Freelancer profile translated to English.

Description

I design and deliver production systems, from complex backends to polished user interfaces.

My technical environment: Node.js, TypeScript, React, React Native, Elixir, and Rust when performance demands it. I've worked on fintech platforms (Mastercard integration, refactoring an existing system), critical systems (inventory management for EDF nuclear sites), and connected IoT products (from ESP32 firmware to the cloud).

In 2024, I founded Hubfluencer — an AI-powered marketing video generation platform, developed solo from architecture to app store deployment.

What I bring to your projects:

→ Solid backend expertise (APIs, durable workflows, databases)

→ Polished React/React Native interfaces

→ A culture of testing

→ Ability to structure and upskill a team

I am based in Lyon and work seamlessly remotely. Available for development, architecture, or technical lead missions — whether to strengthen an existing team or launch a new product.

Languages

French
Native or bilingual
English
Native or bilingual

Workplace preferences

Can work on-site

Lyon (up to 50km)

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 videos, 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 AI Agent Rust
EDF
Senior backend developer
ENERGY AND UTILITIES
July 2024 - January 2025 (6 months)
Lyon, France
Delivered the backend for an inventory management system used across nuclear facilities. Designed serverless workflows with AWS StepFunctions to orchestrate complex multi-step processes. Established testing standards 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 architecture. Query, Zustand, PostgreSQL
Node.js React.js Backend Service Development PostgreSQL

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

Michaël Mazurczak

Senior Fullstack Developer

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