Senior iOS Engineer

Posted Yesterday
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London, England, GBR
Hybrid
Senior level
eCommerce • Retail
The Role
Build and deliver high-quality iOS experiences used by millions of customers. Develop scalable features with Swift and modern iOS technologies, collaborate with product and design teams, contribute to architecture and technical decisions, improve platform reliability and maintainability, mentor engineers, and use experimentation and customer insights to enhance the app experience.
Summary Generated by Built In
Company 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 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.

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

Skills Required

  • Experience building iOS applications using Swift and core iOS frameworks
  • Experience with Xcode, Interface Builder, and Auto Layout
  • Understanding of Apple's Human Interface Guidelines and platform design principles
  • Knowledge of common software design patterns and architecture concepts
  • Ability to write clear, maintainable code and improve existing codebases
  • Experience building apps across iPhone and iPad screen sizes
  • Familiarity with unit testing
  • Experience with UI automation tools or willingness to learn them

ASOS Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about ASOS and has not been reviewed or approved by ASOS.

  • Wellbeing & Lifestyle Benefits Feedback suggests perks like a sizable, shareable product discount, access to sample sales, free gym access, and on-site amenities are valued. Such lifestyle-oriented benefits are frequently highlighted as standout aspects of the package.
  • Leave & Time Off Breadth Feedback suggests employees benefit from substantial annual leave with bank holidays and an extra celebratory or birthday day off, with summer early finishes referenced in some contexts. This breadth of time-off options supports work-life balance.
  • Healthcare Strength Feedback suggests access to a private medical care scheme is a core part of the package. This contributes to a perception of strong healthcare support.

ASOS Insights

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The Company
HQ: London
3,200 Employees
Year Founded: 2000

What We Do

We exist to give people 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 judgment, and channel your creativity into a platform used by millions. Whatever your role, asos will encourage you to be you, fulfilling your creative potential with our global reach. Push boundaries, and challenge expectations. We’re determined to succeed, so we’ll trust you to deliver. Help drive our journey to becoming the global fashion destination for 20-somethings At ASOS our 3,000+ employees are immersed in the creative worlds and have a truly entrepreneurial attitude. Our ASOSers are authentic, brave, creative and disciplined to the core and find ways to blend our passion for fashion with cutting edge technology. Sound up your street? Join us.

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