SNCF Voyageurs

Technical lead of an engineering team (5 developers, 2 BAs, 1 QA) on the SPID Program — digital transformation of the TGV maintenance lifecycle

Microservices architecture with NestJS on Kubernetes with inter-service communication via Kafka — full ownership of architectural decisions

Engineered a real-time event-driven MongoDB change detection system (Change Streams + centralized writes) — reduced inter-service sync to <200ms

Migrated Angular 13 → 21 adopting Signals and new control flow syntax — measured bundle size reduction and Core Web Vitals (LCP/INP) improvements in production

Reduced AWS Lambda cold starts by ~50% through targeted performance testing and provisioning optimization

Implemented CI/CD pipelines with GitHub Actions, high quality standards, and code review processes

Generative AI POC: explored predictive analysis of TGV maintenance time-slots to optimize operational scheduling quality

Project

Key Responsibilities