Senior AI Engineer

About the role

Join our AI team and build the intelligent systems at the core of Cosuno's platform.

What you'll do

• AI Agent Development: Build and improve our agentic system that orchestrates multi-step reasoning to 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.
• Ranking, Search & Retrieval: Iterate on the ranking and retrieval systems that power subcontractor matching and marketplace search.
• Price Prediction: Improve models that estimate fair pricing for construction work, helping users evaluate bids and make better procurement decisions.
• Experimentation & Evaluation: Design offline evals, run online A/B tests, and drive metrics-led iteration.
• 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.

What you'll need

• Strong Python: 5+ years writing production-grade Python. Clean, well-structured code.
• TypeScript, React, Node: Non-negotiable. Comfortable shipping into our web app end-to-end — front-end, backend service, API.
• End-to-end product delivery: Shipped features (not just models) into a production web app and owned the integration from research code to real users.
• LLM application depth: 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: Comfortable with ambiguity and can judge when something is good enough to ship.
• Bias for action: When unsure something will work, your instinct is to find out with data rather than keep wondering.

Nice to have

• Comfort with 'classical' ML foundations
• Experience building search/ranking/recommendation or price prediction systems

What they offer

• Fully remote team and work culture
• Freedom in your working hours — it's the results that count
• Competitive compensation, a permanent contract, and modern work equipment
• Company off-sites and regular team events (offline and online)
• Flexible working conditions with the possibility to do workations
• Open feedback culture with regular 1-on-1s