Senior Full Stack Developer

Promptwatch is the leading GEO platform, helping businesses optimize their visibility across ChatGPT, Claude, Perplexity, Google AI, Grok, and DeepSeek. We've analyzed 1.1B+ citations, clicks, and prompts, processing real-time data streams from billions of crawler logs and AI responses to synthesize insights that drive decisions for thousands of companies. Our stack spans multiple microservices (API server, AI gateway, ingest pipeline, log processing), backed by Postgres, Elasticsearch, Redis, and ClickHouse, all running on Google Cloud.

As a Full-Stack Developer, you'll own entire features from database schema to frontend UI. Ship code to production within hours, impacting thousands of businesses immediately. Work directly with the founding team to turn complex AI search data into intuitive user experiences. You'll have autonomy to define technical standards while solving real challenges: orchestrating millions of AI prompts daily, building reliable data pipelines, and creating interfaces that make massive datasets actionable. If you thrive on performance at scale and want to see immediate impact from your work, you'll fit right in.

• Owning features end-to-end across our TypeScript monorepo (React / Next.js, Fastify, Prisma, tRPC)
• Building and operating microservices: API server, AI gateway, ingest pipelines, log processing
• Designing data pipelines across Postgres, Elasticsearch, Redis, and ClickHouse (Tinybird)
• Managing Google Cloud infrastructure: Cloud Run, Pub/Sub, CI/CD, container builds, and cost monitoring
• Setting up observability with Sentry, PostHog, Pino logging, and custom dashboards
• Pairing with product and design to scope features and run user tests
• Driving code reviews and testing culture (Vitest, Playwright)
  

• React 19 and Next.js (pages router)
• Strong TypeScript knowledge
• Node with Fastify
• tRPC + traditional REST endpoints
• Job queues and async processing
• Postgres with Prisma or a comparable ORM
• Tailwind CSS with Radix UI / Shadcn components
• Monorepo tooling (Turborepo, pnpm workspaces)
• Vitest or similar testing framework
  

• Experience with Elasticsearch and/or ClickHouse
• Working with LLM APIs and AI SDKs (OpenAI, Anthropic, Google, etc.)
• Data visualization (Recharts, D3)
• Google Cloud Platform
  

Base salary: €80,000 - 110,000

Perks: Great office location, team off-sites, company sports activities

Do you see yourself thriving and growing in this role? Apply now and join us in shaping the future of AI Search.