Bastien Billey — Product & Full-Stack Engineer
I’m a senior product and full-stack engineer based in France, working fully remotely with European teams. I help small teams turn complicated products into interfaces and systems people can actually use.
How I work
I work best when I can follow a problem from the first conversation, through the interface, and into the implementation. The engagement can be permanent or bounded; the useful part is owning a meaningful piece of the outcome.
Ways to work together
Join the product team
A remote product or full-stack role where I can stay close to decisions and keep responsibility across the stack.
- small team with direct product context;
- real ownership rather than a fixed backlog;
- long enough horizon to improve the system, not just ship around it.
Own a focused build
A bounded contract for a product surface or system that needs both product judgment and hands-on implementation.
- a clear problem with a useful boundary;
- an interface, workflow, or real-time system to untangle;
- a handoff the team can confidently keep building on.
Experience and skills
Product engineering
Product discovery, scoping, UX flows, analytics, and design systems.
Frontend
React, TypeScript, Next.js, TanStack, and earlier Android work in Kotlin.
Backend & real-time
Node.js, NestJS, PostgreSQL, WebSockets, jobs, APIs, and external systems.
Product contexts
Experience across trading, multiplayer games, Web3, AI-assisted tools, and consumer products.
Where I can help
The product has a lot of state, edge cases, or external dependencies. The team is still shaping what to build. You want an engineer who asks why before deciding how and can move between frontend and backend without losing the thread.
Most of my current work is TypeScript, React, and Node. Earlier, I worked on Android and consumer mobile products; more recently, trading, Web3, multiplayer games, and AI-assisted tools.
Read the product engineer briefSelected work
Two recent products, including what shipped, what was difficult, and where the outcome fell short.