Full-Stack Developer

Are you a starter with a passion for code and AI? Helion Research in Antwerp is looking for a Full-Stack Developer — AI Products (Junior / Medior level, 1–4 years of experience ideally).

Why this is the ideal jumpstart for your career:

• Real impact from day one: You will join a small, internal development team. No corporate bureaucracy—you get real responsibility early on, a say in technical decisions, and your work will be live on real projects within weeks.
• Direct mentorship: You will work closely next to an experienced Technical Lead, allowing you to learn and grow incredibly fast.
• Cutting-edge AI experience: You won't just build basic web apps. You will implement actual AI features, such as LLM-supported data validation and RAG pipelines.
• Great work-life balance: A full-time, permanent position with flexible working hours and the option to work from home 2 days a week.

The Tech Stack (What you will use):

• Frontend: React, Vite, TailwindCSS, TanStack Query
• Backend & Database: TypeScript, Hono, tRPC, Drizzle, PostgreSQL
• AI Tooling: Hands-on experience with LLM APIs and tools like Claude Code, Cursor, or Copilot.

Who thrives in this role?

• You have solid software development fundamentals, specifically in TypeScript and React.
• You have a genuine interest in AI and understand the basics (like inference cost/time and how RAG fits together). Note: Training or fine-tuning models is not part of this job.
• You are a "builder" who prefers showing a working prototype over discussing theoretical solutions.
• You are comfortable working primarily from the office in Antwerp (located at Quellinstraat, right near the central station).

No long list of keywords on your CV? No problem!

Helion Research does not care about a CV packed with buzzwords. If you have built a cool project, an app, or an LLM experiment during your studies or in your free time, that is exactly we want to see!