EMERIC GUYON — Senior fullstack developer — I help startups and tech teams build the right thing, and build it right.
Product-minded developer. I don't just write code — I help you ship the right thing.
Freelance fullstack developer with 10+ years of experience. I've worked with startups, scale-ups and large organizations — from MVP to production, from a single feature to a full platform.
I think product before component. I challenge specs, question priorities, and chase ROI. When I join a team, I understand the "why" before I code the "how". That's how I avoid building the wrong thing.
React, Next.js, Vue.js, Nuxt, TypeScript, Node.js, Symfony — and custom WordPress when it's the right fit. AI is part of my daily workflow: it speeds up delivery, I ensure quality.
MyRole, INRIA, Lönn, Elite Trackr
Patriarche, Ekkinox, 25 lieux d'innovation
EvianChezVous, Mieux Voir, NutriciaStore
My Evian, Chocolat De Neuville, Mieux Voir, Bragard
What I can do for you.
Build something new
Web apps, SaaS platforms, business tools — from technical scoping to deployment. I build products designed to last, not just to ship.
Fix or modernize what you have
Stack modernization, framework migration, legacy refactoring — I take over existing code and evolve it without breaking things.
Make it faster and more visible
Audit, Core Web Vitals optimization, SSR, lazy loading — measurable gains in speed and search rankings.
Get the architecture right
Stack selection, technical architecture, code review — I step in upstream to lay the right foundations before a line of code is written.
Add AI where it actually helps
AI API integration (OpenAI, Claude, etc.), automated workflows, smart features — AI serving your product, not the other way around.
Reinforce your team
I embed in your sprints, your processes, your tools. Solo or paired, I adapt to your pace and your standards. Operational from day one.
The right tools for every project, tailored to your technical needs.
Every project taught me something.
Here are a few.
EliteTrackr
The Wikipedia of athletics. 800K athletes, 14M performances, 230 countries, 9 languages.
Ekkinox
Construction-site financial tracking tool — internal at Patriarche, then white-labeled.
25 Lieux Innovation
Evianchezvous
Lonn
B2B SaaS for wellness centers: staff scheduling and appointment booking.
Juriscan
ParentsDouceur
MALT : Malloc Tracker (Inria)
Memory profiling tool to track malloc allocations.
Uplexa
Other projects I've worked on.
Tell me about your project — I'll be straight with you about whether I can help.
Senior fullstack developer — I help startups and tech teams build the right thing, and build it right.
Based in France — fully remote or on-site depending on the project. Lyon, Grenoble, Annecy, Paris…