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iOS Engineer - Engine by Starling - job 1 of 2

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 Bank, and a year ago we split out as a separate business. 

Starling Bank 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.

Our technologists are at the very heart of Engine and enjoy working in a fast-paced environment that is all 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 what your primary responsibilities may be, innovation and collaboration will be at the core of everything you do. Help is never far away in our open culture, you will find support in your team and from across the business, we are in this together!

The way to thrive and shine within Engine is to be a self-driven individual and be able to take full ownership of everything around you: From building things, designing, and discovering to sharing knowledge with your colleagues and making sure all processes are efficient and productive to deliver the best possible results for our customers. 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 - https://www.enginebystarling.com/

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.

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

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;
  • SnapKit - as our auto layout DSL, though we have an in-house framework built on top of SnapKit which allows us to write declarative, SwiftUI like layout code for UIKit.
  • Realm - as the application main persistence layer;
  • Sourcery and SwiftGen - for various code generation tasks.
  • SwiftFormat, SwiftLint 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 concepts and components is a must.
  • We use RxSwift in our project, experience with reactive programming will be a plus but is not required.

Interview process

Interviewing is a two way process and we want you to have the time and opportunity to get to know us, as much as we are getting to know you! Our interviews are conversational and we want to get the best from you, so come with questions and be curious. In general you can expect the below, following a chat with one of our Talent Team:

  • First interview: ~45 minutes
  • Take home technical test (no time limit)
  • Technical face to face: ~2 hours
  • Final Interview: ~45 minutes
  • 33 days holiday (including public holidays, which you can take when it works best for you)
  • An extra day’s holiday for your birthday
  • Annual leave is increased with length of service, and you can choose to buy or sell up to five extra days off
  • 16 hours paid volunteering time a year
  • Salary sacrifice, company enhanced pension scheme
  • Life insurance at 4x your 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
  • Incentives refer a friend scheme
  • Perkbox membership giving access to retail discounts, a wellness platform for physical and mental health, and weekly free and boosted perks
  • Access to initiatives like Cycle to Work, Salary Sacrificed Gym partnerships and Electric Vehicle (EV) leasing

About Us

You may be put off applying for a role because you don't tick every box. Forget that! While we can’t accommodate every flexible working request, we're always open to discussion. So, if you're excited about working with us, but aren’t sure if you're 100% there yet, get in touch anyway. We’re on a mission to radically reshape banking – and that starts with our brilliant team. Whatever came before, we’re proud to bring together people of all backgrounds and experiences who love working together to solve problems.

Engine by Starling is an equal opportunity employer, and we’re proud of our ongoing efforts to foster diversity & inclusion in the workplace. Individuals seeking employment at Engine by Starling are considered without regard to race, religion, national origin, age, sex, gender, gender identity, gender expression, sexual orientation, marital status, medical condition, ancestry, physical or mental disability, military or veteran status, or any other characteristic protected by applicable law. 

When you provide us with this information, you are doing so at your own consent, with full knowledge that we will process this personal data in accordance with our Privacy Notice. By submitting your application, you agree that Engine by Starling and Starling Bank will collect your personal data for recruiting and related purposes. Our Privacy Notice explains what personal information we will process, where we will process your personal information, its purposes for processing your personal information, and the rights you can exercise over our use of your personal information.

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What You Should Know About iOS Engineer - Engine by Starling, Starling Bank

Are you ready to embark on an exciting journey as an iOS Engineer with Engine by Starling? At Engine, we're dedicated to transforming the banking landscape with our innovative technology, which has already proven successful with Starling Bank. In this role, you'll be at the heart of our mission, building features that empower banks globally. Whether you're enhancing existing functionalities or creating something entirely new from scratch, your work will directly impact millions of users. We love working with passionate individuals who thrive in a collaborative, fast-paced environment—where no idea is too bold, and every team member’s voice is heard. Your responsibilities will include producing well-tested and robust code, contributing to our valued learning culture, and taking ownership of projects alongside a supportive team. Our iOS app is built using Swift within a modular MVVM-C architecture to ensure efficiency and simplicity, and we value high-quality standards with tools like RxSwift and SnapKit. If you're someone who finds excitement in crafting quality mobile applications and enjoys diving deep into user experiences, then Engine by Starling is the perfect place for you. Join us as we innovate and reshape the future of banking!

Frequently Asked Questions (FAQs) for iOS Engineer - Engine by Starling Role at Starling Bank
What are the key responsibilities of an iOS Engineer at Engine by Starling?

As an iOS Engineer at Engine by Starling, your key responsibilities will involve building and enhancing features for our mobile app, developing new functionalities tailored for banks worldwide, and ensuring code quality through robust testing practices. You'll collaborate closely with team members, share knowledge, and take ownership of various projects that drive innovation across our tech platform.

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What qualifications are required for the iOS Engineer position at Engine by Starling?

