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Full Stack Developer (AI SaaS)

Clera · Cologne

Workplace
On-site
Job type
Full-time
Experience
3+ years
Posted

About the role

Full Stack Developer (AI SaaS) at Clera in Cologne. On-site, full-time. Posted October 25, 2026.

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.

Prefer to apply yourself? Apply on Clera’s site

Quick answers

Where is this job based?

Cologne. The role is on-site.

How much experience do you need?

The posting asks for 3+ years.

How do you apply?

Apply on Clera’s site using the link on this page. With a free Jobmagic account you can see how well you fit first.

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