Senior Android Engineer – Mobile Security

About the role

We are looking for a Senior Android Engineer to join a high‑performing mobile engineering team within a major UK financial services organisation. The team is at the core of mobile security, building and maintaining cutting‑edge security components that protect millions of users across a multi‑brand environment.

Key responsibilities

• Design, build, and maintain secure Android components and libraries used across multiple applications.
• Contribute to mobile security architecture, standards, and best practices.
• Collaborate with engineering, architecture, and strategy teams to deliver scalable, reusable solutions.
• Support performance optimisation, testing, and continuous improvement of Android services.
• Help shape the future of mobile security on a large‑scale platform.

Required profile

• Strong experience with Kotlin and/or Java for Android development.
• Deep understanding of the Android SDK, UI principles, and best practices.
• Experience with offline storage, threading, and performance tuning.
• Proficiency in Android architecture patterns such as MVVM or MVI.
• Familiarity with modularised codebases and version control (Git).
• Experience with UI testing.
• Nice to have: background in security‑focused mobile applications and exposure to mobile app security practices.

Required skills

• Kotlin
• Java
• Android SDK
• Jetpack Compose
• Android Architecture Components
• MVVM / MVI patterns
• Git
• UI testing
• Offline storage
• Threading
• Performance tuning
• Modularised codebases
• Mobile app security (obfuscation, penetration‑testing support)

What we offer

• Competitive salary
• Hybrid working (London‑based)
• Opportunity to work on high‑impact mobile platforms used by millions
• Collaborative, forward‑thinking engineering environment