10+ yrs in consulting · Freelance · Lille, FR

I build web products that are fast, reliable & beautiful.

I'm Charles — full-stack JavaScript developer based in Lille. 10+ years delivering for clients in consulting (ESN) — banking & finance, retail/e-commerce, public sector and industry. I ship modern web apps from idea to production: clean UIs, solid APIs, no bloat.

View my work Let's talk →
  • 9+ Years of experience
  • 20+ Projects shipped
  • — Public repositories
  • ∞ Coffees per day

— Positioning

Builder, not just coder.

A decade of consulting taught me that shipping code isn't enough. I think product, care about the business outcome and long-term maintainability — the way a reliable team member does, not a solo hobbyist. The result: web apps that ship faster, scale cleaner, and feel right to use.

About

Engineering. Curiosity. Craft.

I'm a full-stack JavaScript developer based in Lille. For 10+ years I've worked in consulting (ESN), delivering web projects for a wide range of clients — from banking & finance to retail/e-commerce, public sector and industry. That means production-grade code, teamwork, deadlines and constraints — not just side projects.

I work with the following technologies on a daily basis

GitHub activity @Clamarque ↗
  • — Repositories
  • — Total stars
  • — Followers
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Don't hesitate to check out my work below.

Now

What I'm up to

Building

Shipping Badminton Manager — a web app to organize badminton sessions, players and matches, built with Next.js and TypeScript.

Learning

Deepening React Server Components, edge runtimes and AI-assisted developer workflows.

Exploring

Design systems, motion design, and accessible UI patterns — raising the bar on perceived quality.

Services

How I can help

Three ways we can work together. Every mission starts with a free discovery call to scope the right format.

MVP & product build

Take an idea from zero to a polished, shippable v1. Modern stack, clean architecture, real users in weeks — not months.

  • Architecture & tech choices
  • Frontend, API & database
  • Hosting & CI/CD
On request Let's talk →

Ongoing development

Most asked

Embedded as a senior full-stack developer in your team. Ship features, raise quality, mentor juniors when needed.

  • Feature delivery & reviews
  • Frontend & backend coverage
  • Async-friendly, remote-first
On request Let's talk →

Audit & refactor

Code review, performance & UX audit on an existing app, with a prioritized action plan. Optional implementation follow-up.

  • Architecture & code review
  • Performance & SEO checks
  • Written report & roadmap
On request Let's talk →

A selection of favorite projects — recently updated. Each one reflects my experience as a full-stack JavaScript developer over the past years, from frontend interfaces to backend architectures.

Work

Things I've built

See all my open-source projects
Experience

Journey so far

  1. Jun 2025 — Now Infogène · ESN · Lille

    Full-Stack Developer — consulting

    Current client mission through Infogène. Building and maintaining production web applications across the stack. Alongside client work, I build personal products (Badminton Manager, Hubmovies).

    TypeScript · React · Next.js · Node.js
  2. 2024 — 2025 Sully Group · ESN

    Full-Stack Developer — consulting

    Client delivery as a consultant: full-stack web development, shipping and maintaining features in production teams.

    TypeScript · React · Node.js · CI/CD
  3. 2017 — 2024 Ineat · ESN · Lille

    Full-Stack Developer — consulting (~7 yrs)

    Seven years of consulting across multiple client missions — banking & finance, retail/e-commerce, public sector and industry. Started front-end, then grew into full-stack ownership: frontend, API and hosting.

    JavaScript · Vue · Nuxt · React · Node.js
  4. 2016 — 2017 Sogeti (Capgemini) · ESN

    Front-End Developer — consulting

    First role out of engineering school, in consulting. Front-end web development on client projects.

    JavaScript · HTML · CSS · Front-end
  5. 2013 — 2016 EPSI · Lille

    Engineering degree, Computer Science

    Systems & networks, application development, databases and project management. Foundations that still guide how I build today.

    Java · ASP.NET · MySQL · Agile
Contact

Got a project in mind? Let's talk.

Freelance missions, product builds, technical audits — happy to discuss anything web. Usually reply within 24h.

clamarque.dev@gmail.com LinkedIn →

Based in Lille, FR · Working remotely across Europe