iOS Analytics & Experimentation Engineer

ASOS; Greater London; On-site; GBP 60,000 - 85,000; Full time

Benefits offered by this job

Employee discount

Private medical care

Job summary

ASOS is seeking a Mid-level iOS Engineer to own analytics and experimentation instrumentation in the iPhone and iPad apps. You will build reliable tracking, collaborate with product and engineering, and ensure data is trustworthy across ASOS’s global app used by millions.

Join a cross‑functional agile team, contribute to Optimizely integrations, and help shape data quality while delivering high‑quality user experiences on iOS.

Qualifications

• Experience building iOS apps with Swift and core frameworks.
• Experience integrating third‑party analytics SDKs into production iOS apps.
• Understanding of how mobile events are batched, queued and flushed, and trade‑offs between data completeness, battery and network usage.
• Knowledge of design patterns and architecture for instrumentation that is easy to adopt by other teams.
• Interest in writing clear, maintainable code and improving existing codebases.
• Awareness of privacy and consent requirements for customer tracking on mobile.
• Comfort debugging data problems and validating payloads with analysts (SQL/Databricks a bonus).
• Familiarity with unit testing and a willingness to contribute to test coverage.
• Experience with UI automation tools.

Responsibilities

• Implement and maintain analytics event tracking in the iOS app following iOS best practices and platform guidelines.
• Translate event specs into instrumentation and ensure events conform to schemas and data contracts.
• Collaborate within an agile, cross‑functional team and review PRs to validate events.
• Investigate and resolve data quality issues and own fixes through to permanent solutions.
• Support experimentation on iOS, including Optimizely integration and experiment exposure.
• Ensure code quality, maintainability, and testing to ship tracking changes safely and reliably.

Skills

Swift

iOS frameworks

Analytics instrumentation

SDK integration

Data privacy

Unit testing

UI automation

Agile teamwork

Data debugging

Maintainable code

Tools

Mixpanel

Optimizely

Databricks

SQL

Job description

ASOS is seeking a Mid-level iOS Engineer to own analytics and experimentation instrumentation in the iPhone and iPad apps. You will build reliable tracking, collaborate with product and engineering, and ensure data is trustworthy across ASOS’s global app used by millions.

Join a cross‑functional agile team, contribute to Optimizely integrations, and help shape data quality while delivering high‑quality user experiences on iOS.