Senior iOS Engineer

ASOS.com; Greater London; On-site; GBP 60,000 - 80,000; Full time

Benefits offered by this job

Employee discount

Employee sample sales

25 days paid annual leave

Discretionary bonus scheme

Private medical care scheme

Flexible benefits allowance

Job summary

ASOS.com is looking for a Senior iOS Engineer to enhance our Customer Experience team and contribute to the success of our iPhone and iPad apps. The role involves delivering high-quality experiences using modern iOS technologies at scale for over 8 million global users.

Key responsibilities include collaborating with designers, contributing to the codebase, and ensuring a reliable user experience. Benefits include employee discounts, 25 days of annual leave, and flexible allowance for additional perks.

Qualifications

• Experience building iOS applications using Swift and core iOS frameworks.
• Comfortable working with Xcode and Auto Layout.
• Understanding of Apple’s Human Interface Guidelines.

Responsibilities

• Deliver high-quality features following iOS best practices.
• Collaborate with designers for accessible user interfaces.
• Support code quality and testing.

Skills

iOS application development

Swift

Xcode

User Interface Design

Code Maintainability

Unit Testing

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.

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.

Job Description

We’re looking for a Senior iOS Engineer to join our Customer Experience team and help continue the success of our iPhone and iPad apps. This role is about delivering high‑quality, thoughtfully built experiences at scale, and working collaboratively to make products that customers genuinely value.

Our app is used by over 8 million active users globally, maintains an excellent App Store rating, and is built using modern iOS technologies including the latest versions of Swift. You’ll be contributing to a mature, well‑supported platform where quality, reliability and user experience matter.

What you’ll be doing

• Delivering high‑quality features and improvements, following iOS best practices and platform guidelines
• Working closely with designers to implement clear, accessible and well‑crafted user interfaces
• Collaborating within an agile, cross‑functional team, sharing responsibility for team outcomes
• Taking ownership of your work while contributing ideas and improvements across the codebase
• Supporting code quality, maintainability and testing to ensure a reliable user experience

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