Data Scientist Mobile

Tesco Mobile
• Slough or Welwyn Garden City
• Permanent
• Apply by 30-Jan-2026

We're looking for a curious and collaborative Data Scientist to join our Data Science Chapter at Tesco Mobile. This is a hands‑on role where you'll use data and analytical thinking to solve real business problems and improve customer experiences.

You’ll work on a wide range of projects, from personalising customer communications and improving marketing effectiveness, to optimising stock management and reducing customer churn. Your work will directly shape how we make decisions across the business, always keeping our customers at the heart of what you do.

You’ll be based in Welwyn Garden City, Slough, or other Tesco offices (including London), with occasional travel to other Tesco Mobile or supplier sites. You’ll also attend regular chapter meetings, typically held every two weeks in Slough or London.

We’re committed to flexibility and welcome conversations about full‑time, part‑time and job share working.

We’re all about the little helps. That's why we make sure our Tesco colleague benefits package takes care of you - both in and out of work.  to find out more!

• Annual bonus scheme of up to 20% of base salary
• Holiday starting at 25 days plus a personal day (plus Bank holidays)
• Private medical insurance
• 26 weeks maternity and adoption leave (after 1 years' service) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 6 weeks fully paid paternity leave
• Free 24/7 virtual GP service, Employee Assistance Programme (EAP) for you and your family, free access to a range of experts to support your mental wellbeing

• Build, validate, optimise and manage data science models and data pipelines.
• Own key stages of the data science lifecycle, including deployment to production, testing, CI/CD, documentation and security.
• Analyse complex and diverse datasets using statistical methods to generate insights that improve customer experience and business outcomes.
• Continuously identify opportunities to improve products, processes and performance through innovative data‑driven solutions.
• Develop a strong understanding of internal datasets and share knowledge openly with colleagues.
• Promote a positive and inclusive data science culture across the organisation.
• Work collaboratively within product delivery teams and squads to deliver impactful outcomes.
• Define resolution paths for challenges, contribute to project plans and support resource planning.
• Take ownership of your decisions and clearly communicate your approach and rationale.

• Intermediate experience in SQL, Python and PySpark, with a solid understanding of good coding practices such as object‑oriented programming.
• Experience working with databases and combining multiple data sources for modelling and analysis.
• Experience in code optimisation and standard software development practices, including writing tests.
• The ability to translate ambiguous business questions into structured, hypothesis‑driven analysis.
• Confidence explaining complex ideas in clear, non‑technical language to a wide range of stakeholders.
• Strong listening and communication skills, with a customer‑focused approach.
• The confidence to review and constructively challenge work in a positive, inclusive way.

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A 50‑50 joint venture between Tesco and VMO2 that was established back in 2003, Tesco Mobile has gone from strength to strength as we've launched into new services and markets. With more than 5 million customers, we're the largest mobile virtual network operator in the UK. We're proud to have an inclusive culture that's uniquely Tesco Mobile, with a strong sense of community, plus all the benefits of working for one of the shareholders.

We care for human connection and we keep our customers at the heart of everything we do, which is why we've embraced the Agile way of working. Agile is more than just a methodology - it's a liberating journey that puts customers and purpose first. It empowers us to self‑organise, collaborate, co‑create and rapidly inspect and adapt everything we do - allowing us to respond at…