Younes K., Fullstack Developer in LyonWebsites and web apps, shipped end to end.

• For Swiss practices
• Hosted in Geneva, Switzerland
• Data kept in Switzerland and the EU

The work

• Technical lead of the product, from architecture to hosting: back end, front end, AI and deployment.
• The assistant answers a practice's clients on WhatsApp, books appointments into the practice calendar and texts back missed calls.
• Runs on Claude through AWS Bedrock, with model routing, per-request cost metering and a deterministic fallback.
• Back end on AdonisJS and PostgreSQL, front end on Next.js, shipped with Docker behind Caddy on a server in Geneva.

Stack

• Next.js
• AdonisJS
• PostgreSQL
• AWS Bedrock
• WhatsApp API (Meta)
• Docker
• Caddy

• 13 sites and apps in production
• A push goes live in about a minute

The work

• Web development company: custom websites and apps, designed and built for its clients.
• 13 websites and web apps shipped to production since 2025, including the rapper Ateyaba's official site.
• For an energy-transition CRM, the client got a clickable demo before signing: the eight steps of the sales journey, the dashboard, two build options compared side by side, and the detailed quote.
• K-DEV runs its own server for client projects such as ateyaba.shop. A push to GitHub puts the new version online in about a minute, and a failed build never replaces the one that's live.

Stack

• TypeScript
• Next.js
• React
• Node.js
• AdonisJS
• PostgreSQL
• Redis
• Docker
• Caddy

• Team of 3 to 5 developers
• Over €20M in yearly revenue
• Thousands of daily users

The work

• Led a team of 3 to 5 developers, coached through pairing and code reviews.
• With that team, ran the CRM (Angular, Node.js) and the field sales app (Next.js, AdonisJS), used every day by thousands of clients and employees.
• New multi-tenant platform (PostgreSQL, one schema per organization): the Activities module with calendar views and Google Calendar sync, plus a mobile version for field sales reps.
• YouSign e-signature: client and hiring contracts, contract templates, signed PDFs stored in the CRM.
• Energy-renovation cases on kanban boards: CEE subsidies, financing, installations, town-hall permits.
• CI/CD on GitHub Actions, feature flags, RBAC and alerting.
• Secrets management, structured logs and observability dashboards.

Stack

• Angular
• React
• Next.js
• TypeScript
• RxJS
• NgRx
• Node.js
• AdonisJS
• Express
• PostgreSQL
• MongoDB
• Redis
• KrakenD
• Docker
• GitHub Actions

The work

• Freelance mission in Lyon for MBen Dev, which helps its clients take their business online and handles a large share of their support functions.
• Digitalization projects for those clients on the MERN stack (MongoDB, Express, React, Node.js).
• Development of the React interfaces and the Node.js back ends.

Stack

• MongoDB
• Express
• React
• Node.js

The work

• BlazingBoost (Blazing Boost Srl, Milan) has sold coaching and play-along sessions since 2012, for more than 40 games, with over 40,000 customer reviews averaging 4.9. Its site says every pro it hires ranks in the top 2-3% of players.
• Two years coaching World of Warcraft players remotely: technique, tactics, and how to get better results in game.
• The coaching worked on confidence and determination as much as on technique.
• Every session was in English, with players from all over the world: two years of daily practice, and fluent English since.