Senior iOS Engineer

Starling is the UK's first and leading digital bank on a mission to fix banking. We built a new kind of bank because we knew technology had the power to help people save, spend and manage their money in a new and transformative way. We're a fully licensed UK bank with the culture and spirit of a fast-moving, disruptive tech company. We employ more than 3,000 people across our London, Southampton, Cardiff and Manchester offices.

Our technologists are at the heart of Starling and enjoy working in a fast-paced environment that is about building things, creating new stuff, and disruptive technology that keeps us on the cutting edge of fintech. We operate a flat structure to empower you to make decisions regardless of your primary responsibilities; innovation and collaboration are core to everything you do. Help is always available in our open culture, and we are in this together.

The way to thrive and shine within Starling is to be a self-driven individual who can take full ownership of building things, designing, discovering, and sharing knowledge with colleagues to ensure processes are efficient and productive to deliver the best possible results for our customers. Our purpose is underpinned by five Starling 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 Starling. Our preference is that you're located within a commutable distance of one of our offices so that we're able to interact and collaborate in person. In Technology, we ask that you attend the office a minimum of 1 day per week.

Engineering Environment

Starling engineers are excited about delivering new features, regardless of their primary tech stack. We are looking for engineers at all levels to join the team. We value people who are engaged, care about customers, care about the code they write, and contribute to Starling. People with a broad ability to apply themselves to a multitude of problems who can work across teams do great things here at Starling, continuing to change banking for good. We have built our entire banking platform in house, mostly in Java, and we are looking for people who want to work on building the tooling used by our engineers daily.

Our mobile engineers work in cross-functional feature teams across broader engineering groups. You are empowered to make the decisions necessary for the platform and to provide insight to team leads on projects. You’ll be working closely with other mobile engineers with a variety of experience levels and interests. Expect to be committing, reviewing and shipping new code from the first week.

Requirements

As a fully digital bank, we are looking for engineers who understand and prioritise security when implementing features, fixing bugs, or making technical improvements across all layers. Our team designs, builds and releases new screens daily, so we are interested in people with a focus on Accessibility along with writing clean and maintainable code.

Our application is in the top chart of finance apps in the UK, with over 300K ratings and an average rating of 4.9. Our iOS application is entirely written in Swift and highly modular, using MVVM-C to maximise code reusability and testing. We value simplicity over complexity—fewer moving parts means fewer faults and easier comprehension.

Some of the well-known frameworks and tools we use:

• RxSwift – reactive programming framework
• SnapKit – auto layout DSL (in-house framework on top of SnapKit for declarative, SwiftUI-like layout code for UIKit)
• Realm – main persistence layer
• Sourcery and SwiftGen – code generation tasks
• SwiftFormat, SwiftLint and Danger – to enforce high code quality standards

We also built in-house tools and frameworks as developer productivity and automation are 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 provides reliability for customers
• Care about the product, user experience and design
• Believe that a small number of empowered developers is the right way to deliver software
• Have experience with UIKit and understand its concepts and components
• RxSwift experience is a plus but not required

Interview process

Interviewing is a two-way process; we want you to get to know us as much as we are getting to know you. Our interviews are conversational. You can expect the following, following a chat with our Talent Team:

• First interview: ~45 minutes
• Take-home technical test (no time limit)
• Technical face-to-face: ~1.5 hours
• Final Interview: ~45 minutes

Benefits

• 25 days holiday (plus public holiday allowance)
• An extra day off for your birthday
• Annual leave increases with length of service; option to buy or sell up to five extra days
• 16 hours paid volunteering time per year
• Salary sacrifice, company enhanced pension scheme
• Life insurance at 4x salary & group income protection
• Private Medical Insurance with VitalityHealth, including mental health support and cancer care; partner benefits include discounts with Waitrose, Mr&Mrs Smith and Peloton
• Generous family-friendly policies
• Refer-a-friend incentives
• Perkbox membership with retail discounts and wellness platform
• Cycle to Work, Salary Sacrificed Gym partnerships and EV leasing initiatives

About Us

You may be put off applying for a role if you don’t tick every box. We’re open to discussion about flexible working. We’re on a mission to reshape banking and bring together people of all backgrounds and experiences who love solving problems. Starling is an equal opportunity employer. We do not discriminate on race, religion, national origin, age, sex, gender, gender identity, gender expression, sexual orientation, marital status, medical condition, disability, military or veteran status, or any other characteristic protected by applicable law.

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