Full-Stack Developer

Promptwatch; Amsterdam; On-site; EUR 90,000 - 130,000; Full time

Job summary

Promptwatch, Amsterdam-based GEO startup, seeks engineers to own significant parts of our stack, architect distributed systems that process billions of prompts, and scale rapidly as we grow.

You will work with React 19 and Next.js, TypeScript, Node.js with Fastify, tRPC and REST endpoints, and job schedulers like SQS. The team uses Postgres with Prisma, Tailwind, and monorepo tooling to ship high-scale features.

Qualifications

• Requirements include React, Next.js, and strong TypeScript knowledge.
• Experience with Node.js and Fastify for API services.
• Familiarity with distributed systems and scalable architectures.

Responsibilities

• Develop and maintain large-scale frontend and backend features.
• Architect and optimize distributed jobs and data pipelines.
• Collaborate across cross-functional teams to ship reliable services.

Skills

React

Next.js

TypeScript

Node.js

Fastify

tRPC

REST

Distributed systems

Postgres

Prisma

Tailwind

Monorepo tooling

Jest/Vitest

Tools

PostgreSQL

Prisma ORM

Turborepo

Jest

Vitest

SQS

pgboss

Job description

Join the fastest-growing GEO startup tackling real technical challenges in AI search. You'll own significant parts of our stack, architecting distributed systems that run and analyze billions of prompts. We're scaling rapidly and need engineers who thrive on solving complex problems.

• React 19 and Next.js (pages router)
• Strong TypeScript knowledge
• Node with Fastify
• tRPC + traditional REST endpoints
• Event queues and job schedulers (SQS, pgboss, etc.)
• Postgres with Prisma or a comparable ORM
• Tailwind, Shadcn components
• Monorepo tooling (Turborepo, etc.)
• Jest or Vitest (or similar)