Clera
Full Stack Developer (AI SaaS)
Cologne
- Salary
- Not stated
- Level
- Mid
- Work type
- On-site · Cologne
- Visa
- Not stated
Open. First seen 10 October 2026.
The team: Engineering HIRES STEADILY
This role is one of 246 open in Engineering. 180 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
LLM (118 of 246), TypeScript (112 of 246), Python (103 of 246), React (92 of 246), Machine Learning (61 of 246), PostgreSQL (44 of 246), JavaScript (41 of 246)
OTHER ROLES ON THIS TEAM
- Senior Founding Product Engineer posted Oct 16
- Senior Integration Engineer posted Oct 16
- AI-Native Founding GTM Lead posted Oct 16
- Founding Engineer posted Oct 16
- Senior Member of Technical Staff, Agents posted Oct 16
- AI Engineer (Mid-Level) posted Oct 16
- Senior Member of Technical Staff posted Oct 16
- Founding Applied AI Engineer posted Oct 16
- Senior Forward Deployed Engineer posted Oct 16
- Founding Product Engineer posted Oct 16
- Agent Engineer posted Oct 16
- Senior Product Engineer posted Oct 16
- Senior Applied AI Engineer posted Oct 16
- Founding Forward Deployed Engineer posted Oct 16
- Senior/Staff Software Engineer, Platform posted Oct 16
- Founding Engineer, Computer Vision & Robotics posted Oct 16
- Product Engineer posted Oct 16
- Mid-Level GTM Engineer posted Oct 16
- Robotics Engineer, Autonomous Systems (Mid-Level) posted Oct 16
- Senior Member of Technical Staff posted Oct 16
- Software Engineer, Mid-Level posted Oct 15
- Senior Product Engineer posted Oct 15
- Founding Product Designer posted Oct 15
- Founding Engineer posted Oct 15
- Backend Engineer posted Oct 15
- Founding Engineer posted Oct 15
- Mid-Level Platform Engineer (Kubernetes) posted Oct 15
- Senior Silicon Engineer posted Oct 15
- Senior Product Manager, SMB Platform posted Oct 15
- Senior Product Manager, Banking posted Oct 15
- Founding Machine Learning Engineer posted Oct 15
- Founding Technical Partnerships Lead posted Oct 15
- Founding Software Engineer posted Oct 15
- Senior Product Designer posted Oct 15
- Founding Design Engineer posted Oct 15
- Senior Technical Product Manager posted Oct 15
- Founding Engineer, Infrastructure posted Oct 15
- Founding Product Manager posted Oct 15
- Senior Founding Backend Engineer posted Oct 15
- Research Engineer, Mid-to-Senior posted Oct 15
- Senior MTS Software Engineer posted Oct 15
- Founding Engineer posted Oct 15
- Founding ML Research Engineer posted Oct 15
- Founding DevOps Engineer posted Oct 15
- Founding Product Engineer posted Oct 15
- Machine Learning Engineer (Mid-Level) posted Oct 15
- Founding DevOps Engineer posted Oct 14
- Founding Backend Engineer posted Oct 14
- Founding ML Research Engineer posted Oct 14
- Founding Product Engineer posted Oct 14
- Technical Operations Lead posted Oct 14
- Founding Engineer (Full Stack) posted Oct 14
- Founding Engineer posted Oct 14
- Associate Fullstack Engineer posted Oct 14
- Backend Engineer (Mid-Level) posted Oct 14
- Founding Forward Deployed Engineer posted Oct 14
- Founding Engineer posted Oct 14
- Product Engineer, Mid-Level posted Oct 14
- Forward Deployed Engineer, Early Career posted Oct 14
- Founding Engineer posted Oct 14
- Product Engineer (Mid-Level) posted Oct 14
- Founding Forward Deployed Engineer posted Oct 14
- Talent AI Operator posted Oct 14
- Senior Android Software Engineer posted Oct 14
- GTM Engineer posted Oct 14
- Senior Fullstack Engineer posted Oct 14
- Mid-Level Platform Engineer, Biotech posted Oct 14
- Technical Writer posted Oct 14
- Founding Software Engineer posted Oct 13
- Lead Research Engineer, Data Quality posted Oct 13
- Senior Engineer, Europe to San Francisco posted Oct 13
- Principal AI Architect posted Oct 13
- Founding Engineer, Full-Stack/AI (m/w/d) posted Oct 13
- Founding Engineer posted Oct 13
- Senior Full-Stack Software Engineer, Design posted Oct 13
- Technical Chief of Staff posted Oct 13