The ideal candidate for the iOS Engineer role at Engine by Starling should have a strong foundation in Swift programming and familiarity with the iOS app development lifecycle. While experience with RxSwift and reactive programming is beneficial, it is not mandatory. A passion for creating user-centric mobile experiences and a commitment to writing high-quality, maintainable code are essential.

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What is the working culture like for an iOS Engineer at Engine by Starling?

Engine by Starling promotes a flat organizational structure that fosters collaboration and innovation. As an iOS Engineer, you can expect an open culture where support is readily available, and every team member is encouraged to contribute ideas and take initiative. Our focus is on teamwork and achieving greatness through shared learning and development.

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How does the interview process work for the iOS Engineer position at Engine by Starling?

The interview process at Engine by Starling is designed to be conversational and engaging. It typically consists of a first interview lasting around 45 minutes, followed by a take-home technical test with no time limit. Successful candidates will then proceed to a technical face-to-face interview, which lasts about two hours, and a final interview of approximately 45 minutes.

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What benefits can an iOS Engineer expect when working at Engine by Starling?

As an iOS Engineer at Engine by Starling, you can expect a fantastic range of benefits. This includes 33 days of holiday per year, enhanced family-friendly policies, participation in a generous pension scheme, private medical insurance, and opportunities for personal development through paid volunteering time. You'll also enjoy perks like access to wellness platforms and discounts with renowned brands.

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Common Interview Questions for iOS Engineer - Engine by Starling
Can you describe your experience with Swift and iOS development?

When answering this question, provide specific examples of projects you've worked on using Swift. Highlight your familiarity with iOS frameworks, libraries you've utilized, and any design patterns you've implemented. Discuss challenges you've faced and how you overcame them to demonstrate your problem-solving skills.

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How do you ensure your code is maintainable and scalable?

To answer effectively, mention your use of design principles such as Clean Code and SOLID principles. Talk about how you write modular code, implement code reviews, and use version control. Touch on your familiarity with testing methodologies, emphasizing automated tests as a means to maintain code quality.

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Describe a time you faced a difficult bug. How did you handle it?

Frame your answer by using the STAR method (Situation, Task, Action, Result). Describe the context of the bug, the specific challenges it posed, the steps you took to identify and fix the issue, and the positive outcome of your efforts, particularly highlighting any collaboration with team members.

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What tools or frameworks do you prefer for iOS development?

Share your preferred tools and frameworks, explaining why you use them. For instance, discuss your experience with RxSwift for reactive programming, SnapKit for layout, or Realm for data persistence. Highlight how these tools help you improve efficiency in your development process.

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How do you prioritize your tasks when working on multiple features?

Explain your approach to task prioritization, such as using Agile methodologies like Scrum or Kanban. Detail how you assess feature importance through stakeholder input and user feedback, and mention time management techniques you implement to meet deadlines effectively.

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What is your approach to collaborating with cross-functional teams?

Discuss the importance of communication in collaborative environments. Share examples of how you've worked with product managers, designers, and other engineers to align on goals, provide updates, and resolve issues. Emphasize your adaptability in accommodating different perspectives.

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Can you explain the MVVM-C architecture?

Provide a clear overview of the MVVM-C architecture, detailing how it separates concerns in your application. Explain how you've implemented this architecture in your projects, focusing on how it enhances code reusability, testing, and easier maintenance.

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How do you incorporate user feedback into your development process?

Discuss your methods for gathering user feedback, such as through surveys or analytics. Highlight how you apply this feedback to improve user experience, your workflow for implementing changes, and how you prioritize those adjustments in your development cycle.

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What strategies do you use to stay up-to-date with new iOS technologies?

Describe your continuous learning strategies, such as attending conferences, participating in online courses, or following relevant blogs and forums. Discuss how you apply new knowledge to your work, demonstrating your commitment to staying current in a fast-evolving field.

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Where do you see yourself in the next few years as an iOS Engineer?

Articulate a vision for your career growth, perhaps by mentioning aspirations to take on leadership roles, specialize in certain technologies, or mentor junior engineers. Highlight how your goals align with the innovative culture at Engine by Starling and their mission to reshape banking.

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Inclusive & Diverse
Rise from Within
Mission Driven
Diversity of Opinions
Work/Life Harmony
Transparent & Candid
Growth & Learning
Fast-Paced
Collaboration over Competition
Take Risks
Friends Outside of Work
Passion for Exploration
Customer-Centric
Reward & Recognition
Feedback Forward
Rapid Growth
Medical Insurance
Paid Time-Off
Maternity Leave
Mental Health Resources
Equity
Paternity Leave
Fully Distributed
Flex-Friendly
Some Meals Provided
Snacks
Social Gatherings
Pet Friendly
Company Retreats
Dental Insurance
Life insurance
Health Savings Account (HSA)

Our mission is to create a bank that guides and informs you towards better decisions. By giving you real-time insights, Starling enables you to understand your financial life in a whole new way.

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Full-time, hybrid
DATE POSTED
April 15, 2025

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