Julien Rahier · Freelance developer
Brussels · Available 2026
Freelance full-stack & mobile developer.
I design and build complete digital products, from booking platforms and SaaS dashboards to native iOS and Android apps. Brussels-based, working with founders and teams who want to ship.
11
Active projects
03
Platforms: iOS · Android · Web
06
Featured below
01 / About
Idea to running app, end to end.
I'm a freelance full-stack and mobile developer. Over the past years I've shipped a dozen products across web and native platforms, often single-handedly taking an idea from the first commit to a running app.
My work spans React and Next.js on the web, SwiftUI with The Composable Architecture on iOS, and Jetpack Compose on Android, backed by Firebase, Supabase and Cloud Functions. I care about clean architecture, real-time data, and interfaces that feel right.
Stack
- Swift · SwiftUI · TCA
- Kotlin · Jetpack Compose
- TypeScript
- React · Next.js
- Tailwind CSS
- Firebase · Supabase
- Node · Cloud Functions
- PostgreSQL
- AI APIs
02 / Selected work
Six things I've built.
01
Frénésie
Website and reservation platform for a cultural café opening in Brussels: menus, events and online bookings on a headless CMS.
React · TypeScript · Tailwind · Supabase · Directus
Platforms
Web ↗
02
StudioSauge
A studio-management and class-booking PWA for Pilates studios: scheduling, memberships and a Cloud Functions backend.
Next.js · TypeScript · Firebase
Platforms
Web ↗ · PWA
03
PouleParty
A location-based party game: one player is the Chicken, the others are Hunters, on a map that shrinks in real time.
SwiftUI · Kotlin · Next.js · Firebase
Platforms
iOS ↗ · Android · Web
04
Bubble
Organise outings and connect with friends through shared groups ('Bubbles') across three native platforms.
SwiftUI · TCA · Kotlin · Next.js · Firebase
Platforms
iOS · Android · Web
05
Unrolled
Swipe your camera roll clean: a fast, Tinder-style way to declutter thousands of photos at once.
SwiftUI · TCA · Kotlin · React
Platforms
iOS ↗ · Android · Web
06
Colocs Kitchen Race
Community dinners for Brussels cohouses: users are matched into rotating groups and climb a shared leaderboard.
SwiftUI · TCA · Kotlin · Next.js · Firebase
Platforms
iOS ↗ · Android · Web
03 / Contact
Let's build something together.
Have a product in mind, or need an extra pair of hands to ship it? Book a call or send a message. I usually reply within a day.
© 2026 Julien Rahier · Brussels, Belgium