iOS Mobile App Developer

Tesco UK • Slough • Permanent • Apply by 13-Mar-2026

We have an exciting opportunity for an iOS Mobile App Developer to join our Engineering 'chapter' here at Tesco Mobile, where you will design, code and implement customised solutions for the Tesco Mobile iOS mobile app. You will help enhance our mobile app, particularly focusing on new features and custom functionality.

You will work closely with a dynamic cross - functional squad that includes iOS and Android Developers, PO, BA, QA Engineers and other agile developers, all working together to shape, build and deliver high quality solutions and outstanding mobile experiences that delight out customers. Ultimately enabling our customers to use native mobile applications to manage their products and services on both the iOS and Android Platform.

What is in it for you

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. Click Here 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

You will be responsible for

• Design, develop, and maintain iOS features using Swift, SwiftUI, and UIKit.
• Work within established architectural patterns, contributing to scalable and maintainable app components.
• Collaborate with cross‑functional team members-including Product Owners, BAs, QAs, and other developers-to deliver high‑quality features.
• Integrate the iOS app with RESTful APIs and backend systems.
• Ensure strong app performance through profiling, debugging, and optimisation.
• Write clean, testable code and contribute to unit testing practices.
• Participate in code reviews, sharing feedback and promoting consistent coding standards.
• Stay current with the latest iOS frameworks, tools, and platform capabilities to support ongoing app improvements

You will need

• Minimum of 4 years of hands‑on iOS development using Swift.
• Experience with SwiftUI and UIKit, with good understanding of the latest iOS features.
• Knowledge of MVVM or other modern mobile architecture patterns.
• Experience integrating iOS applications with RESTful APIs.
• Proficiency in writing and maintaining unit tests.
• Understanding of push notifications, offline storage, threading, and performance optimisation.
• Good knowledge of Apple's Human Interface Guidelines and iOS ecosystem.
• Proficient with Git and collaborative development workflows.
• Strong problem‑solving, communication, and teamwork skills.
• Bonus but not essential: familiarity with Clean Architecture concepts, modular codebases, or cross‑platform technologies such as React Native or Flutter.

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About us

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 pace to our customers' needs. It encourages variety of thought and enables us to thrive, both individually and collectively.

We are proud to have an inclusive culture at Tesco where everyone truly feels able to be themselves. At Tesco, we not only celebrate diversity, but recognise the value and opportunity it brings. We're committed to creating a workplace where differences are valued, and make sure that all colleagues are given the same opportunities. We're proud to have been accredited Disability Confident Leader and we're committed to providing a fully inclusive and accessible recruitment process. For further information on the accessibility support we can offer, please click here.

We're a big business and we can offer a range of diverse full-time & part-time working patterns across our many business areas, which means that we can find something that works for you. We work in a more blended pattern - combining office and remote working. Our offices will continue to be where we connect, collaborate and innovate. If you are applying internally, please speak to the Hiring Manager about how this can work for you - Everyone is welcome at Tesco.