Senior iOS Engineer

We’re ASOS, the online retailer for fashion lovers all around the world.

We exist to give our customers the confidence to be whoever they want to be, and that goes for our people too. At ASOS, you’re free to be your true self without judgement, and channel your creativity into a platform used by millions.

But how are we showing up? We’re proud members of Inclusive Companies, are Disability Confident Committed and have signed the Business in the Community Race at Work Charter and we placed 8th in the Inclusive Top 50 Companies Employer list.

Everyone needs some help showing up as their best self. Let our Talent team know if you need any adjustments throughout the process in whatever way works best for you.

We're looking for a Senior iOS Engineer to join our Customer Experience team and help shape the future of one of the UK's most recognisable retail apps.

At ASOS, you'll build experiences used by more than 8 million active customers worldwide, delivering features that directly impact how millions of people discover, shop and engage with fashion every day. Our iPhone and iPad apps maintain excellent App Store ratings and are built using modern iOS technologies, including the latest versions of Swift.

This is an opportunity to work at genuine scale, solving complex engineering challenges while collaborating with talented product, design and engineering teams. You'll have the freedom to influence technical decisions, contribute to the evolution of our platform, and help create experiences customers genuinely love.

What you'll be doing

Building and delivering high-quality customer experiences used by millions of customers globally.

Developing features using modern iOS technologies and engineering best practices, balancing quality, performance and scalability.

Partnering closely with Product, Design and fellow Engineers to shape solutions from idea through to launch.

Contributing to technical discussions, architectural decisions and continuous improvements across our iOS platform.

Taking ownership of features and services, helping ensure reliability, maintainability and a seamless customer experience.

Mentoring and supporting other engineers, sharing knowledge and helping raise engineering standards across the team.

Using data, experimentation and customer insights to inform decisions and continuously improve the app experience.

Why this role is exciting

Your work will reach millions of customers around the world.

You'll join a high-performing mobile engineering team with a strong focus on quality and craftsmanship.

You'll work with modern technologies and contribute to the future direction of our iOS platform.

You'll have real influence over technical decisions, product outcomes and customer experience.

You'll help shape the next generation of shopping experiences for one of the world's leading fashion destinations.

About you

Experience building iOS applications using Swift and the core iOS frameworks

Comfortable working with Xcode, Interface Builder and Auto Layout to create responsive user interfaces

Understanding of Apple’s Human Interface Guidelines and platform design principles

Knowledge of common software design patterns and architecture concepts

An interest in writing clear, maintainable code and improving existing codebases

Experience building apps that work well across iPhone and iPad screen sizes

Familiarity with unit testing and a willingness to contribute to test coverage

Experience with UI automation tools, or a desire to learn them

BeneFITS’

Employee discount (hello ASOS discount!)

Employee sample sales

25 days paid annual leave + an extra celebration day for a special moment

Discretionary bonus scheme

Private medical care scheme

Flexible benefits allowance - which you can choose to take as extra cash, or use towards other benefits

Opportunity for personalised learning and in-the-moment experiences that enable you to thrive and excel in your role