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Full-stack developer (Freelance)

SpeakSoon

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Job Type   /   Job Level
Contract   /   Senior Executive
Job Location
Antwerp, Flemish Region, Belgium
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About the role

We're looking for a product-minded full-stack engineer to build and ship across our stack. You'll work closely with the founding team on features, integrations, and architecture. We want to move fast without breaking things.


What you'll work on

Building and shipping product features, integrations, and architecture decisions across our full stack. You'll work closely with the founding team on everything from the web dashboard to the WhatsApp assistant infrastructure.


What we're looking for


You're a fit if you:

  • Are fluent in TypeScript, Node.js, Nest.js, Next.js, and TailwindCSS
  • Have a strong eye for design and care about the product experience, not just the code
  • Can make sound architectural decisions and think in systems
  • Use AI-assisted tooling (Claude Code, Cursor) as a natural part of your workflow
  • Experienced working in fast-paced start-up environments where priorities shift daily, staying pragmatic and balancing quality with speed


A few things that'd make you stand out:

  • Have hands-on experience building LLM integrations like agents, chatbots and workflows
  • Familiarity with prompt engineering and evaluation
  • A base of UI/UX design skills and Figma experience.


What you can expect

Real ownership of what you ship; direct collaboration with both co-founders; flexible freelance setup; interesting technical problems at the intersection of product, AI and messaging; Start it @KBC ecosystem access.


Important notes!

  • This position is Hybrid. We expect you to be at our Antwerp office 2 days a week. We won't reply to fully remote applications.
  • Initially, this collaboration will start on a part-time basis.
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