Kristof Bajcsay

Lead Developer based in Paris, I help teams design, build, and scale modern web applications with high code quality and strong architecture. I specialize in JavaScript/TypeScript ecosystems and bring a pragmatic, product-driven approach to every project.

My expertise covers fullstack development, microservices, and microfrontends, with strong experience in Remix.js, React.js, Vite, Fastify, Node.js, PostgreSQL, Docker, CI/CD, and cloud-ready architectures. I can support you in building scalable APIs, secure authentication flows, shared frontends, and reliable distributed systems.

I’ve led engineering teams and delivered complex products end-to-end, so I can quickly understand your business needs, identify bottlenecks, and produce clean, maintainable solutions. Whether you need to bootstrap a new product, refactor an existing codebase, improve performance, or structure a solid technical foundation, I can help.

What I can deliver fast:

• Design & development of APIs (Fastify, Node, PostgreSQL)

• Implementation of authentication systems (Auth flows, JWT, OAuth, SSO)

• Setup of microservices + Docker environments

• Microfrontend architectures (React, Vite, Module Federation)

• Fullstack features with Remix.js

• Code audits, performance optimizations

• Mentoring, documentation, and technical strategy

Available evenings & weekends for short missions, quick fixes, prototypes, or ongoing support.

Let’s build something efficient, robust, and future-proof.