Senior AI Product Engineer

Who you are

• TypeScript, React, Node: Non-negotiable. You're comfortable shipping into our web app end-to-end — front-end, backend service, API
• Strong Python: You have 5+ years writing production-grade Python. You write clean, well-structured code
• End-to-end product delivery: You've shipped AI-powered features into a production web app and owned the integration from research code to real users
• LLM application depth: You have deep hands-on experience building and deploying LLM/agent systems — RAG, tool use, multi-step reasoning, evals
• Backend engineering skills: You design APIs, data pipelines, and services
• Product mindset: You're comfortable with ambiguity and can judge when something is good enough to ship
• Sharp problem solver: You look at a complex system, quickly identify what matters, and decide what to do next
• Bias for action: When you're unsure something will work, your instinct is to find out with data rather than keep wondering

What the job involves

• Join our team and build the intelligent systems at the core of Cosuno's platform
• Generative AI: Build and improve our LLM-powered systems that navigate the complex, often messy tendering workflow
• Ship end-to-end into the product: Own features from model/agent through API to the TypeScript front-end — backend service, API, and the integration into the web app
• Collaborate across teams: Work with Product, Engineering, and Data to translate business problems into shipped AI features
• Maintain production AI: Monitoring, alerting, and continuous improvement of everything we deploy

Benefits

• Flexible working hours
• Working fully remote or from our office in Berlin
• Possibility to do workations
• Modern work equipment
• Company offsites and regular team events (offline and online)