Joshua Langwell

Product Owner of a diverse, multi-disciplinary squad of data scientists, data science engineers, analysts, and insight professionals, delivering customer analytics, targeted marketing, and digital experience capabilities across Tesco Bank. Operating throughout a significant organisational transition from Tesco Group to Barclays ownership, requiring constant stakeholder navigation, governance management, and delivery continuity across shifting priorities and infrastructure.

• Owned the team roadmap, backlog, and delivery planning across multiple workstreams spanning SAS, R, Python, Adobe Analytics, Medallia DXA, and Azure. Balancing competing priorities across a broad and technically diverse squad.
• Led product delivery of ML models built on Tesco Clubcard data, enabling targeted marketing across cards, loans, and savings -supporting 8 campaigns over 2 years and establishing the foundation for future response-based modelling.
  • Navigated complex data access and governance challenges during the Tesco–Barclays separation, ensuring the team maintained continued access to Clubcard data and the Azure ML platform throughout the transition- critical to uninterrupted campaign delivery.
  • Oversaw delivery of 20+ digital insight reports via Adobe Analytics and Medallia DXA, covering conversion rate optimisation audits, customer journey analysis, and feature performance across savings, credit cards, loans, and mobile banking - providing actionable recommendations to commercial and product stakeholders.
  • Led product delivery of an automated data lineage and cataloguing tool to support migration of 600+ SAS reports to Barclays data platforms, avoiding an estimated £1.5m in manual effort costs and ~£0.5m/year in equivalent commercial tooling - while ensuring alignment to governance frameworks and standards.

Embedded within Tesco Bank's pricing analytics function, supporting commercial teams across credit cards, loans and savings to deliver price optimisation strategies through advanced analytics, ML model oversight, and stakeholder-driven insight. Worked at the intersection of data science and commercial strategy, covering the full solution lifecycle from scoping through to delivery, validation, and ongoing performance monitoring.

• Supported pricing decisions influencing £15bn+ of balances, £1bn+ of new lending across credit cards, loans, and savings - consistently delivering above-budget outcomes while maintaining APR discipline.
• Scoped, validated, and monitored a suite of ML and statistical models for acquisition strategy optimisation.
• Oversaw performance monitoring and refit management of our model suite - managing COVID-era recalibration during turbulent economic climate.
• Played a role in the development and maintenance of the bank's pricing infrastucture - the primary commercial interface for ingesting model outputs and stress-testing pricing strategies under both stressed and unstressed economic scenarios, including multi-scorecard functionality.
• Supported the development of our model monitoring framework, tracking predicted vs actual performance across all models with tolerances, refit triggers, and defined escalation processes.
• Managed stakeholder relationships with commercial teams to drive adoption of model-driven pricing approaches, guiding teams away from legacy manual methods and building confidence in new analytical infrastructure.
• Delivered data insights to support commercial decision-making across cards, loans, and savings, including pricing scenario analysis, campaign targeting, and acquisition strategy assessment.

• Analysed derivatives market data across precious metals and currency futures to support monitoring of liquidity, volumes, and pricing dynamics.
• Built and maintained regular analytical reports for internal stakeholders using exchange trading and clearing data, supporting product performance reviews and market development initiatives.
• Produced insights to support trading, risk management, and internal decision-making across key products including gold and INR futures.
• Gained exposure to exchange operations, regulatory requirements, and central clearing mechanisms within the Middle East's leading derivatives exchange.