# MissionMind

> The Paris studio of Alan Chauchet, a senior freelance fullstack engineer. Ten years of React, Next.js, React Native, TypeScript and Node.js inside product teams, available for engagements from one month to long-term, remote-first across Europe.

MissionMind is one engineer, not an agency: the person you speak to on the first call is the person who writes the code. Engagements run as a build sprint (2–6 weeks), an embedded engineer (3–6+ months, often longer) or a codebase audit (1 week). Contact: tech@missionmind.fr.

The site is published in English at the paths below and in French under `/fr`.

## Pages

- [Home](https://missionmind.fr/): Positioning, selected clients, services, numbers and FAQ
- [Services](https://missionmind.fr/services): The four areas of work, the three engagement shapes, and the stack
- [Work](https://missionmind.fr/work): Every engagement since 2016 with role, period, stack and what shipped
- [Products](https://missionmind.fr/products): Lifterly and Digimad — products designed, built and shipped in-house
- [About](https://missionmind.fr/about): Alan Chauchet: background, timeline, working principles and practical details
- [Contact](https://missionmind.fr/contact): How to start a project and what to put in the first email

## Services

- **Product engineering** — Ship the roadmap, not the backlog. Embedded in your team as a senior fullstack engineer, turning specs and Figma files into features your users actually get. Discovery, implementation, review, release.
- **Code quality & DX** — Make the fast path the safe path. A codebase that is still pleasant at month twenty-four. Typed boundaries, tests that catch real regressions, CI that answers in minutes, and review standards the whole team can hold.
- **Architecture & scale** — Built for the traffic you are about to get. Systems that hold under load and stay cheap to run. Caching, server and edge rendering, data-access patterns, and the unglamorous instrumentation that tells you what broke before your users do.
- **AI product engineering** — AI features that earn their place. LLM features built like the rest of the product: evaluated, cost-aware, and useful without a demo script. Streaming interfaces, tool calling, retrieval, and guardrails that survive real input.

## Clients

- **Annuaire des Entreprises** (DINUM — French Government) — Lead Fullstack Engineer, Oct 2025 — present. One of the most visited French government websites: the public record of every company in France. I led its migration from Next.js to TanStack Start.
- **Mistral AI** — Frontend Engineer, freelance, Sep — Oct 2025. A retrieval-augmented web app that drafts RFI responses, built for a Mistral AI client.
- **leboncoin** — Fullstack Engineer, Mar — Aug 2025. A complete rebuild of the internal platform the advertising teams use to assemble landing pages.
- **Carrefour** — Lead Fullstack Engineer, Aug 2024 — Apr 2025. Led the team on a data-visualisation platform used across the group and sold to external clients.
- **Qare** — Lead Frontend Engineer, Nov 2020 — Oct 2024. Four years leading the frontend of a telemedicine platform where reliability and privacy are part of the spec.
- **Aircall** — Software Engineer, Mar 2019 — Oct 2020. The web phone used by tens of thousands of professionals, and the event-sourced SMS feature behind it.
- **Dashlane** — Software Engineer, Oct 2018 — Feb 2019. Feature work and encryption performance on the React browser extension.
- **WeSave** — Frontend Developer, Dec 2017 — Sep 2018. Portfolio analysis with banking connectors, and a real-estate investment platform.
- **Henri 8** (Digital agency) — Fullstack Developer, Aug 2016 — Dec 2017. Sole developer at a healthcare-focused agency, shipping web and mobile projects for major industry players.

## Products

- [Lifterly](https://lifterly.com): The AI gym coach for iPhone and Apple Watch. A workout planner, set tracker and AI coach in one app. Lifterly builds a plan around your goals, your equipment and the time you actually have, then stays out of the way while you train.
- [Digimad](https://digimad.ai): Destination, visa and tax intelligence for people who work from anywhere. Real internet speeds, honest monthly budgets, the visa you actually qualify for and the tax day-count that decides whether you should still be there — down to the neighbourhood, with every figure traced back to its source.

## Optional

- [Privacy policy](https://missionmind.fr/privacy): Cookieless page-view analytics only; no cookies, no advertising
- [Terms of service](https://missionmind.fr/terms): Terms covering the website
- [French edition](https://missionmind.fr/fr): The same site in French