Senior Android Engineer

**Contracting often means being dropped into a client's team as the outsider.** Here you'll join a hedgehog lab team delivering a UK bank's Android app as it moves to Jetpack Compose. It's a contract outside IR35, expected to start in January 2027 and run for around 6 months. You'll work on a remote first basis. **What's in it for you** You'll be part of a consultancy team that owns the delivery, working with people who care about testing, code reviews and code quality. You'll build new UI in Compose from the start, on a codebase that's actively modernising. You'll add regulated banking work to your CV, which carries weight on future contracts. **Who you'll be doing it for** hedgehog lab is a digital product consultancy with 20 years of experience helping public and private sector organisations through digital transformation. We're B Corp and Great Place to Work certified. You'll be part of a hedgehog lab delivery team working on our client's customer-facing Android app. Our client is a well-known UK bank. **What you'll be doing** - Building new features and screens in Jetpack Compose - Maintaining XML and Data Binding screens and migrating them to Compose - Working in Kotlin, with some legacy Java, within an MVVM architecture using Hilt and Dagger - Consuming REST APIs and maintaining third-party SDKs - Writing unit tests with JUnit and MockK so changes and refactors stay safe - Debugging on emulators and real devices, including performance issues - Reviewing pull requests and taking part in sprint planning, stand-ups and retros **Experience you must have** - Commercial Android experience in Kotlin, including Coroutines and Flow - Jetpack Compose, plus XML layouts, Data Binding and enough Java to work on older code - MVVM and dependency injection with Hilt and Dagger - Unit testing with JUnit and MockK, and using tests to make safe changes in large codebases - Mobile security, particularly protecting sensitive data and securing network calls **Experience that's nice to have** - Banking, fintech or other regulated apps - SAFe or another scaled agile framework - Migrating XML screens to Compose - UI testing with Espresso or Compose - Certificate pinning, code obfuscation and root detection - Accessibility experience **How to apply** If this sounds like you, apply below and we'll be in touch.