Full Stack Developer (AI SaaS)

About the Role

Build and improve a full-stack AI SaaS product that helps customers navigate complex product ranges through chat and voice agents. The product supports online and in-store experiences, so your work will contribute to practical AI-powered product discovery and commerce.

What You'll Do

• Develop and maintain full-stack features for AI chat and voice agent experiences.

• Build backend services using NestJS, TypeScript, and MongoDB.

• Integrate current LLM APIs into product workflows.

• Contribute to product capabilities for online and in-store customer experiences.

What We're Looking For

• Several years of professional experience working with NestJS.

• Very strong TypeScript skills and solid experience with MongoDB.

• Hands-on experience integrating current LLM APIs.

• Experience building full-stack software, with an interest in AI SaaS products and customer-facing chat or voice experiences.

Location

This role can be remote across Europe, with a hybrid option from Cologne or Hamburg, Germany. The primary location is Cologne, Germany.