iOS Engineer

ASOS.com; Greater London; On-site; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Employee discount

Sample sales

25 days leave

Discretionary bonus

Private medical care

Flexible benefits

Learning opportunities

Job summary

ASOS is seeking an iOS Engineer to join the Customer Experience team, building mobile experiences used by millions of customers worldwide. You’ll work on the UK’s iconic fashion app, using Swift, Xcode and modern iOS technologies in a collaborative, cross‑functional environment.

You’ll join engineers, product managers and designers to deliver features from concept to launch, maintaining performance, accessibility and maintainability as we scale our mobile platform.

Qualifications

• Experience building iOS apps with Swift and core frameworks.
• Proficient in Xcode, Interface Builder and Auto Layout.
• Follows Human Interface Guidelines and platform design principles.
• Willing to write clean, maintainable code and improve codebase.
• Experience with testing and test coverage.
• Experience across iPhone and iPad screen sizes.

Responsibilities

• Build high‑quality features for millions of customers.
• Develop scalable, reliable iOS apps with best practices.
• Collaborate with Product Managers, Designers and Engineers.
• Work in cross‑functional agile teams to deliver on ideas.
• Own your work and contribute ideas to improve products.
• Support quality, performance, accessibility and maintainability.
• Participate in evolving the iOS platform as we scale.
• Learn from experienced engineers and share knowledge.

Skills

Swift

iOS development

Xcode

UI design principles

Unit testing

UI automation

Architectural patterns

Testing culture

Tools

Xcode

Interface Builder

Auto Layout

Job description

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.

Everyone needs some help showing up as their best self. We're Disability Confident Committed - let our Talent team know if you need any reasonable adjustments throughout the recruitment process

Job Description

We're looking for an iOS Engineer to join our Customer Experience team and help build the mobile experiences that millions of customers use every day.

At ASOS, you'll work on one of the UK's most recognisable retail apps, helping over 8 million active customers discover products, stay inspired and shop seamlessly from anywhere. Our iPhone and iPad apps maintain excellent App Store ratings and are built using modern iOS technologies, including the latest versions of Swift.

You'll join a collaborative team of Engineers, Product Managers and Designers, working together to solve real customer problems and deliver experiences at scale. This is a great opportunity to grow your technical expertise, contribute to products with genuine business impact, and help shape the future of mobile commerce at ASOS.

What you'll be doing

• Building and delivering high-quality features that enhance the experience of millions of customers worldwide.
• Developing scalable, reliable and well-tested applications using modern iOS technologies and engineering best practices.
• Collaborating closely with Product Managers, Designers and Engineers to take ideas from concept through to launch.
• Working within agile, cross-functional teams to solve customer, business and technical challenges.
• Taking ownership of your work, contributing ideas and helping improve our products, processes and engineering practices.
• Supporting the quality, performance, accessibility and maintainability of our mobile applications.
• Contributing to technical discussions and helping evolve our iOS platform as we continue to scale.
• Learning from experienced engineers while sharing knowledge and collaborating across the wider engineering community.

Why join us?

• Build products used by millions of customers around the world.
• Work with modern iOS technologies, including the latest versions of Swift.
• Be part of a collaborative engineering culture that values quality, innovation and continuous improvement.
• Develop your skills through complex technical challenges, mentorship and exposure to large-scale systems.
• Have a direct impact on the experiences that shape how customers discover and shop fashion online.
• Join a team where your ideas are valued and your contributions make a visible difference.

Qualifications

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

Additional Information

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