Freelancer profile translated to English.

Description

Senior backend developer with 5+ years of experience, specializing in Rust and complex high-performance systems. An architect at heart, I design robust backends, well-structured microservices, and performance-oriented solutions.

After a Master's in Computer Science from the University of Lille, I honed my skills on technically demanding projects:

At Koddex (2025), I worked on the backend of an OS for hardware teams, using Rust and SQL. I led deep optimizations (queries reduced from 600ms to 20ms), designed a complete DSL with type inference (Hindley-Milner algorithm), and worked on a microservices architecture.
At Marigold (2022–2025), I contributed to the scalability of the Tezos blockchain: first on a sovereign blockchain project in OCaml, then on a Layer 2 sequencer in Rust for low-latency. I also spoke at Tez Dev 2023 as a speaker.
At Cutii (2019–2022), I started as a Software Engineer on robotics and embedded systems topics.

Main stack: Rust · SQL (CTEs, indexes, partitioning, EXPLAIN ANALYZE) · Actix · Microservices · OCaml · Blockchain (Tezos)

Curious, rigorous, and passionate about internals (Arch Linux, 1497 commits in the past year), I am comfortable with both greenfield projects and optimizing existing systems. Available for freelance missions in Rust backend development.

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Lille (up to 50km)

Koddex
Senior Rust Developer
TECH
May 2025 - Today (1 year and 3 months)
Lillers, France
Senior backend development mission at Koddex, a startup building an engineering OS for hardware teams: complex system modeling, automated traceability, design freeze management, and product certification.
The core of the product is a large data graph (think Obsidian, but shared globally between organizations), on which all business logic relies.
Worked exclusively on the backend in Rust and SQL within a team of 5 developers:
Performance optimization: queries reduced from 600ms to 20ms, some from several seconds to a few milliseconds via query plan analysis (EXPLAIN ANALYZE), indexing strategies, partitioning, and N+1 problem resolution.
Advanced SQL: recursive queries, CTEs, fine-tuning the database.
Rust architecture: Actix, error handling, backend design patterns on a microservices architecture.
Design of a complete DSL from scratch, involving the Hindley-Milner type inference algorithm (Algorithm W) and Pratt parsing for operator precedence management.
Rust DSL PostgreSQL Micro-services Observability
OneClickStudio
Rust Developer
TECH
February 2025 - May 2025 (3 months)
Paris, France
Rust developer position at OneClickStudio, a startup designing a turnkey system to transform any room into a professional production studio — podcasts, webinars, and corporate broadcasts.
Backend development: design of a studio management tool (equipment configuration, session management, monitoring) and implementation of a real-time communication service enabling the integration of remote participants into the production workflow.
Demanding technical environment: low latency, stream reliability, interactions with physical hardware.
WebRTC Rust Vue.js TanStack Query
Marigold
Blockchain Developer
TECH
April 2022 - November 2024 (2 years and 7 months)
Lille, France
Blockchain developer at Marigold, an R&D studio dedicated to the Tezos ecosystem. Two successive projects over three years:

2022 — Deku Project (OCaml): contribution to a sovereign blockchain aiming to scale Tezos. Work on consensus mechanisms, gossip networks, and the application layer in OCaml. Environment strongly constrained by determinism and state transition safety.
2023–2025 — Smart Rollup / Layer 2 (Rust): joined the Smart Rollup team to design a low-latency oriented Layer 2 sequencer in Rust. First steps in publishing technical posts and speaking at Tez Dev 2023.
Ocaml Rust Blockchain Smart Contract