Senior Full Stack Developer (AI SaaS)

Clera

Cologne

On-site

Who this role is best for

Geared toward experienced full-stack developers comfortable with AI SaaS integration, with a focus on Europe-based work and specific technical stacks like NestJS and MongoDB.

Best fit for

Developers who have built and maintained backend services with MongoDB and have a track record of delivering AI-powered SaaS features.
— “Develop and support backend services and data workflows using MongoDB.”
Individuals with a background in building customer-facing AI tools and experience with complex product catalog systems.
— “Contribute to product features that help customers search and make decisions across complex product catalogs.”

Things to consider

Visa sponsorship is not available, which may limit eligibility for non-EU candidates.
— “Visa sponsorship is not available.”
The role requires a primary location in Cologne, Germany, despite hybrid options being available.
— “Primary location: Cologne, Germany.”

How to stand out

Showcase experience with LLM API integration in your resume and during interviews.
— “Integrate current LLM APIs into chat and voice agent experiences.”
Highlight projects where you developed full-stack features using TypeScript and NestJS.
— “Build and maintain full-stack features for an AI SaaS platform using TypeScript and NestJS.”

Pace · Fast PacedCollaboration · MediumAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

Developed and maintained full-stack features for an AI SaaS platform

Typical background

Several years of professional experience with NestJS

Skills & requirements

Required

TypeScriptNestJSMongoDBLlm ApisBackend ServicesData WorkflowsChat And Voice Agent Experiences

Preferred

Several Years Of Professional Experience With Nestjs

Stack & domain

TypeScriptNestJSMongoDBLLM ApisChat And Voice Agent ExperiencesCommunicationTeamworkAI SaasCustomer-facing ExperiencesProduct Catalogs

About the role

Original posting from Clera via Ashby

ABOUT THE ROLE
Join a European AI-powered B2B SaaS team building chat and voice agents that help customers navigate complex product ranges online and in stores. You will develop the platform and integrations behind these customer-facing experiences.
WHAT YOU'LL DO
Build and maintain full-stack features for an AI SaaS platform using TypeScript and NestJS.
Integrate current LLM APIs into chat and voice agent experiences.
Develop and support backend services and data workflows using MongoDB.
Contribute to product features that help customers search and make decisions across complex product catalogs.
WHAT WE'RE LOOKING FOR
Several years of professional experience with NestJS.
Very strong TypeScript skills and solid MongoDB experience.
Hands-on experience using current LLM APIs.
Based in Europe, or able to work in a hybrid arrangement from Cologne or Hamburg.
COMPENSATION & BENEFITS
Visa sponsorship is not available.
LOCATION
Remote across Europe, with hybrid options in Cologne or Hamburg. Primary location: Cologne, Germany.

Source: Clera careers (Ashby)