Senior Frontend Engineer @Cozynergy · 10+ years building and shipping fast custom web apps. Frontend is my home base (React, Next.js, TypeScript), but I work across the stack: at Cozynergy I also ship Node.js, PHP, and Python in production (RAG workflows, GraphQL APIs, real-time chat, SSO). Based in France.
I like interfaces that stay quick under real load, code that's still easy to read six months later, and side projects that solve a problem I actually have.
🌐 pierreguillemot.com · 💼 LinkedIn
Frontend :
Backend & tooling :
open-poker-planning: real-time planning poker for agile teams. No login, token-based rooms, live sync across everyone in the room. Built with the Next.js App Router and Convex.
FrameWatch: browser extension that overlays a minimal in-page HUD with live video playback quality metrics. WXT, React, TypeScript, Shadow DOM isolation, EN/FR.
macos-perf-audit: CLI that audits Apple Silicon Mac performance (CPU, memory, disk I/O, GPU power) and writes a structured JSON report with anomalies and optimization hints.
- Astro: fixed
waitUntilpropagation in the Cloudflare adapter's cache providers (astro#16187), shipped in [email protected], with the matching docs in withastro/docs#13744.
