Freelancer profile translated to English.

Description

Senior Backend Engineer & Tech Lead — ~10 years of experience on high-traffic products (fintech, social, government, telecom, audio tech).

I design and deliver robust back-end services, from architecture to production: Node.js, TypeScript, Go, NestJS on the back-end; PostgreSQL, MongoDB, Redis, Google Cloud Spanner for data; Docker, Kubernetes, CI/CD, GCP, AWS for infrastructure. I can also handle the front-end layer (React, React Native, Flutter) to deliver end-to-end when the context requires it.

My added value as a Tech Lead: Clean Architecture, Domain-Driven Design, Hexagonal Architecture, and TDD applied daily. I ensure the quality of your deliverables, lay down solid technical foundations that stand the test of time, and transfer best practices to your teams through pair programming and rigorous code reviews.

Some recent achievements:

- Ringover (€50M ARR, 12,000 clients) — Tech Lead Messaging on the real-time omnichannel hub (SMS, WhatsApp, Messenger, Instagram DM).

- Shelf / Koodos Labs (YC-backed) — Tech Lead Auth on the iOS/Android app.

- BeReal (70M users) — Chat Squad: refactoring of the messaging infrastructure in Go and Node.js on Google Cloud Spanner.

- beta.gouv (DINUM) — Full Stack Engineer & Tech Lead on a public service product.

- Django / La Banque Postale — Lead Developer on a TypeScript Clean Architecture / DDD monorepo, KYC, and open banking (Powens).

- Oney (bank) — Lead Software Craftsman on the Oney+ / BNPL app (TS, Node.js, NestJS, DDD, TDD).

Full remote / hybrid from Paris, clear and regular communication (FR/EN/HE). Available for missions of 3 months or more.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris (up to 50km)

Ringover
Tech Lead Messaging
TELECOMMUNICATIONS
July 2024 - Today (2 years and 1 month)
Paris, France
Tech Lead Messaging at Ringover — B2B unified communication platform (€50M+ ARR, 12,000 clients).

Design and production launch of the omnichannel messaging hub: SMS, WhatsApp Business, Facebook Messenger, Instagram DM. Hybrid architect/Lead Dev role on a real-time, high-traffic product.

Responsibilities: event-driven architecture design, technical choices (Node.js / TypeScript / NestJS), mentoring a team of 5 engineers, code reviews, defining quality standards (Clean Architecture, DDD, TDD, hexagonal architecture).

Stack: Node.js, TypeScript, NestJS, PostgreSQL, Redis, Kafka, Docker, Kubernetes, GCP, GraphQL.
Node.js NestJs TypeScript TDD Event-driven architecture
koodos labs
Tech Lead Authentication
July 2025 - March 2026 (8 months)
New York, United States
Tech Lead Authentication at Koodos Labs (Shelf) — social mobile app (New York, USA) that transforms cultural consumption into a living digital shelf.

Responsibilities:
· Technical lead for the entire Authentication & Identity pillar (Node.js, TypeScript, tRPC, Supabase, Kysely, PostgreSQL)
· Refactoring of the mobile login/signup flow (Capacitor iOS/Android): email, social auth, magic link, sessions
· Securing tRPC endpoints, token management, secret rotation, audit logs
· Multi-tenant architecture and fine-grained user permissions management
· Close collaboration with the NY product team to improve activation rates and reduce onboarding friction
· Mentoring the backend team on authentication best practices and application security

Stack: Node.js, TypeScript, tRPC, Supabase, Kysely, PostgreSQL, Capacitor, React 19, Next.js, Zustand, React Query, Vercel, AWS.
Node.js TypeScript Supabase
BeReal
Back-End Developer
SOCIAL NETWORKS
January 2024 - June 2024 (5 months)
Paris, France
Back-End Engineer at BeReal — complete refactoring of the messaging infrastructure for the social photo app (70M+ users). Back-end development in Go and Node.js on Google Cloud Spanner, orchestration via Argo Workflows. Occasional contributions on the mobile side in Swift (iOS) and Kotlin (Android). Stack: Golang, Node.js, TypeScript, Google Cloud Spanner, Argo, Swift, Kotlin, GCP.
Node.js Swift Kotlin Golang TypeScript