Arthur Sallé

Arthur Sallé

Product Engineer · Fullstack TypeScript

Available

Hello 👋

I'm a freelance Product Engineer and I enjoy turning ideas into real products. Web apps, mobile apps, marketplaces or AI features, I can get involved from the earliest conversations and take a project all the way to production.

I mostly work across the TypeScript stack with React, Expo, tRPC and PostgreSQL. I enjoy understanding the business behind a project, making the right product and technical decisions, and then getting hands-on with the code to bring it to life.

Every day, Claude Code, Codex and other AI tools help me move faster, test more ideas and keep learning.

I can work independently or join an existing team. I'm based in Angers and can also work in Nantes, Paris or remotely.

Got something in mind? Let's talk 🙂

LinkedIn Malt GitHub CV

Stack

react
typescript
expo
tanstack
trpc
hono
drizzle
postgresql
neon
convex
railway
cloudflare
vite
astro
tailwind

Projects

Dropshot Coaching

Dropshot Coaching

Case study →

AI video coaching for tennis players
WeTennix

WeTennix

Case study →

Fantasy tennis game on web and mobile
Teamz Tennis

Teamz Tennis

Case study →

The marketplace connecting the tennis world
voilà eSIM

voilà eSIM

Case study →

Visual overhaul of the creator dashboard
Peer2Park

Peer2Park

Case study →

P2P parking marketplace in Dubai
Vigie

Vigie

Side project
Case study →

Native macOS menu-bar app for dev ports
Pepper

Pepper

Side project
Case study →

Telegram assistant for a shared Obsidian vault

How I work

I keep a close eye on how our tooling evolves and use AI code generation as leverage: shipping faster, and investing the time saved where it matters most, in the architecture, the product decisions and the business outcomes.

  1. 01
    Discovery

    Everything starts with workshops with the client. I dig into the business, build the domain vocabulary and prioritize what really matters.

  2. 02
    Spec & decisions

    I write a structured spec before any code, covering the scope and the documented product trade-offs, then break it down into Linear tickets. The product gets decided before it gets developed.

  3. 03
    Ship

    I move in short iterations all the way to production, with CI/CD and an early release. I'd rather have real feedback than frozen specs.

  4. 04
    Iterate

    Then I measure, listen to users and adjust. A shipped product is not a finished product.

Experiences

Product Engineer Freelance · UndefinedHQ
2024 - Present

I design and ship web and mobile products end-to-end: scoping, spec, development, production. Depending on the mission, I start from scratch or take over an existing product, on my own or within an existing team. I also work within UndefinedHQ, a collective of two developers and a designer: shared design work, peer code reviews, joint delivery.

Fullstack Developer Searocco Studio
2022 - 2023

Fullstack developer within a team of several developers, on existing codebases. That's where I built my working habits: code reviews, team processes, continuous delivery.

Get in touch

A project, an opportunity, or just want to talk? Book a slot, or send me an email.

Book a call