- Founding Engineer, NLP Systems & Infrastructure posted Oct 13
- Senior Integrations Engineer posted Oct 13
- Founding Product Engineer posted Oct 13
- Founding Cloud Infrastructure Engineer posted Oct 13
- Senior Agent Product Manager posted Oct 13
- Founding Product Engineer posted Oct 13
- Founding Engineer posted Oct 13
- Mid-Level Product Engineer posted Oct 13
- Founding Engineer posted Oct 13
- Founding Data Engineer (Pricing/Comps) posted Oct 13
- Senior Technical Program Manager posted Oct 13
- Research Engineer, Privacy and Anonymization (Mid-Level) posted Oct 13
- Research Engineer, QC Automation posted Oct 13
- Senior Full-Stack Software Engineer, Reinforcement Learning posted Oct 13
- Senior Software Engineer, Infrastructure posted Oct 13
- Mid-Level Research Engineer, Benchmarks posted Oct 12
- Senior Security Engineer posted Oct 12
- Research Engineer, Synthetic Data (Mid-Level) posted Oct 12
- Mid-Level GTM Engineer posted Oct 12
- Mid-Level Forward Deployed Research Engineer posted Oct 12
- Founding ML Engineer, Computer Vision (Object Detection) posted Oct 12
- Senior Member of Technical Staff posted Oct 12
- Mid-Level Product Engineer posted Oct 12
- Founding Hardware Engineer posted Oct 12
- US Founding Engineer posted Oct 12
- Founding RL Engineer posted Oct 12
- Senior Product Engineer posted Oct 12
- Senior Backend Engineer posted Oct 12
- Senior Freelance Product Designer (Fractional) posted Oct 12
- Staff Engineer, Agentic AI posted Oct 12
- Senior Robotic Systems Engineer posted Oct 12
- Deployment Strategist / Success Engineer posted Oct 12
- Founder's Associate, Product posted Oct 12
- Founding Product Engineer posted Oct 12
- Founding Electrical Engineer posted Oct 11
- Principal Product Manager, AI Platform posted Oct 11
- Senior Pricing Architect posted Oct 11
- Lead Product Designer posted Oct 11
- Founding Engineer (AI/ML) posted Oct 11
- Forward Deployment Engineer posted Oct 11
- Senior Product Engineer posted Oct 11
- Founding Engineer (Applied AI) posted Oct 11
- Lead AI Engineer, Agents & Infrastructure posted Oct 11
- AI/ML Engineer posted Oct 11
- Founding Agentic Engineer posted Oct 11
- Founding GTM Engineer posted Oct 11
- Senior Full-Stack Developer, Backend Focus posted Oct 11
- Strategy & Operations, Product Growth Associate posted Oct 11
- Founding Engineer posted Oct 11
- Senior AI Engineer posted Oct 11
- Founding Product Designer/Engineer posted Oct 11
- Founding Engineer (AI and Geometry/CAD) posted Oct 11
- Senior Data Engineer posted Oct 11
- Founding Engineer posted Oct 10
- Founding Product Engineer posted Oct 10
- Senior Software Engineer posted Oct 10
- Agent Product Manager posted Oct 10
- Senior Forward Deployed Engineer posted Oct 10
- Fractional Founding Designer posted Oct 10
- Software Engineer, Foundation posted Oct 10
- Senior Solutions Engineer posted Oct 10
- Product Engineer, Mid-Level to Staff posted Oct 10
- Lead Data Platform Engineer posted Oct 10
- Senior Forward Deployed Engineer posted Oct 10
- Senior Product Engineer posted Oct 10
- Senior Platform Engineer posted Oct 10
- Senior Product Manager posted Oct 10
- Developer Relations Engineer posted Oct 10
- Senior Data Scientist posted Oct 10
- Senior Software Engineer, Voice AI / Backend posted Oct 10
- AI Infrastructure / Product Engineer posted Oct 10
- Founding Engineer posted Oct 10
- Legal Engineer posted Oct 10
- Junior to Mid-Level GTM Engineer posted Oct 10
- Senior Forward Deployed Engineer posted Oct 10
- Founding Engineering Lead posted Oct 10
- Director of IT posted Oct 10
- Senior Member of Technical Staff posted Oct 10
- Technical Sales / Business Development Manager posted Oct 10
- Founding Product Designer posted Oct 10
- Entry-Level Robot Learning Engineer posted Oct 10
- QA Engineer posted Oct 10
- Senior Product Engineer posted Oct 10
