About the Role Join a growing AI SaaS team building chat and voice agents that help customers navigate complex product ranges online and in stores. You'll contribute to the development of customer-facing AI products and their supporting services. What You'll Do • Build and maintain application services using NestJS and TypeScript. • Work with MongoDB to support product functionality and data needs. • Integrate current large language model APIs into AI-powered features. What We're Looking For • Several years of professional NestJS experience, typically within a 3 to 10+ year engineering background. • Very strong TypeScript skills and solid MongoDB experience. • Hands-on experience with current LLM APIs. • Native or C2-level German proficiency. Compensation & Benefits Visa sponsorship is not available. Location Remote across Europe, or hybrid from Cologne or Hamburg, Germany. The primary location is Cologne, North Rhine-Westphalia, Germany.