You build robust services and develop intelligent interfaces to LLMs
You design and implement features based on Large Language Models and related NLP methods (e.g., RAG, vector databases, agent systems)
You develop performant, secure, and scalable services in Next.js (API-first)
You work closely with Product, Design, and Frontend to develop features
You bring clean engineering practices into a startup environment
You stay up to date with new AI approaches and integrate them hands‑on into the product

3+ years of experience developing and operating modern web applications (Node.js, Next.js, TypeScript)
Initial or deeper experience working with LLMs, conversational AI, RAG pipelines, or frameworks like LangChain
Confident working with API design, databases (SQL/NoSQL/vector), containerization (Docker, Kubernetes), and CI/CD
You find simple solutions to complex problems and build systems that scale
Team-player mentality: you enjoy working cross-functionally, are open to feedback, and are eager to take responsibility
Fluent in German and very good English

Remote-friendly & flexible hours: hybrid model with a modern office in Bielefeld and the option to work remotely
Equity: (0.1–0.5%) VSOPs
30 days of vacation: plus flexible arrangements for special occasions
Development & learning: budget for training, access to coaching, and clear development paths
Direct impact: your work improves the daily life of thousands of teachers
Ownership from day one: you work closely with the CTO on the product vision
Team culture: ambitious, pragmatic team with an open feedback culture and a clear mission
Additional benefits: tax-free non-cash benefits (€50)
Strong backing: with HTGF as lead investor we are financially solid and ready to scale

Senior Fullstack AI Engineer

Key skills