Senior Data Scientist - Personalization & Predictions

The role

You will frame business problems and build ML models for predictions and contextual personalization. You will work with behavioral data at scale using BigQuery and Databricks to drive business metrics.

What you will do

• Frame business problems into measurable tasks before modelling.
• Work with behavioral data, product catalogues and event streams at scale.
• Build and evaluate models for propensity, churn, contextual bandits, autosegmentation, uplift and incrementality.
• Design evaluations including offline metrics, backtests, and A/B design.
• Research and implement new methods from literature.
• Hand off models and evidence to ML Engineering.
• Explain results to Product, Engineering leadership, and customers.

Required qualifications

• 5+ years building ML models that shipped and were used in industry.
• Strong Python.
• Genuinely strong SQL.
• Solid grounding in classical ML including tree-based models, regression, classification, and clustering.
• Rigour on experiment design and evaluation.
• Comfort on a cloud data platform like GCP (BigQuery) or Databricks.
• A quantitative degree, or equivalent practical depth.
• Working English, written and spoken.

Nice to have

• Causal inference and uplift modelling.
• Contextual bandits, sequential decision-making, or off-policy evaluation.
• Ranking, recommendation or information retrieval.
• LLM evaluation, or applied work with the GenAI stack.
• Daily use of agentic coding tools.

Benefits

• Flexible working hours.
• Virtual-first work with several hubs.
• Company events.
• 5 paid days off to volunteer.
• People Development Program with workshops.
• Access to a resident communication coach.
• Leader Development Program.
• $1,500 annual professional education budget.
• Employee Assistance Program with counselors.
• Subscription to Calm.
• DisConnect days (one additional day off each quarter).
• Sports, yoga, and meditation opportunities.

About the company

Bloomreach is building an agentic platform for personalization using an AI engine called Loomi. They power personalization for more than 1,400 global brands.