Senior Android Engineer at Hedgehog Lab, Mostly Remote, 6 Months, £Contract Rate (Outside IR35)

Come and join the hedgehog lab team for a six-month contract on a well-known UK bank's Android app, building all new UI in Jetpack Compose from day one.

The contract

Six-month contract, starting 5th January 2027.

Outside IR35.

Remote first, with some time on site.


Why you'll want this

A lot of Android contracts drop you into a client team on your own, picking up their ways of working while you try to deliver.

On this one you'll join a hedgehog lab team, working on a banking app customers use every day.


What's in it for you

You'll get to do a Compose migration properly, moving older XML screens across in small, tested steps.

You'll be the team's Android specialist, working alongside iOS engineers and QAs.

You'll have room to do the work properly and fix problems at the source.

With a 5 January start, you can line up your next contract before Christmas.


Who you'll be doing it for

hedgehog lab is a digital product consultancy with 20 years of experience. We're B Corp and Great Place to Work certified, with around 100 people working remote first across the UK.

This engagement is with a well-known UK bank, on its customer-facing Android app. Our team will be a Principal iOS Engineer, two Senior iOS Engineers, a Senior Android Engineer and two QAs.


What you'll be doing

Building new features and screens in Compose.

Maintaining existing XML and Data Binding screens, and moving them to Compose over time.

Working in Kotlin and some Java, within an MVVM architecture using Hilt and Dagger.

Consuming REST APIs and maintaining third-party SDKs.

Writing unit tests with JUnit and MockK to support safe refactoring.

Debugging on emulators and real devices, including memory, performance and network issues.

Reviewing code and working closely with the bank's own mobile engineers.


What you'll need

Commercial Android experience with Kotlin, Coroutines and Flow, plus enough Java to maintain older code.

Jetpack Compose experience, alongside XML layouts and Data Binding.

A good understanding of MVVM, SOLID principles and dependency injection with Hilt or Dagger.

Unit testing with JUnit and MockK, including asynchronous code.

Experience making incremental changes in a large, established codebase.

Experience with REST APIs and third-party SDKs.

Practical mobile security awareness, especially protecting sensitive data and communicating securely with services.

It would help if you've migrated XML screens to Compose, written Espresso or Compose UI tests, or worked on banking, fintech or other regulated apps.


Next steps

If this sounds like your next contract, apply and I'll be in touch to arrange a call.