Senior Data Scientist

About the role

Twoday Denmark is seeking an experienced Senior Data Scientist to join its AI team in Copenhagen. You will translate vague business problems into well‑posed prediction tasks, build robust models, and see them through to production alongside data engineers, AI/ML engineers, and cloud architects.

Key responsibilities

• Deliver end‑to‑end analytical work for customer projects, including data exploration, feature engineering, baseline modelling, validation and documentation.
• Collaborate with customers to define targets, decision contexts and success criteria, and propose appropriate algorithmic approaches.
• Build production‑ready models with AI/ML engineers, choose business‑aligned evaluation metrics, and support model monitoring after deployment.
• Present findings to stakeholder groups, explain trade‑offs, and mentor less‑experienced colleagues through code reviews and pairing.

Required profile

• Hands‑on data science experience with at least one model taken from prototype to production.
• Ability to turn business objectives into formal AI/ML problems, define target variables and assess data feasibility early.
• Strong applied statistics knowledge, rigorous validation and clear communication of uncertainty.
• Fluent spoken and written Danish.

Required skills

• Azure Machine Learning, Azure Databricks or Microsoft Fabric.
• Predictive modelling techniques: classification, regression, time‑series and generative AI.
• Experience with generative AI, Retrieval‑Augmented Generation (RAG) architectures and prompt evaluation.
• Understanding of model governance: reproducibility, documentation, GDPR, bias and fairness.

What we offer

• Modern offices across the Nordics with the flexibility to work from Oslo, Stockholm, Copenhagen, Helsinki or Vilnius.
• Opportunities to grow towards a lead role within an international, innovative technology group.