iOS Engineer (London Based)

Tesco UK • Welwyn Garden City • Hybrid • Full-Time • Permanent • Working hours 36 • Apply by 03-Apr-2026

As a Mid-Level Software Engineer at Tesco Technology, you will be a key player in our technology team, contributing to the design, development, and maintenance of high-performance iOS applications. We are seeking an experienced iOS developer with a strong background in software design, programming skills, and a passion for delivering exceptional applications. If you thrive in a collaborative environment and enjoy pushing the boundaries of technology, we would like to meet you.

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
Responsibilities:
1. Architectural Leadership:
- Lead the design and implementation of customer-facing features, contributing to the overall system architecture.
- Collaborate with product managers and backend teams to design robust and scalable software solutions.
2. Code & Development:
- Design, build, and maintain high-performance, reusable, and reliable code.
- Implement new features in production, ensuring code quality and adherence to best practices.
3. Quality Assurance:
- Write unit-test code to ensure robustness, usability, and reliability of the iOS applications.
- Utilize debugging skills to identify and address memory leaks, performance bottlenecks, and other issues.
4. Technology Exploration:
- Continuously discover, evaluate, and implement new technologies to maximize the development process.

You will need
Qualifications:

Experience in developing iOS applications. Swift experience is required and SwiftUI is a plus.
- Proficiency with common iOS libraries like UIKit, Security, CFNetwork, CoreGraphics, XCTest , COCOAPod etc.
- Strong debugging skills, including identifying memory leaks and performance bottlenecks using tools like Debugger, Instruments, etc.
- Familiarity with Object-Oriented Programming (OOP) principles, different architectural patterns, and their testability.
- Excellent command over Data Structures and Algorithms.
- Understanding of design for scalability, performance, and reliability.
- Two or more published iOS apps in the App Store.
- Experience working in an agile environment and project management tools like Jira.
- Familiarity with Apple Design guidelines, common mobile UX patterns, and anti-patterns.

About us
Our vision at Tesco is to become every customer's favourite way to shop, whether they are at home or out on the move. Our core purpose is 'Serving our customers, communities and planet a little better every day'. Serving means more than a transactional relationship with our customers. It means acting as a responsible and sustainable business for all stakeholders, for the communities we are part of and for the planet.

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.