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Helion Market Research
Full Stack EngineerHelion Market Research • Antwerp, Flemish Region, Belgium
Full Stack Engineer

Full Stack Engineer

Helion Market Research • Antwerp, Flemish Region, Belgium
9 uur geleden
Functieomschrijving

We are hiring a Full Stack Developer

To apply, please send your CV and motivation letter to jobs@helionresearch.com



About the Company


Helion Research is a market research agency specialised in Mystery Shopping & Customer Experience Research, active in over 90 countries for multinational retailers, manufacturers and service providers. We are bringing more of our technology development in-house — and looking for a full-stack developer to help build it.


About the Role


You will join a small internal development team and work closely with our technical lead, management and business users. Because the team is small, you get real responsibility early: your own components, direct contact with the people who use what you build, and a say in technical decisions. You won't be expected to figure everything out alone.


Responsibilities


  • Build features across our TypeScript stack: React frontends (Vite, TailwindCSS, TanStack Query) and typed backends (Hono, tRPC, Drizzle on PostgreSQL)
  • Connect those applications to Helion systems, databases and external APIs
  • Build AI features into the product, such as LLM-supported grading and validation of research data
  • Help make AI-generated output reliable enough for production use
  • Take prototypes to production: testing (Vitest, Playwright), documentation, code quality
  • Try different technical approaches and measure what works


Qualifications


1 – 4 yrs experience — ideally


Required Skills


  • Good software-development fundamentals
  • Experience with full-stack, backend or web application development
  • Solid TypeScript — used across the entire stack
  • React
  • Databases and SQL (we run on PostgreSQL)
  • Building or integrating APIs
  • Git / GitHub
  • Able to read existing code and build reliable new functionality on top of it
  • Genuine interest in building with LLMs — work, side projects, studies or open source
  • Basic understanding of LLM applications: inference cost/time, and how RAG fits together
  • Comfortable working primarily from our Antwerp office


Preferred Skills


  • Bun, Vite, TailwindCSS, Hono, tRPC, Drizzle, Zod, TanStack Query
  • Cloudflare Workers or other serverless platforms
  • Testing with Vitest, Playwright or similar
  • Docker
  • Authentication, permissions & application security
  • PDF or image processing


Pay range and compensation package


Salary based on experience + extra-legal benefits

Office in city centre of Antwerp

2 days work from home

Full-time, permanent position, Antwerp, Belgium


Equal Opportunity Statement


We are committed to diversity and inclusivity in our hiring practices.


Apply: send CV + motivation to jobs@helionresearch.com


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