Clera

Full Stack Developer (AI SaaS)

Cologne
Level
Mid
Work type
On-site · Cologne
Visa
Not offered

Not stated in the posting: salary.

Open. First seen 25 October 2026.

Apply on the company's site →

About the role

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.

What this role asks for

Particular to this role

MongoDB · Nest.js

Rare in Clera's other 299 open postings.

Standard for full stack roles

TypeScript

Common in full stack postings at any company.

Compared with Clera's other open jobs.

The team: Engineering HIRES STEADILY

This role is one of 464 open in Engineering. 398 were posted in the last 30 days and the oldest in March: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

Python (196 of 464), LLM (195 of 464), TypeScript (183 of 464), React (145 of 464), Machine Learning (119 of 464), PostgreSQL (87 of 464), JavaScript (82 of 464)

OTHER ROLES ON THIS TEAM

From the team and dates on Clera's own job board.

Other openings for this role

2 open postings for this role in Cologne, first posted 10 October 2026. The company is likely hiring for more than one position. None has been taken down and posted again.

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