Full-Stack Developer (TypeScript, Node.js, PostgreSQL), long-term SaaS build
First seen by Alion on Nov 15, 2026.
TAP Agency is a Dutch AI automation agency. We build custom platforms and AI agents for small and mid-sized companies in the Netherlands.
We are starting a large build for one client: a multi-tenant operations platform for a Dutch service company, with sales, planning, a mobile app for field staff, a customer portal, HR, finance and AI agents. The build runs until mid-2027, followed by more platforms for the same client.
We are looking for a full-stack developer with a few years of real product experience who wants to grow with us. Our lead engineer sets the architecture and reviews your work; you build features end to end.
What you will do
Build on a PostgreSQL data model with organisations, roles and permissions, and row-level security.
Build features end to end in TypeScript: Next.js or React on the front, Node.js on the back.
Build integrations: Microsoft 365 calendars, export files for payroll and accounting, WhatsApp Business, digital signing.
Help build the mobile app for field staff (React Native or Expo).
Work in two-week sprints with a demo and a test session, with code review by our lead engineer.
What we ask
3+ years of commercial experience, of which at least 2 years with TypeScript, Node.js and PostgreSQL.
At least one product you helped build that runs in production with real users.
Good PostgreSQL: schema design, migrations, writing queries that stay fast.
Experience with authentication and role-based access.
You write tests and you document what you build.
English at B2 level or higher, and daily overlap with Central European Time (at least 09:00 to 14:00 CET).
Full-time availability.
Nice to have
Multi-tenant SaaS experience, Supabase, Expo, NestJS.
Experience with GDPR and handling personal data of employees.
Working with AI coding tools such as Claude Code in a disciplined way.
What we offer
A full-time (or parttime, but at least 20 hours per week) remote contract for the length of the build, with more work for the same client after that.
A paid test task of one to two days, then two paid weeks of working together before we both decide.
Direct contact with the founders, code review by an experienced lead engineer, and room to grow into more responsibility.