Senior iOS Engineer (Contract, Outside IR35)

Come and join the hedgehog lab team for a six-month contract on a well-known UK bank's iOS app, with a Principal and another Senior iOS Engineer alongside you from day one.

The contract

Six-month contract, starting 5 January 2027.

Outside IR35.

Remote first, with some time on site.


Why you'll want this

A lot of iOS 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 work alongside a Principal iOS Engineer and another Senior, so there's always someone to pair with or test your thinking.

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

You'll have a say in where the app's architecture goes next.

With a 5th 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 iOS 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 features and refactoring in small steps, with tests protecting existing behaviour.

Writing unit tests, using dependency injection and mocking.

Handling sensitive data securely, from storage to networking.

Investigating defects and performance problems, including memory leaks, responsiveness and network behaviour.

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


What you'll need

Commercial iOS experience with Swift, and a sound grasp of core iOS frameworks.

Experience working within the architecture of a large, established codebase, using patterns such as MVVM, MVC or Clean Swift.

Unit testing experience, including mocking, dependency injection and asynchronous code.

Practical mobile security knowledge, including secure storage, secure networking and certificate pinning.

Confidence debugging memory, CPU and network issues.

It would help if you've worked on banking, fintech or other regulated apps, or brought Swift Concurrency or SwiftUI into an existing app.


Next steps

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