engineering, NoSQL, Dataviz_ RAG and LLM workflows at ACCENSEO, ML scoring at AdsPower, Ligneurs ETL at Pichet. A skill grown from real business needs, not from the hype cycle. Keywords: LLM, machine learning, data engineering, PostgreSQL, MongoDB, RAG Acquired in : ACCENSEO, AdsPower, Auto-entrepreneur, Celiane, European Sourcing, Medialeads, GRSP Aquitaine, Pichet, Smile, BTS, Master [Read Full Article](https://portfolio.josedacosta.net/en/skills/data-ai-machine-learning.md) _Related achievements:_ - [Multi-Supplier Product Data Import System](https://portfolio.josedacosta.net/en/achievements/import-european-sourcing.md) - Designed and operated multi-format ETL system (CSV/XML/FTP) with denormalization for search performance. Managed MySQL front/back architecture with ProxySQL, replication, and multilingual denormalized tables - [Intelligent Accounting SaaS Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-comptabilite-saas.md) - 91 Prisma models with complex relational schema: chart of accounts, journals, entries, bank reconciliation, FEC - [European B2B Search Engine for Promotional Products (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/moteur-de-recherche-europeen-b2b-objets-publicitaires.md) - Designed and optimized a 97-table MySQL schema with master-slave replication - SQL normal forms (1NF/2NF/3NF/BCNF), advanced indexing (B-tree, composite, covering), constant EXPLAIN plan analysis and progression to PostgreSQL full-text (tsvector/GIN) then Elasticsearch - [EuropeanTool - B2B Promotional Product Platform](https://portfolio.josedacosta.net/en/achievements/europeantool-plateforme-b2b.md) - Managed 15 GB MySQL database with 50+ tables, complex product catalog schemas, and export optimization - [B2B Product Data Export Platform](https://portfolio.josedacosta.net/en/achievements/export-donnees-produits-b2b.md) - Designed MySQL schema for export management with deadlock prevention, concurrent access control, and complex multi-table queries - [Food Truck & Mobile Concept Platform - French manufacturer (alias MCR)](https://portfolio.josedacosta.net/en/achievements/plateforme-food-truck-concepts-mobiles.md) - Shaped a 133-table PostgreSQL schema through Payload CMS collections and Drizzle ORM, including 46 versioning tables - [Centralized Multilingual Translation Management Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-gestion-traductions-multilingues.md) - Queried 7 MySQL translation tables via Doctrine DBAL with search, pagination and validation tracking - [E-Commerce Platform Redesign Magento Enterprise Edition (alias Fleurance Nature)](https://portfolio.josedacosta.net/en/achievements/refonte-ecommerce-magento-fleurancenature.md) - Magento EAV schema (6+ tables per product), MySQL, 4 customer groups x 3 websites pricing matrix (12 combinations with catalog + cart rules) - [ETL Pipeline for Real Estate Listing Syndication (alias Ligneurs)](https://portfolio.josedacosta.net/en/achievements/pipeline-etl-syndication-immobiliere.md) - End-to-end ETL pipeline from PIM Akeneo to several dozen portals: extraction, multi-format transformation (XML/CSV/JSON), FTP/SFTP delivery, monitoring - [PIM Extranet for B2B Promotional Products Search Engine (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/extranet-pim-b2b-objets-publicitaires.md) - MySQL then PostgreSQL with Doctrine, 6-step CSV import pipeline, 37 supplier connectors via FTP/HTTP/REST - [E-Commerce Site Generator with Customization CMS (alias MyEasyWeb)](https://portfolio.josedacosta.net/en/achievements/generateur-sites-ecommerce-avec-cms.md) - Managed 67 database entities with MySQL and Doctrine ORM across multi-tenant architecture **Application Security & Compliance** (level 8/10 · Solid) _**Tech** · Security · 3.0/5 · Solid_ _OWASP, network security, GDPR, IT contracts_ OWASP reflexes since the Zend years, network security from BTS, IT contract law and GDPR awareness from the Master and CTO roles. Read a security-sensitive contract and harden a SaaS shipping financial or personal data. Keywords: OWASP, network security, GDPR, IT contract law, compliance Acquired in : Celiane, European Sourcing, Medialeads, GRSP Aquitaine, Pichet, Smile, BTS, Master [Read Full Article](https://portfolio.josedacosta.net/en/skills/application-security-compliance.md) _Related achievements:_ - [Intelligent Accounting SaaS Platform](https://portfolio.josedacosta.net/en/achievements/plateforme-comptabilite-saas.md) - Competitor security audit (IDOR, KYC) feeding the platform's secure-by-design conception - [Partner Lead Reception API Platform (alias PSR)](https://portfolio.josedacosta.net/en/achievements/plateforme-api-reception-leads-partenaires.md) - APIM credential isolation, GDPR compliance and 2023 security audit ## 5 Complementary skills ### Soft Skills (1) **Innovation & Technology Watch** (level 8/10 · Solid) _**Soft** · Problem Solving & Adaptability · 2.6/5 · Solid_ _Continuous technical scouting and R&D_ Continuous tracking of AI tooling, JS frameworks, cloud platforms, and OSS. Distinct from Strategic Vision (product business idea generation): this one is the technical scouting that keeps my engineering choices on the right side of the curve. Keywords: technology watch, R&D, OSS, AI tooling, frameworks Acquired in : European Sourcing, Medialeads, Smile, BAC Pro, BTS [Read Full Article](https://portfolio.josedacosta.net/en/skills/innovation-tech-watch.md) ### Hard Skills (4) **SEO & Growth Hacking** (level 7/10 · Mastery) _**Tech** · Strategy, Finance & Growth · 5.0/5 · Mastery_ _SEO, SEM, SERP optimization for product growth_ Acquired as CTO Founder of Celiane where SEO sat at the heart of the business model. Cross-functional skill at the seam between marketing and tech, occasionally mobilized for B2C product acquisition. Keywords: SEO, SEM, SERP, growth hacking, organic acquisition Acquired in : Celiane [Read Full Article](https://portfolio.josedacosta.net/en/skills/seo-growth-hacking.md) **Reverse Engineering & Algorithms** (level 7/10 · Mastery) _**Tech** · Architecture & Design · 4.4/5 · Mastery_ _High-leverage card on pointed technical problems_ Roots at Master ESIEA (theoretical algorithmics) and Celiane (operational reverse engineering). Card to play on pointed technical challenges: search engines, optimizations, binary audits. Not a daily skill, a high-leverage one. Keywords: algorithms, complexity, reverse engineering, optimization Acquired in : Celiane, Master [Read Full Article](https://portfolio.josedacosta.net/en/skills/reverse-engineering-algorithms.md) _Related achievements:_ - [European B2B Search Engine for Promotional Products (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/moteur-de-recherche-europeen-b2b-objets-publicitaires.md) - Implemented combinatorial pricing algorithms (Cartesian product generating thousands of combinations per product: sizes × colors × quantities × marking types × marking zones × finishes) and search-engine indexing theory (inverted index, analyzers, TF-IDF scoring) - [PIM Extranet for B2B Promotional Products Search Engine (European Sourcing)](https://portfolio.josedacosta.net/en/achievements/extranet-pim-b2b-objets-publicitaires.md) - Cartesian-product pricing engine: thousands of combinations per product (sizes × colors × markings × zones × finishings) **UI Design & UX Design** (level 7/10 · Solid) _**Tech** · Software Development · 3.0/5 · Solid_ _Reason about UX upstream of the code_ Acquired at Master ESIEA. Kept out of the Fullstack pillar so it can be mentioned independently in product storytelling. Reason about UX upstream of the code: wireframes, journeys, and information architecture before the first React component. Keywords: UX design, wireframing, information architecture, usability Acquired in : Master [Read Full Article](https://portfolio.josedacosta.net/en/skills/ui-ux-design.md) **Tech & Field Versatility** (level 7/10 · Solid) _**Tech** · Infrastructure & Networks · 2.9/5 · Solid_ _Atypical field-to-CTO foundation_ Eleven competencies inherited from the pre-web track (BEP audiovisual to BTS IT). System administration, network design, asset management, support, electrotechnics, schematic reading, and specialized sales. Atypical field-to-CTO journey. Keywords: sysadmin, networks, IT support, electrotechnics, specialized sales, BEP, BTS Acquired in : ACCENSEO, Celiane, European Sourcing, Medialeads, GRSP Aquitaine, BAC Pro, MC, BEP, BTS [Read Full Article](https://portfolio.josedacosta.net/en/skills/tech-field-versatility.md) ## Skill categories Skills in this portfolio are grouped under the following categories for filtering and navigation: - Agile & Methodologies - Architecture & Design - Communication & Collaboration - Data & AI - DevOps & Cloud - Electronics - Infrastructure & Networks - Leadership & Management - Problem Solving & Adaptability - Project Management - Security - Software Development - Strategy, Finance & Growth ## Visual analytics (interactive charts on HTML page) - **Skills by Career Phase** - Average confidence levels per skill category across major career periods - **Skill Growth Over Time** - How skill categories have grown from 1997 to today, based on confidence levels across career milestones - **Comparative Analysis** - All skills compared to each other, showing relative levels and rankings - **Detailed Breakdown** - In-depth information about each skill with keywords and descriptions ## Coming Soon: Detailed Skill Articles Each skill will have a dedicated article with real-world examples, projects, and in-depth analysis. Stay tuned for comprehensive insights into each competency. Full interactive view with dashboards and comparative analysis: https://portfolio.josedacosta.net/en/skills