iOS Analytics & Experimentation Engineer

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

Benefits offered by this job

Competitive salary

Pension

Private medical care

Performance bonus

Flex benefits allowance

ASOS employee discount

Tech Develops program

Industry events

DE&I in Tech

Birthday leave

Job summary

ASOS.com is seeking a mid‑level iOS Engineer to own analytics instrumentation for our iPhone and iPad apps, building reliable tracking and experiments at scale while collaborating with product and engineering teams.

You will shape data quality across ASOS’s apps, work with analytics, data engineers and other iOS teams, and contribute to a mature platform with modern Swift and a strong focus on user experience.

Qualifications

• Experience building iOS applications using Swift and the core iOS frameworks.
• Experience integrating third‑party SDKs into production iOS app analytics, experimentation or similar (e.g. Mixpanel, Optimizely) or a strong appetite to pick this up.
• Understanding of how mobile events are batched, queued and flushed, and trade‑offs between data completeness, battery and network perf.
• Knowledge of common software design patterns and architecture concepts; interest in instrumentation that's easy for other teams to adopt.
• Interest in writing clear, maintainable code and improving existing codebases.
• Awareness of privacy and consent requirements for customer tracking on mobile.
• Comfortable debugging data problems and inspecting payloads; SQL or Databricks familiarity is a bonus.
• Familiarity with unit testing and willingness to contribute to test coverage.
• Experience with UI automation tools.

Responsibilities

• Implementing and maintaining analytics event tracking in the iOS app following iOS best practices and platform guidelines.
• Translating event specs into instrumentation and ensuring events conform to schemas and data contracts.
• Collaborating within an agile, cross‑functional team and supporting other iOS teams contributing tracking.
• Investigating and resolving data quality issues and delivering permanent fixes.
• Supporting experimentation on iOS, including Optimizely integration and experiment exposure.
• Supporting code quality, maintainability and testing to ship tracking changes safely.

Skills

Swift

iOS frameworks

Analytics & Experimentation

Unit testing

UI automation

SQL

Databricks

Mixpanel

Optimizely

Tools

Mixpanel

Optimizely

SQL

Databricks

Job description

ASOS.com is seeking a mid‑level iOS Engineer to own analytics instrumentation for our iPhone and iPad apps, building reliable tracking and experiments at scale while collaborating with product and engineering teams.

You will shape data quality across ASOS’s apps, work with analytics, data engineers and other iOS teams, and contribute to a mature platform with modern Swift and a strong focus on user experience.