Freelance Full-Stack Developer — shipping product to prod, not just code

You want to ship fast, without turning your codebase into a minefield.
I help you build (or take over) a web product end to end: front-end, back-end, database, deployment and monitoring.
Based in Lille, available remotely.

Please provide the French content block title to translate.

Former CTO • 15 years of development • accustomed to "full ownership" (product, tech, delivery)

What I do (full-stack, really)

I can work across the entire lifecycle: design, development, production deployment, ongoing improvements.

Front-end web

Next.js / React, clean UI, performance, accessibility, technical SEO.

Backend

Node.js and/or Ruby on Rails, REST/GraphQL APIs, authentication, permissions, webhooks.

Data

PostgreSQL/SQL, NoSQL, modeling, migrations, performance, indexing.

Infrastructure & delivery

Docker, CI/CD, environments, logs/monitoring, clean deployments.

Quality & maintainability

conventions, relevant tests, incremental refactoring, code review.

The 3 most common missions

Launch an MVP without shooting yourself in the foot

We focus on the essentials: simple stack, short iterations, tracking, and a healthy technical foundation.

Take over an existing project (and stabilize it)

I restore clarity: domain understanding, debt reduction, securing releases.

Accelerate a team (standards + execution)

I can be hands-on support, or frame the delivery: rules, CI/CD, "definition of done", code review, adding artificial intelligence tools.

My method (clear and no-nonsense)

1) Scoping

Objectives, constraints, risks, and success criteria.

2) Plan of attack

Breakdown into deliverables, priorities, and risk areas.

3) Continuous delivery

Small PRs, quick feedback, and visibility on progress.

4) Handover

Documentation, conventions, prioritized technical backlog: the project can be picked up again.

Stack & tools (I adapt, but I favor pragmatism)

  • Frontend : Next.js, React
  • Backend : Node.js, Ruby on Rails
  • Infrastructure : Docker, CI/CD
  • Bonus as needed : auth, payments, transactional emails, webhooks, analytics, monitoring

Who it's ideal for

Startup/SME that wants an autonomous developer capable of delivering to production.

Product that needs stability (bugs, performance, debt) before moving back to features.

Team that wants a senior hire with a vision "product + delivery".

FAQ

Do you do front-end or back-end?

Both. My interest is delivering a complete feature, with its data/infrastructure impacts.

Can you work "by feature"?

Yes, if we have a clear scope. Otherwise I suggest breaking it into batches (this avoids unpleasant surprises).

Do you also do DevOps?

I do "pragmatic DevOps": Docker, CI/CD, deployment, monitoring. If the infrastructure is very specific, I collaborate with your team/partner.

Can you take over a poorly documented project?

Yes. I start with a discovery phase (codebase + flows + risky areas) and I secure the releases.

Contact

Describe your context (idea/MVP/prod), your stack, and the expected outcome.

I'll quickly tell you whether it's relevant, and how I see the next steps.

Contact

Let's stay in touch

Feel free to contact me if you have any questions or if you'd like to collaborate on a project. I usually respond within 24 hours.

Location

France

Social media

Freelance Full-Stack Developer | Web, API, Cloud & Quality | DEMILY Clément