90K–120K EUR / year
Senior Product Engineer (AI Agents)
AIRemote — Berlin
Published on 2026-09-10
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About this role
Build and ship LLM-powered features for Cosuno’s construction tendering and procurement platform. Own AI capabilities end to end, from models and backend services through APIs to the TypeScript web app, and improve them in production.
About the company
Cosuno is a construction tendering platform that helps contractors find relevant bids and submit offers across the DACH market.
The team
Tech and Software Development
Stack
TypeScriptReactNode.jsPythonAWSKubernetesTerraformCypress
What you'll do
- Build and improve LLM-powered systems for tendering workflows
- Deliver AI features end to end, from models and APIs to the web app
- Collaborate with Product, Engineering, and Data to turn business problems into shipped features
- Monitor, maintain, and continuously improve production AI systems
What we're looking for
- Strong TypeScript, React, and Node.js skills
- At least 2 years of production-grade Python experience
- Experience shipping AI-powered features in a production web app
- Hands-on experience with LLM and agent systems, including RAG, tool use, multi-step reasoning, and evaluations
- Experience designing APIs, data pipelines, and backend services
- Strong product judgment, problem-solving skills, and bias for action
Benefits
- Option to work fully remotely or from the Berlin office
- Flexible working hours
- New MacBook Pro
- Company off-sites and team events
- Permanent contract