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IOS Engineer - Engine

Job in Greater London, London, Greater London, England, UK
Listing for: Starling
Full Time position
Listed on 2025-12-01
Job specializations:
  • Software Development
    Software Engineer, App Developer - Mobile/Web
Job Description & How to Apply Below
Position: iOS Engineer - Engine by Starling
Location: Greater London

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At Engine by Starling, we are on a mission to find and work with leading banks all around the world who have the ambition to build rapid growth businesses, on our technology.

Engine is Starling's software-as-a-service (SaaS) business, the technology that was built to power Starling, and two years ago we split out as a separate business.

Starling has seen exceptional growth and success, and a large part of that is down to the fact that we have built our own modern technology from the ground up. This SaaS technology platform is now available to banks and financial institutions all around the world, enabling them to benefit from the innovative digital features, and efficient back-office processes that has helped achieve Starling's success.

As a company, everyone is expected to roll up their sleeves to help deliver great outcomes for our clients. We are an engineering led company and we're looking for people who will be excited by the potential for Engine's technology to transform banking in different markets around the world. Our purpose is underpinned by five values:
Listen, Keep It Simple, Do The Right Thing, Own It, and Aim For Greatness.

Hybrid Working

We have a Hybrid approach to working here at Engine - our preference is that you're located within a commutable distance of our offices so that we're able to interact and collaborate in person.

About Engineering at Engine by Starling

We’re looking for iOS Engineers to work on the Engine Platform and make our existing features work for banks all over the world as well as building new features from scratch that Starling hasn’t released in the UK market.

Engine by Starling engineers are excited about helping us deliver new features, regardless of what their primary tech stack may be. Hear more from the team in some case studies below, and our work with Women In Tech.

  • Day in the Life of a Mobile Engineer
  • Working as a Mobile QA
  • Leading the Android Team
  • Engine by Starling Careers Page

We are looking for engineers at all levels to join the team. We value people being engaged and caring about customers, caring about the code they write and the contribution they can make to banking around the world. People with a broad ability to apply themselves to a multitude of problems and challenges, who can work across teams do great things here at Engine, to continue changing banking for good.

As

an Engineer you will:
  • Contribute to our award winning platform and internal tooling
  • Build new features and products from scratch in a configurable way
  • Share your knowledge with those around you, contributing to our learning culture
  • Own your projects, working in small teams across the bank to collaboratively deliver
  • Aim for greatness in everything you do, staying curious and inquisitive
  • Be part of a scaling team and organisation as we change banking for good
Requirements

Our iOS application is entirely written in Swift. It is highly modular and we use MVVM-C architecture to maximise code reusability and testing. We also value simplicity over complexity, fewer moving parts means fewer faults and easier comprehension.

Some of the well known frameworks and tools we use:

  • RxSwift - as our reactive programming framework;
  • Snap Kit - as our auto layout DSL, though we have an in-house framework built on top of Snap Kit which allows us to write declarative, Swift

    UI like layout code for UIKit
  • Realm - as the application main persistence layer;
  • Sourcery and Swift Gen - for various code generation tasks
  • Swift Format, Swift Lint and Danger - to enforce high code quality standards
  • etc

We also built in-house tools and frameworks as developer productivity and automation is paramount to us.

We are looking for iOS engineers to work on these apps who:

  • Want to work on a feature rich mobile app with millions of customers;
  • Can produce robust, well tested code that will give our customers the reliability that they need;
  • Care about the product, the user experience and the design;
  • Think (like us) that a small number of empowered developers is the right way to deliver software;
  • Our application is built with UIKit, knowing its…
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