iOS Engineer

We're ASOS. We blend our flair for fashion with our love of cutting- edge technology, but more importantly were interested in how we can bring the best out of you. 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.

We're looking for a Mid-level iOS Engineer to join our Analytics & Experimentation Product Delivery Team and own how customer behavior is captured in our iPhone and iPad apps. This role is about building reliable, well‑governed analytics and experimentation instrumentation at scale, and working collaboratively with product and engineering teams across ASOS to make the data they depend on trustworthy.

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 — and you'll be the iOS voice in a team that spans web, Android, back-end and analytics engineering.

What you'll be doing

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Mixpanel, Optimizely) or a strong appetite to pick this up An understanding of how mobile events are batched, queued and flushed, and the trade‑offs between data completeness, battery and network performance Knowledge of common software design patterns and architecture concepts, and an interest in designing instrumentation that's consistent and easy for other teams to adopt An interest in writing clear, maintainable code and improving existing codebases Awareness of privacy and consent requirements and how they apply to customer tracking on mobile Comfortable debugging data problems as well as code inspecting payloads, comparing against expected output, and working with analysts to confirm a fix (SQL or Databricks familiarity is a bonus, not a must) Familiarity with unit testing and a willingness to contribute to test coverage Experience with UI automation tools What's in it for you?

) Tech Develops - our internal tech focussed skills development programme to focus on your personal growth as a technologist Opportunity to represent ASOS at industry leading events Opportunity to help shape and drive our DE&I initiatives in Tech (like our WIT movement and Diversity mentoring in Tech) Opportunity to make an impact from day one and work with the latest in cutting edge of technology