About Nicolas
Senior software engineer with 10+ years building mobile and web products across the full stack — from greenfield apps to production systems used daily in the field.
My core expertise is React Native and TypeScript, but I operate at the system level: architecture decisions, CI/CD pipelines, design systems, store deployments, team onboarding. I've led mobile products end-to-end as the sole engineer, and scaled them by growing and mentoring the team around me.
Recent work includes bootstrapping Tennaxia Déchets — a B2B EHS mobile app integrated with the French government's Trackdéchets platform — from zero to production in under a year, while introducing React and modern frontend practices to a backend-heavy team.
Open to:
- Staff or Lead Mobile Engineer roles in product companies
- Founding engineer positions in early-stage startups
- Freelance contracts (React Native, full-stack mobile/web)
📍 Currently Lyon, France
Portfolio & side projects: nozil.dev
French
Native or bilingual
English
Fluent
Can work on-site
Lyon (up to 20km)
Experience
- TennaxiaLead Mobile EngineerDecember 2024 - Today (1 year and 7 months)Lyon, FranceJoined as the sole mobile engineer to start Tennaxia's mobile team from scratch — hired to bootstrap Tennaxia Déchets, a B2B companion app for EHS field agents that digitizes waste tracing slips (BSD) and integrates with Trackdéchets, the French government's waste traceability platform (beta.gouv.fr). Shipped from zero to production in under a year. The mobile team has since grown to ~3.5 people.Designed the full mobile architecture: React Native + Expo, offline capabilities via TanStack Query cache, Auth0 (co-led the company-wide migration), custom design system built from scratch inspired by shadcn, monorepo structure to share UI across mobile and webSole engineer for the first phase, then onboarded and led 2 mid-junior devs + 1 senior for API ownershipShipped to production: ~20 client companies, ~30 sites, ~30 field agents — currently in paid betaExpanded scope to lead the webapp restyling: migrating highest-traffic screens from server-rendered Java to React SPA, within a Turborepo monorepo with shared components across the full EHS suiteDriving adoption of OpenAPI spec on the backend (no spec currently — pushing for it)Stack: React Native, Expo, React, TypeScript, TanStack Query, Tailwind, Auth0, REST, Turborepo
- CVDesignRMobile EngineerJanuary 2024 - May 2024 (4 months)Part of wedoproduct, a product studio I co-ran with a business associate.5-month engagement to build TalentPicker — a recruiter-facing mobile app for CVDesignR's CV bank platform, letting recruiters search, shortlist, and contact candidates.- Built the full app from scratch: auth flow, webview navigation, push notifications and deep links via Brevo- Set up CI/CD pipelines with OTA updates and automated App Store and Google Play submissions- Delivered end-to-end: from scoping and quotation to production releaseStack: React Native, Expo, TypeScript
- C+NETLead Mobile EngineerMay 2022 - April 2026 (3 years and 11 months)Part of wedoproduct, a product studio I co-ran with a business associate. We won this contract, recruited a freelance developer, and I held full technical ownership of the Android field app throughout.Built C+NET's waste management mobile product from scratch — a field app for agents handling waste collection, sorting, and processing. Delivered features continuously over 4 years, most recently adding guided onboarding tours for new agents.- Built the Android app from scratch with offline capabilities (agents operate in low-connectivity environments)- QR code scanning for real-time data exchange between agents and the platform- MDM/EMM fleet management for deploying and maintaining company-owned devices in the fieldStack: React Native, Expo, TypeScript, GraphQL
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Education
- Ingénieur, InformatiquePolytech'Lyon2014L'objectif de la formation est de former des ingénieur·e·s généralistes en informatique pour concevoir et réaliser des systèmes d'information pour l'entreprise et l'industrie. Les points forts de la spécialité: • Ouverture à la recherche: - Intelligence artificielle système multi-agents - Informatique Décisionnelle & Big Data • Professionalisation: - Projet de 8 semaines Business - Projet de 13 semaines en Conception développement informatique
- DUT InformatiqueIUT Lyon 12011L’objectif général du DUT est de former des professionnel·le·s capables de travailler en équipe et connaissant le fonctionnement de l’entreprise. Les enseignements visent à : • Maîtriser des compétences fondamentales en informatique (développement d’applications, web, bases de données, réseaux, …) • Développer des compétences générales (mathématiques, fonctionnement de l’entreprise, communication, anglais) • S’investir dans des projets en équipe (potentiellement à destination d’associations et d’entreprises).