Senior iOS Engineer

Tesco Technology; Welwyn Garden City; Hybrid; GBP 90,000 - 125,000; Full time

Benefits offered by this job

Annual bonus up to 20%

Private medical insurance

Flexible working

Learning opportunities (Udemy, Plurals

O'Reilly access

Job summary

Tesco Technology is seeking a Senior iOS Engineer to advance the Digital Design System (DDS) for iOS. You will build reusable UI foundations, ensure accessibility, and maintain robust component APIs used across Tesco's digital ecosystem.

Collaborate with design, product engineering, and DDS teams to keep experiences consistent and scalable. You will mentor teams, improve tooling and documentation, and drive high-quality, ship-ready code.

Qualifications

• Experience building iOS components with strong APIs and accessibility.
• Ability to document APIs and developer tooling for consumption by teams.
• Proven track record in mentoring and code reviews on platform-level code.

Responsibilities

• Build, maintain, and evolve iOS DDS components with clear APIs and strong tests.
• Translate design intent and tokens into production-ready iOS implementations.
• Improve developer experience via docs, examples, onboarding, and tooling.
• Collaborate across design, accessibility, product engineering, and platform teams.
• Lead through senior engineering craft including code reviews and mentoring.

Skills

iOS development

Platform engineering

Accessibility

Code review

Mentoring

Documentation

Testing

Developer experience

Tools

Figma

MCP integrations

Job description

About the role

We're looking for a Senior iOS Engineer to help build and evolve Tesco's Digital Design System (DDS) implementation for iOS. The DDS Engineering team maintains the shared user interface foundations behind Tesco's digital ecosystem, supporting experiences used by millions of customers and colleagues every day.

This is a senior platform engineering role focused on reusable UI foundations: component APIs, accessibility, quality, documentation, release discipline, and developer experience for teams across Tesco's digital estate. Prior design system experience is valuable, but not required; we're most interested in strong platform engineers who enjoy building shared foundations used by many teams. You'll work closely with design, accessibility, product engineering, and DDS peers to keep Tesco experiences consistent, scalable, and easy to build.

You will be responsible for

You’ll create reusable components, improve developer tooling and documentation, support consuming teams, and help shape modern design-to-development workflows; using Figma, MCP integrations, agentic cloud workflows and AI-assisted engineering tools. This is not an "AI for AI's sake" role: the goal is practical engineering impact, better component reuse, fewer inconsistencies, stronger accessibility, faster onboarding, and safer migrations.

You will need

• Build, maintain, and evolve Tesco DDS platform components for iOS, with clear APIs, strong test coverage, accessibility support, and release discipline.
• Translate DDS design intent, tokens, component states, and interaction guidance into production-ready iOS implementation.
• Improve developer experience for consuming teams through documentation, examples, onboarding, contribution guidance, support, and migration tooling.
• Collaborate with design, accessibility, product engineering, and platform peers to keep DDS implementation aligned across iOS, Android, React Native, and Web.
• Use AI-assisted engineering tools responsibly where they improve quality, speed, consistency, or developer self-service.
• Help make DDS documentation and component metadata more useful to humans and AI agents through MCP-ready context, examples, and clear constraints.
• Lead through senior engineering craft: architectural judgment, code review, mentoring, pragmatic delivery, technical clarity, and high-quality communication.
• Relocation Help - professional service to secure relevant working permits and other necessary documents
• Learning opportunities - certified technical training and learning platforms like Udemy, Pluralsight, and O'Reilly
• Learning culture and excellent opportunities to develop your career within your chosen field or something altogether new
• Varied and exciting projects to play a part in - there is always something new and exciting in the pipeline

Whats in it for you?

• 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 (12 months service required at qualifying date) 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.

The above information is a shortened summary, refer to our policies for full details

About Us

You might know us as a supermarket, technology company or even for our award-winning mobile network. Truth is, we're all of those things, and much more. Our colleagues work with one goal in mind, helping to make every day a little better for our customers, colleagues and communities all over the world. No two customers are the same, neither are our colleagues.

At Tesco, we champion a balance that lets you thrive both in and out of work. Spend 60% of your week collaborating with colleagues at our office locations or local sites and the rest remotely. Whether you're just kicking off your career, juggling passions, or navigating big life events, we're here to support you. We always welcome a conversation about flexible working, so talk to us throughout your application about how we can support.

We're proud to be an accredited Disability Confident Leader, where everyone’s welcome. That’s why we commit to providing a fully inclusive and accessible recruitment process. And if you're interested in joining our team but don't tick every box, don't let that hold you back from applying.