Paris · Remote-first · Taking new projects
MissionMind is a software engineering studio in Paris. Senior React, React Native and TypeScript work, embedded in your team — from the first pull request to the release that holds at scale.
What we do
Four things, done properly. Most engagements start with one and grow into the next.
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 stays pleasant at month twenty-four. Typed boundaries, tests that catch real regressions, CI that gives an answer 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, edge rendering, database access patterns, and the boring 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
Marketplaces, retail, health and AI — different domains, the same requirement: it has to work on the busiest day of the year.
Artificial intelligenceFrontend and product engineering on AI tooling — streaming interfaces, fast iteration, a design system that keeps up with the research.
MarketplaceFeature work on one of France's largest marketplaces, where every change ships to tens of millions of people.
Retail & e-commerceE-commerce and in-store digital experiences at retail scale, with the performance budget that traffic demands.
Digital healthTelemedicine product work where reliability and privacy are part of the spec, not an afterthought.
Why MissionMind
Most teams do not need more engineers. They need someone who has already shipped the thing they are about to build — who knows which shortcuts are safe, which abstractions age badly, and how to keep a release predictable while the roadmap keeps moving.
MissionMind is that person. Ten years of web and mobile products for French marketplaces, retailers, health platforms and AI companies, available as a freelance engagement rather than a headcount req. You get the work, the reasoning behind it, and a codebase your team can keep building on after the invoice is paid.
Senior, not supervised
No account manager, no rotating juniors, no handover deck. The person on the call is the person writing the code.
Small pull requests
Work arrives in changes small enough to read. That is what keeps quality high and surprises rare.
Leave it better
Tests, types and docs are part of the work, not the thing that gets cut when the deadline moves.
How it works
No discovery phase that bills for six weeks before anything runs. Four steps from first email to working software.
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 in 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.
Toolkit
Chosen because they hold up, not because they trended. If your team is already productive in something else, that matters more.
FAQ
Still unsure whether this is a fit? Ask directly — a short email gets a straight answer.
Fullstack web and mobile product engineering: building new 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 run from one to six months.
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.
React, React Native and TypeScript on the front, Node.js on the back, with PostgreSQL, GraphQL or REST, and deployment on Cloudflare or AWS. 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. Get in touch with your timeline and I will tell you honestly 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 you get the number in writing before anything starts.
Next step
A short email with your product, your timeline and what is currently in the way is enough. You will get a straight answer — including when the answer is that someone else is a better fit.