Professional Summary
Work Experience
Education & Certifications
Technical skills
Europe/Paris
French
English

Lucas Negro Castro

Head of Technology

Head of Technology with 10 years of experience in PHP/Laravel/Symfony, Next.js and AWS/GCP cloud.
I combine technical leadership, engineering management, and hands-on development to deliver business value and reliable software.

Passionate about clean architecture, code quality, and innovation, I mentor developers, manage squads of 3-6 people, and implement processes that improve delivery, team growth, and product impact.

Work Experience

Réassurez-moiJanuary 2026 - Present
Head of Technology
  • Built a loan offer extraction tool for automated borrower insurance pricing using Mistral OCR + Claude Sonnet 4.6: reduced form completion time from 5 min to 30 sec, with significant improvements in reliability and accuracy for advisors.
  • Built a Réassurez-moi MCP enabling best borrower insurance offer pricing directly from a LLM.
  • Created a public Custom GPT App allowing users to get the best borrower insurance offers pricing from ChatGPT.
GlobalExam2020 - 2025
Tech Lead
  • Built a live classroom platform with SSO and Stripe/PayPal integration, increasing user engagement by +25%.
  • Managed a squad of up to 6 developers, implementing OKRs, performance reviews, mentoring, and technical workshops to align the team with strategic goals.
  • Optimized AWS infrastructure (Serverless, EC2, S3, SQS, CI/CD, FinOps), reducing cloud costs by 20%.
  • Improved code quality via PHPMetrics, Refactoring Committee, Clean Architecture, and DORA metrics to enhance delivery and maintainability.
  • Developed optimized mass exports using SQL and asynchronous AWS SQS jobs, reducing processing time ×3.
  • Migrated MySQL backend to SingleStore and implemented real-time ETL pipelines, improving performance ×5.
  • Built B2B dashboards for contracts, licenses, and statistics, reducing support requests by 40% and increasing client autonomy.
Classroom project
Admin portal
Veolia Recycling & Waste Management2017 - 2020
Developer Fullstack
  • Recruited and mentored a backend developer, accelerating ramp-up and autonomy on critical projects.
  • Developed B2B client portal (Laravel/Vue.js) with modules for billing, documents, geolocation, IoT tracking, and analytics, reducing support requests by 35%.
  • Optimized performance using Elasticsearch (search time from 5s → 200ms), Redis (-40% DB load), and CI/CD Jenkins pipelines (deployment time ×2 faster).
  • Implemented secure document management with AWS S3 ensuring 99.99% availability.
CPAM de Paris2015 - 2017
Developer Fullstack
  • Designed a full-stack web app (PHP/JS) to compare and synchronize multiple databases, reducing data inconsistency errors by 40%.
  • Developed a web platform for Assurance Maladie to manage and distribute marketing campaigns, improving reach by +25%.

Education & Certifications

GlobalExamTeam Management Training (2024)
SUPINFOEngineering Degree in Computer Science (2017)
Université Pierre & Marie Curie (Paris VI)3rd Year Bachelor's Degree in Applications Development & New Technologies (2015)

Technical skills

BackendCore expertise: robust architectures and high-performance APIs.
FrontendModern, reactive, and accessible interfaces.
Cloud & DevOpsScalable infrastructure, CI/CD and FinOps.
Data & AIAI pipelines, OCR and LLM integrations in production.