- AI-Native Founding Chief of Staff posted Oct 10
- Senior Founding Product Engineer posted Oct 10
- Senior Integration Engineer posted Oct 10
- AI-Native Founding GTM Lead posted Oct 10
- Founding Engineer (Europe) posted Oct 10
- Member of Technical Staff, Agents posted Oct 10
- Mid-Level AI Engineer posted Oct 10
- Senior Member of Technical Staff posted Oct 10
- Founding Applied AI Engineer posted Oct 10
- Senior Forward Deployed Engineer posted Oct 10
- Founding Product Engineer posted Oct 10
- Computer Vision & Robotics Intern posted Oct 10
- Senior Agent Engineer posted Oct 10
- Senior Product Engineer posted Oct 10
- Senior Applied AI Engineer posted Oct 10
- Founding Forward Deployed Engineer posted Oct 10
- Senior/Staff Software Engineer, Platform posted Oct 10
- Machine Learning Engineer (Mid-Level) posted Oct 10
- Founding Engineer, Computer Vision & Robotics posted Oct 10
- Product Engineer, Mid-Level posted Oct 8
- GTM Engineer posted Aug 10
- Founding AI Engineer posted Aug 5
- Senior Product Manager, Growth posted Aug 1
- Technical Product Marketing Manager, Mechanical Engineering posted Aug 1
- Pricing Architect posted Aug 1
- Founding Design Engineer posted Aug 1
- Founding Full Stack Engineer posted Aug 1
- Founding AI Engineer posted Aug 1
- Founding Product Engineer posted Aug 1
- Founding AI Engineer posted Aug 1
- Founding Forward Deployed Engineer posted Jul 18
- Founding Engineer: Agent Infrastructure posted Jun 7
- Frontend Engineer posted Jun 3
- Head of Engineering posted Jun 3
- Senior AI/ML Engineer posted Jun 3
- Founding Engineer - Full Stack posted Jun 3
- Product Engineer (Software Engineer) posted Jun 3
- Platform Engineer (Kubernetes) posted Jun 3
- Founding Engineer posted Jun 3
- Founding Engineer posted Jun 3
- Senior Android Software Engineer posted Jun 3
- Founding Engineer posted Jun 3
- Founding Engineer posted Jun 3
- Founding Software Engineer posted Jun 3
- Senior/Staff Software Engineer (Platform) posted Jun 3
- Forward Deployed Engineer (Founding Customer Engineer) posted Jun 3
- Software Engineer - Full Stack posted Jun 3
- Backend-Leaning Product Engineer posted Jun 3
- Founding Engineer Intern posted Jun 3
- Founding Engineer posted Jun 3
- Founding Full Stack Engineer posted Jun 3
- Founding Engineer posted Jun 3
- Frontend Engineer - Cluster OS Platform posted Jun 3
- Medical AI Researcher posted Jun 3
- Staff Engineer - Agentic AI posted Jun 3
- Founding Engineer posted Jun 3
- AI/ML Engineer posted Jun 3
- Member of Technical Staff posted Jun 3
- Founding Product Engineer posted Jun 3
- Founding Engineer (Full-Stack) posted Jun 3
- AI Engineer (Mid-Level) posted Jun 3
- Applied AI Engineer (Matching & Search) posted Jun 3
- Founding Engineer ($3M pre-seed) posted May 31
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer – SF Hackerhouse (Visa sponsored; $3M pre-seed) posted Mar 23
- Member of Technical Staff / Fullstack Engineer posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer – SF Hackerhouse (Visa sponsored; $3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer – SF Hackerhouse (Visa sponsored; $3M pre-seed) posted Mar 23
- Founding Engineer – SF Hackerhouse (Visa sponsored; $3M pre-seed) posted Mar 23
- Founding Engineer – SF Hackerhouse (Visa sponsored; $3M pre-seed) posted Mar 23
- Founding Engineer – SF Hackerhouse (Visa sponsored; $3M pre-seed) posted Mar 23
- Founding Engineer – SF Hackerhouse (Visa sponsored; $3M pre-seed) posted Mar 23
- Founding Engineer – SF Hackerhouse (Visa sponsored; $3M pre-seed) posted Mar 23
- Founding Engineer – SF Hackerhouse (Visa sponsored; $3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
- Founding Engineer ($3M pre-seed) posted Mar 23
From the team and dates on Clera's own job board.
About the role
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.
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