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Full Stack Developer (AI SaaS)

CleraCologneEngineering
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Salary
Not listed
Job type
Full-time
Experience
Mid
Posted
10 Oct 2026
Status
Open · checked 7d ago

About this role

Cologne (remote across Europe) – The Full Stack Developer role at Clera is designed for engineers with solid TypeScript and NestJS experience who want to build AI-driven chat and voice solutions. This position suits candidates interested in creating SaaS products that enhance both online and in-store shopping experiences.

Role Overview

Clera seeks a Full Stack Developer to expand and refine its AI SaaS platform that enables customers to explore complex product catalogs via conversational agents. The work will directly impact how users interact with the service in digital and physical retail settings.

Key Responsibilities

Design, develop, and maintain full-stack features for AI chat and voice agents.
Construct backend services using NestJS, TypeScript, and MongoDB.
Integrate large language model (LLM) APIs into existing product workflows.
Enhance product capabilities to support seamless online and in-store customer experiences.

Requirements

Several years of professional experience with NestJS.
Strong proficiency in TypeScript.
Solid experience working with MongoDB.
Practical hands-on experience integrating current LLM APIs.
Background in building full-stack applications, with a focus on AI SaaS and customer-facing chat or voice interfaces.

Skills and Tools

Frameworks: NestJS
Languages: TypeScript
Databases: MongoDB
AI Services: LLM APIs (e.g., OpenAI, Anthropic)
Product Focus: Chat and voice agents for commerce

About the Company

Clera develops AI-powered SaaS solutions that help retailers guide customers through extensive product ranges. Their platform combines chat and voice technologies to deliver practical product discovery both online and in physical stores.

How to Apply

Interested candidates should submit their application through Cleara’s official careers page.

Skills and tech stack

Questions candidates ask

Is this position fully remote?

The role can be performed remotely across Europe, with a hybrid option available from Cologne or Hamburg, Germany.

What primary technologies will I use?

You will work with NestJS, TypeScript, MongoDB, and integrate large language model APIs.

Do I need prior experience with AI chat or voice agents?

Experience building full-stack software and an interest in AI SaaS products, especially chat or voice experiences, is required.

What level of experience is expected?

The posting asks for several years of professional experience with NestJS and related technologies.

Ready to apply?

The application is on the official Clera careers page.

Apply on company site