François-Xavier Hemmer

Full-Stack Development & Gaming Tools

Custom DayZ Launcher (WPF / C# .NET)

- Integrated Steam authentication

- Auto mods/updates management + integrity hash verification

- Modern interface, performance optimized

Player Data Synchronization

- Real-time app (skills, server logs)

- ProtoBuf + WebSocket for max performance

Headless Site + Back-Office

- Headless CMS architecture

- Fluid GSAP/CSS animations

- Intuitive content management

Next.js 14 APIs (My recent projects)

- Optimized REST/GraphQL APIs with Prisma

- NextAuth.js authentication, secure middleware

- Server Actions + Streaming for UX

Hosting & DevOps

- Vercel Pro (Next.js), Supabase (realtime DB)

- Full CI/CD GitHub Actions

- UptimeRobot + Sentry Monitoring

Tech Stack

C#/.NET • WPF • Next.js 14 • Prisma • PostgreSQL

Steam API • Twitch API • Discord Bot • Docker

E-commerce application with login and online purchase system. Implementation of route management by roles. Implementation of the shopping cart and order system. Conceptual (MCD) and relational database modeling.

RNCP Level 5 certified apprenticeship. Full-stack Next.js 14 / Prisma / React 18 development on real projects:

Mastered Tech Stack:

Full-Stack: Next.js 14 (App Router, Server Components, API Routes)

ORM / DB: Prisma 5 (schema, migrations, complex relations, PostgreSQL/MySQL)

Frontend: React 18 (Hooks, Context, Zustand), TailwindCSS, shadcn/ui

DevOps: Vercel deployment, GitHub Actions CI/CD, Prisma Studio

Concrete Projects Completed:

Real-time SaaS Dashboard (server stats, Recharts charts, WebSocket)

Next.js API with Prisma (NextAuth.js auth, optimized CRUD, RLS)

Responsive multi-tenant PWA (i18n, PPR, responsive-first)

Methodology: Pro GitFlow, Playwright/Cypress tests, code review, continuous deployment.

Result: Production-ready projects, 100% autonomy in modern React/Next.js/Prisma stack.