Senior Android Engineer (Contract, Outside Ir35)

Hedgehog Lab; Manchester; Remote; GBP 92,000 - 129,000; Part time

Benefits offered by this job

Remote first

Outside IR35 contract

Job summary

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 join our delivery team working on a UK bank's Android app, delivering modern UI with Jetpack Compose while migrating from XML, in a remote-first environment.

Qualifications

• Commercial Android experience in Kotlin with Coroutines and Flow.
• Jetpack Compose as well as XML layouts, Data Binding and enough Java to work on older code.
• MVVM architecture and dependency injection with Hilt and Dagger.
• Unit testing with JUnit and MockK; ensure safe changes in large codebases.
• Mobile security, particularly protecting data and securing network calls.

Responsibilities

• Build new features and screens in Jetpack Compose.
• Migrate XML and Data Binding screens to Compose.
• Work in Kotlin, with some legacy Java, within an MVVM architecture using Hilt and Dagger.
• Consume REST APIs and maintain third-party SDKs.
• Write unit tests with JUnit and MockK; review PRs and participate in sprint events.

Skills

Android development (Kotlin)

Jetpack Compose

MVVM architecture

Unit testing (JUnit, MockK)

REST APIs

Dependency injection (Hilt/Dagger)

Code reviews

Tools

Hilt

Dagger

JUnit

MockK

Android SDK

Job description

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