Backend Engineer

Stack

Responsibilities

• ▹Design API-first services, data models and system boundaries
• ▹Ship features end to end, from the user problem through backend and data model to the UI and production
• ▹Build product features with LLM APIs and agentic components, using tool calling, evals, error handling and monitoring
• ▹Run systems reliably with testing, CI/CD and observability
• ▹Talk to teachers, find the real need and decide with Product and Design

Requirements

• ▹At least three years of experience building and operating modern web applications, ideally with TypeScript, Node.js and Next.js
• ▹Designed and built APIs, data models and backend services
• ▹Solid in API design, databases and asynchronous processes
• ▹Comfortable in React and Next.js to take features to the UI when needed
• ▹Hands-on experience with LLM-based features or agentic systems; understands tool calling and how to test quality
• ▹Copes with open requirements and takes ownership
• ▹Product thinking

Nice to have

• ▹Experience with CI/CD, Docker, Kubernetes and monitoring

Soft skills

What we offer

• ▹EUR 70,000 to 100,000 gross annual salary depending on experience, plus equity (VSOP)
• ▹100% remote work, modern office in Bielefeld if preferred
• ▹Large scope for ownership, direct work with the founders
• ▹High budget as long as the value is there
• ▹Development budget, coaching and clear career perspectives
• ▹30 vacation days and EUR 50 monthly tax-free benefit
• ▹Regular team events and offsites

About the company

paddy is the agentic operating system for teaching and learning, relieving teachers and improving learning outcomes. Thousands of teachers and hundreds of thousands of learners already use it; the ambition is to build the European AI player for education.