Erstellt am 21. Juli 2026
Senior ML Engineer
Cosuno Ventures
Berlin, Berlin 10115, Germany
Vollzeit
Reference: 455450364
Your mission
Join our AI team and build the intelligent systems at the core of Cosuno's platform.
Cosuno - Revolutionizing construction through technology.
We are Cosuno - a fast-growing tech startup that is making the construction industry more efficient and transparent with our digital platform for tenders and procurement processes. Our goal: to solve the most complex challenges in the industry with innovation and simplicity.
Join our AI team and build the intelligent systems at the core of Cosuno's platform.
- AI for Construction: Take new models and AI capabilities from idea to production - design, train, evaluate, deploy, iterate - and own them end to end.
- Price Prediction: Improve the models that help users evaluate bids and make better procurement decisions, trained on millions of price data points.
- Ranking, Search & Retrieval: Iterate on the systems that match the right subcontractors to the right tenders.
- Experimentation & Evaluation: Design offline evals, run online A/B tests, and drive metrics-led iteration.
- AI Agent Development: Build and improve our agentic system that orchestrates multi-step reasoning to navigate the complex, often messy tendering workflow.
- Ship into the product: Take your work all the way to real users - model, backend service, API, and the integration into our TypeScript web app.
- Collaborate across teams: Work with Product, Engineering, and Data to translate business problems into shipped ML/AI features.
- Maintain production ML & AI: Monitoring, alerting, and continuous improvement of everything we deploy.
- Strong ML & deep learning background: You have 5+ years building, training, and shipping machine learning models - classical ML and deep learning - in production. You're fluent in a modern deep learning framework, ideally PyTorch.
- Strong Python: You have 5+ years writing production-grade Python. You write clean, well-structured code.
- LLM application depth: You have deep hands-on experience building and deploying LLM/agent systems - RAG, tool use, multi-step reasoning, evals.
- Experimentation rigor: You know how to evaluate models properly - offline metrics, online A/B tests - and let the data decide.
- TypeScript, React, Node: You're comfortable shipping your work into our web app - backend service, API, and front-end integration.
- End-to-end product delivery: You've shipped features (not just models) into a production system and owned the path from research code to real users.
- 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.
- Experience building search/ranking/recommendation systems or pricing models
- Experience with embedding models, fine-tuning, or model training at scale
- Domain exposure to construction, procurement, or marketplaces
- Shape a product that solves real-life problems in the construction industry
- Work in an open-minded, collaborative, dynamic, and international team
- Fully remote team and work culture
- Freedom in your working hours. It's the results that count.
- Company off-sites and regular team events (offline and online)
- Flexible working conditions with the possibility to do workations
- Competitive compensation, a permanent contract, and modern work equipment
- Open feedback culture with regular 1-on-1s
Cosuno - Revolutionizing construction through technology.
We are Cosuno - a fast-growing tech startup that is making the construction industry more efficient and transparent with our digital platform for tenders and procurement processes. Our goal: to solve the most complex challenges in the industry with innovation and simplicity.
