Founder and Full-Stack Engineer

I'm Julien Renaux — I build scalable web applications and lead engineering teams, bridging the gap between product vision and technical execution. Between client missions I build and launch my own products. You can hire me on Toptal or connect on LinkedIn.

Startups I've founded

EVPick

An EV comparator and assistant. Ask it questions about electric cars and get grounded answers, powered by RAG over a real vehicle spec database, with live comparison tables instead of guesses.

React · TypeScript · Supabase · PostgreSQL

Thumb & Pylon

Tower defense meets idle clicker on a neon grid. Tap to charge, build to hold: a thirty-four level campaign across four acts, each level teaching exactly one new thing. Built with React Native Skia on a deterministic simulation core, so every run can be replayed and verified server-side for the leaderboards. Android now, iOS next.

React Native · Skia · TypeScript · PostgreSQL · Supabase

Frunk Friends

FrunkFriends is a niche social platform where Tesla owners share road trips, charging tips, upgrades, and vehicle moments with a verified, bot-free community. Users can post photos and videos, ask questions, join groups by location or vehicle model, and share live vehicle status data like battery level and tire pressure.

TypeScript · PostgreSQL · Supabase · Flutter · NextJS

FakeMRR

Real revenue takes time. Screenshots take seconds. Generate the viral MRR charts your startup deserves. Top 5 ProductHunt launch

NextJS · TypeScript · Firestore · Stripe

Writing

I've been writing about JavaScript, AI and shipping software since 2011. Read the blog.