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 and games through my product studio, TrendingDevs. You can hire me on Toptal or connect on LinkedIn.

Startups I've founded

Token Clicker

An idle clicker game about the AI boom, free in any browser and in seven languages. Click The Prompt, build a fleet of machines from a single desktop up to a Dyson Swarm, catch Golden Tokens and survive the AI-pocalypse. An homage to Cookie Clicker.

TypeScript · Vite · HTML Canvas · Vitest · Playwright · Remotion

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. Live now on iOS and Android.

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.

Entrepreneur

Products I've launched

Built end to end: product, engineering, design, launch and support. All three are live today and run by my product studio, TrendingDevs.

EVPick

New

Web app · Live

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

Frunk Friends

iOS & Android app · Live

A niche social platform where Tesla owners share road trips, charging tips, upgrades and vehicle moments with a verified, bot-free community.

  • TypeScript
  • PostgreSQL
  • Supabase
  • Flutter
  • NextJS

FakeMRR

Top 5 on Product Hunt

Web app · Live

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

  • NextJS
  • TypeScript
  • Firestore
  • Stripe
Game Designer

Games I've built

Designed, coded and shipped solo, from the simulation core to the launch trailer, and published by my product studio, TrendingDevs.

Token Clicker

New

Idle clicker · Web · Free to play

An idle clicker about the AI boom that plays in any browser, in seven languages. Click The Prompt, spend the tokens on machines from a single desktop up to a Dyson Swarm, catch Golden Tokens, dodge Hallucinations and try not to trigger the AI-pocalypse. An homage to Cookie Clicker, built on a headless engine so a simulator can play two weeks of the game in a second to tune the pacing.

  • TypeScript
  • Vite
  • HTML Canvas
  • Vitest
  • Playwright
  • Remotion

Thumb & Pylon

Tower defense · iOS & Android · Live

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.

  • React Native
  • Skia
  • TypeScript
  • PostgreSQL
  • Supabase