Senior AI Engineer

Stack

Responsibilities

• ▹Take new models and AI capabilities from idea to production — design, train, evaluate, deploy, iterate
• ▹Improve price prediction models that help users evaluate bids, trained on millions of price data points
• ▹Iterate on ranking, search and retrieval systems that match the right subcontractors to the right tenders
• ▹Design offline evaluations, run online A/B tests, and drive metrics-led iteration
• ▹Build and improve an agentic system that orchestrates multi-step reasoning for the complex tendering workflow
• ▹Ship models, backend services, APIs and the integration into the TypeScript web app to real users
• ▹Collaborate with Product, Engineering and Data to translate business problems into shipped ML/AI features
• ▹Maintain production ML & AI: monitoring, alerting, and continuous improvement

Requirements

• ▹5+ years building, training and shipping ML models — classical ML and deep learning — in production
• ▹Fluent in a modern deep learning framework, ideally PyTorch
• ▹5+ years writing production-grade Python, clean and well-structured code
• ▹Deep hands-on experience building and deploying LLM/agent systems — RAG, tool use, multi-step reasoning, evals
• ▹Experimentation rigor: offline metrics, online A/B tests, letting the data decide
• ▹Comfortable shipping into the web app — TypeScript, React, Node.js
• ▹Track record of end-to-end product delivery, not just models but shipped features

Nice to have

• ▹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

Soft skills

What we offer

• ▹Shape a product that solves real-life problems in the construction industry
• ▹Open-minded, collaborative, dynamic, 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
• ▹Possibility to do workations
• ▹Competitive compensation, permanent contract, modern equipment
• ▹Open feedback culture with regular 1-on-1s

About the company

Cosuno is a fast-growing tech startup making the construction industry more efficient and transparent with its digital platform for tenders and procurement.