Overview
At Tesco Mobile, we use data to connect people and shape personalised experiences. We are looking for a Senior Data Scientist to build and deploy scalable models that drive real‑world outcomes for our customers.
Why Join Us?
- Work on high‑impact projects that influence real business outcomes
- Be part of a collaborative, forward‑thinking team
- Combine deep technical work with real‑world application
- Grow your expertise in a supportive and innovative environment
Role Details
This role can be based in Welwyn Garden City or our Slough office with occasional travel required.
- Team collaboration is key – you'll attend a fortnightly team meeting (typically in Slough or London)
- We embrace hybrid working, with a minimum of 2 days per week in the office
Responsibilities
- Own end‑to‑end delivery of data science solutions – from problem framing, feature engineering, monitoring, evaluation and deployment
- Design and execute hypothesis‑driven analysis and statistical testing (e.g., experiment design, assumption checking, uncertainty quantification) and translate results into clear business recommendations
- Build and productionise propensity models to support targeting, next‑best‑action and other decisioning use cases
- Build and productionise time series forecasting models for demand and stock perspectives; perform back‑testing and continuously improve forecast accuracy
- Partner with stakeholders to define success metrics and deliver meaningful outcomes
- Build, validate and optimise robust data pipelines and model code – testing, performance, reproducibility, documentation and security considerations
- Contribute to team growth through knowledge sharing, mentoring and best practice
Essential Experience
- Demonstrated ability to solve ambiguous problems and deliver end‑to‑end analytical solutions
- Strong grounding in applied statistics (hypothesis testing, experiment design, uncertainty analysis)
- Proven experience with both static and time series modelling
- Advanced skills in Python, SQL, and PySpark, with a focus on clean, testable, reproducible code
- Experience deploying models in cloud environments (Azure preferred), including CI/CD and monitoring
- Strong communication skills – able to simplify complex ideas for non‑technical audiences
- PhD or Masters Degree
Desired Experience
- Experience with tools such as MLflow, PyTorch, Databricks, or graph databases
- A passion for continuous improvement and sharing knowledge
- A collaborative mindset with excellent stakeholder engagement skills
Benefits
Hybrid working blend – a mix of office and remote (2 days per week in the office). Flexible working patterns across full‑time and part‑time positions.
Equal Opportunity Employer
Tesco is an equal opportunity employer. We are committed to a fully inclusive and accessible recruitment process.
