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Michaël MazurczakMM

Michaël Mazurczak

Senior Fullstack Developer

€550/day
Lyon, FR
8-15 years

Average response time: 1 hour

About Michaël

Je conçois et livre des systèmes en production, du backend complexe à l'interface utilisateur soignée.
Mon environnement technique : Node.js, TypeScript, React, React Native, Elixir, et Rust quand la performance l'exige. J'ai travaillé sur des plateformes fintech (intégration Mastercard, refactoring d'un système existant), des systèmes critiques (gestion d'inventaire pour sites nucléaires EDF), et des produits IoT connectés (du firmware ESP32 au cloud).
En 2024, j'ai fondé Hubfluencer — une plateforme de génération de vidéos marketing par IA, développée en solo de l'architecture au déploiement sur les stores.
Ce que j'apporte à vos projets :
→ Une expertise backend solide (APIs, workflows durables, bases de données)
→ Des interfaces React/React Native abouties
→ Une culture du test
→ Une capacité à structurer et faire monter en compétence une équipe
Je suis basé à Lyon et je travaille sans problèmes en remote. Disponible pour des missions de développement, d'architecture, ou de lead technique — que ce soit pour renforcer une équipe existante ou lancer un nouveau produit.
  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Lyon (up to 50km)

Experience

  • SASU Monocursive,
    Fullstack consultant
    SOFTWARE PUBLISHING
    December 2022 - Today (3 years and 6 months)
    Lyon, France
    Hubfluencer : Built and launched a generative AI platform for short-form marketing vi deos, from architecture to app store. Designed a durable agent pipeline handling async video generation workflows with real-time progress via WebSockets. Developed a custom rendering engine in Rust and FFmpeg to optimize output quality and processing speed. Shipped a cross-platform app (iOS/Android) with React Native. Achieved 90% test coverage with minimal mocking — tests run in parallel against isolated Postgres instances, enabling confident deployments.
    Elixir, Bun.js, Fly.io, ReactNative, Tailwind/NativeWind, TanStack Query, AI model fine-tuning, FFmpeg/Rust
    React Native Elixir PostgreSQL Agent IA Rust
  • EDF
    Senior backend developer
    ENERGY AND UTILITIES
    July 2024 - January 2025 (6 months)
    Lyon, France
    Delivered the backend for an inventory manage ment system used across nuclear facilities. Designed serverless workflows with AWS StepFunctions to orchestrate complex multi-step processes. Established testing stan dards that reduced regression issues and accelerated code review cycles. Node.js/TypeScript, AWS Lambda, StepFunctions, Terraform, PostgreSQL
    Node.js PostgreSQL Backend Service Development AWS AWS Lambda
  • Fintech Makers
    Lead Fullstack developer
    BANKING AND INSURANCE
    November 2023 - May 2024 (6 months)
    Oslo, Norway
    Led the Mastercard integration and guided the platform through a compliance audit for a German banking partner. Migrated a legacy Laravel monolith to a modern Node.js API with a React dashboard, improving maintainability and test coverage. Ensured PCI-DSS alignment throughout the architec ture. Query, Zustand, PostgreSQL
    Node.js React.js Backend Service Development PostgreSQL

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Education

  • Web projects management and design licence
    Jean Monnet University
    2012
    Web projects management and design licence

Skill set

Categories