Available for new engagements
MissionMind is the studio of Alan Chauchet — ten years of React, TypeScript and Node.js inside product teams at Mistral AI, leboncoin, Carrefour, Aircall and the French government’s most-visited company directory.
preview → ci → production
What I do
Most engagements start with one of these and grow into the next. The mix gets decided during scoping, not sold as a package.
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.
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.
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 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.
Selected work
Public services, marketplaces, retail, health and AI. Different domains, one requirement: it has to work on the busiest day of the year.
DINUM — French Government
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.
10M+ visits a month
A retrieval-augmented web app that drafts RFI responses, built for a Mistral AI client.
A complete rebuild of the internal platform the advertising teams use to assemble landing pages.
Led the team on a data-visualisation platform used across the group and sold to external clients.
Four years leading the frontend of a telemedicine platform where reliability and privacy are part of the spec.
Four years, web and mobile
The web phone used by tens of thousands of professionals, and the event-sourced SMS feature behind it.
In numbers
The short version of a decade spent inside product teams, and the scale the work has had to survive.
Built in-house
Design, engineering, infrastructure and release — alone, under the same standards as the client work. It keeps the studio honest about what shipping actually costs.
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.
lifterly.comDestination, 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.
digimad.aiHow it works
No discovery phase that bills for six weeks before anything runs. Four steps, and working software in the first one.
Thirty minutes on what you are building, what is in the way, and whether I am the right person for it. No deck.
Scope, milestones, rate and start date on a single page. You know exactly what you are buying before anything is signed.
The first pull request lands in the first week. Small, reviewable changes from the start — no three-week silence.
Documentation, tests and a team that can keep going without me. The goal is to become unnecessary.
FAQ
Still unsure whether this is a fit? Ask directly — a short email gets a straight answer, including when the answer is no.
Fullstack web and mobile product engineering: building features in an existing product, standing up a new one, untangling a codebase that has become slow to change, or shipping AI features that need to work outside a demo. Engagements usually start somewhere between one and six months, and often run longer.
Most of the time, yes. A large part of the work is joining a team mid-flight: reading the code, shipping something small in the first week, and improving the parts that slow everyone down as I go. That is exactly what the leboncoin and Annuaire des Entreprises engagements were.
React, Next.js, React Native and TypeScript on the front, Node.js and NestJS on the back, with PostgreSQL, GraphQL or tRPC, deployed on Cloudflare, AWS or Google Cloud. The stack follows the problem — if your team is already productive in something else, that matters more than my preferences.
MissionMind is based in Paris and works with teams across France and Europe, remote-first. On-site days in Paris are easy to arrange for kickoffs, workshops and the weeks where being in the room helps.
Usually within two to four weeks, sometimes sooner for a short scoping engagement or an audit. Get in touch with your timeline and you will get an honest answer about whether it fits.
A daily rate for ongoing work, or a fixed price for a well-defined scope such as an audit or a first release. Either way the number is in writing before anything starts.
No — client engagements come first, and availability is always stated honestly before a contract. Lifterly and Digimad are what I do with the rest of the time, and running them alone is a large part of why I can tell you what a feature will cost to keep running, not just to build.
Next step
Your product, your timeline, and the part that is currently in the way. That is enough for a useful first reply — and you will get a straight answer, including when someone else is the better fit.