IT & Software

iOS Engineer

ASOS

London · Greater London · United Kingdom

Overview

In this role you will own analytics and experimentation instrumentation in the iOS apps, ensuring reliable, well-governed data at scale. You’ll work with product, analytics, and data teams across ASOS to deliver trustworthy event data for millions of users. You’ll contribute to a mature platform, upholding quality and user experience while acting as the iOS voice within a cross-functional engineering group. This is a hands-on, impact-driven position that shapes how customer behavior is captured and analyzed.

Pay / Benefits
  • competitive salary
  • pension
  • private medical care
  • performance-related bonus
  • flex benefits allowance
  • 25 days paid annual leave + birthday
Responsibilities
  • Implement and maintain analytics event tracking in the iOS app following best practices and platform guidelines
  • Collaborate with product managers, analysts and data engineers to translate event specs into instrumentation and ensure schema compliance
  • Review PRs and help other iOS teams validate their events within the inner source model
  • Investigate and resolve data quality issues and drive permanent fixes
  • Support experimentation on iOS, including Optimizely SDK integration and experiment exposure
  • Ensure code quality, maintainability, and testing to keep tracking changes safe and reliable
Key requirements
  • Experience building iOS apps with Swift and core iOS frameworks
  • Experience integrating third-party analytics SDKs (e.g., Mixpanel, Optimizely) or ability to learn quickly
  • Understanding of event batching, queuing, and trade-offs for data completeness, battery, and network
  • Familiarity with software design patterns and maintainable instrumentation
  • Interest in writing clean, maintainable code and improving codebases
  • Awareness of privacy and consent requirements for mobile tracking
  • Comfort debugging data problems, inspecting payloads, and working with analysts to verify fixes (SQL/Databricks a bonus)
  • Familiarity with unit testing and willingness to contribute to test coverage
  • Experience with UI automation tools
  • Collaborative cross-functional teamwork
  • Attention to data quality and detail
  • Clear communication of technical concepts
  • Swift and modern iOS development
  • Analytics instrumentation and event schemas
  • Third-party analytics SDKs (Mixpanel, Optimizely)

Reference: WJ-747_30142855

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