Senior AI Engineer – LLMs & Agents at Cosuno

Cosuno is a fast-growing tech startup making the construction industry more efficient and transparent with a digital platform for tenders and procurement processes. AI analyzes millions of price data points and helps construction companies create precise and efficient bids. Position: Senior AI Engineer Location: Berlin, Germany (fully remote team) Posted: March 1, 2026 Key Responsibilities: - AI Agent Development: Build and improve the agentic system that orchestrates multi-step reasoning to navigate the complex, often messy tendering workflow - Ranking & Search: Design ranking algorithms and retrieval systems for subcontractor matching and marketplace search - Price Prediction: Develop models estimating fair construction work pricing - ML Pipelines: Own end-to-end machine learning lifecycle from architecture through production deployment - Experimentation: Design offline evaluations, A/B tests, and metrics-driven iterations for continuous model improvement - Cross-team Collaboration: Translate business problems into ML solutions, work with Product, Engineering, and Data teams - Production ML: Monitor and maintain deployed models with continuous improvement Requirements: - Python Expertise: 5+ years writing production-grade Python with clean, structured code - ML/LLM Depth: Strong foundations in classical ML and LLMs, with specialized experience in price prediction, search/ranking systems, or conversational agents - Backend Skills: APIs, data pipelines, and services development - Quick identification of priorities in complex systems - Data-driven decision-making approach - Bias for action mentality Bonus: - Master's/PhD in ML, CS, Statistics - TypeScript experience Benefits: - Fully remote with flexible hours - Competitive compensation and permanent contract - Company off-sites and team events - Workation flexibility - Open feedback culture with regular 1-on-1s