iOS Engineer
monzoreferrals
Cardiff, London or Remote (UK) · Cardiff
Posted Oct 6, 2025
- Other
- Remote
- Engineering
monzoreferrals
Cardiff, London or Remote (UK) · Cardiff
Posted Oct 6, 2025
📍London/ UK remote | 💰 Engineer III £78,000 - £110,000 base salary per year ➕ share options | Benefits | Technology
About our Mobile Engineering discipline
Our mobile engineers have a variety of different backgrounds
There are ~60 iOS engineers at Monzo and we’re looking for more to join the team. We have several non-graduates; only some of us studied Computer Science; some of us have worked in huge companies; some have only ever worked in startups; others are former consultants. As long as you enjoy learning new things, we’d love to talk to you.
Monzo works in small, interdisciplinary teams
We have around 650 engineers out of roughly 5,500 people in total - and we have big ambitions. There are many interesting challenges ahead, and we're happy for people to move between teams or to specialise, whatever you prefer. As an engineer here you'd be able to work directly with anyone across the company, and we run regular knowledge-sharing sessions so you’ll learn heaps about everything from how banks work to effective communication.
We contribute to open source software as much as possible. Our blog is a good place to learn even more about what we do!
We’re searching for product-focused iOS engineers to evolve our native mobile app. You’ll take pride in building polished user experiences, and you’ll balance the need for well-tested resilient code with moving fast and iterating.
You’ll be working on a product that is a part of day to day life for more than 15 million people already, and your work here will shape the way that people interact with their finances.
As an iOS Engineer at Monzo you'll work in a small, autonomous product squad alongside Android Engineers, Backend Engineers, User Researchers, Product Designers, Product Managers, QA Testers, and Data Scientists.
You and your team will be responsible for an overall company goal, rather than building a specific feature - you'll have the opportunity to have impact on both what we build, and how we build it. Mobile engineers at Monzo work on everything from the personal banking product to customer support tools. We also have a small mobile platform squad dedicated to enabling other engineers to move faster.
Every week we meet as an iOS discipline to discuss tools, techniques, problems we're encountering across the company and work together to improve our codebase and processes.
You'll report to an engineering manager who will meet with you every 1-2 weeks 1:1. They’re dedicated to helping you grow and develop as an engineer.
Our app is 100% Swift and our latest features are built in SwiftUI and using elements of The Composable Architecture. Historically we built using a Model, View, View-Model architecture (MVVM). We use Coordinators to ensure we can re-use flows wherever possible, and avoid tightly coupling one screen to another. We make heavy use of protocols and extensions throughout our app.
Our networking stack is built upon Alamofire, using a generic interface to easily de-serialise objects of a certain type, and we mirror our backend micro-service architecture by building individual services to house our API logic. We log liberally to get alerted when they’re triggered in Sentry which we also use to monitor crashes.
Our testing stack comprises of unit tests for business logic, stubbed API tests for pseudo-integration tests, snapshot tests for UI, and XCUITest for testing user input and sequencing.
We've published some talks and blog posts about how we work:
Our interview process involves three main stages:
Our average process takes around 2-3 weeks but we will always work around your availability.
You will have the chance to speak to our recruitment team at various points during your process but if you do have any specific questions or want to talk through reasonable adjustments ahead of or during application please us at any point on tech-hiring@monzo.com
Please also use that email to let us know if there's anything we can do to make your application process easier for you, because of disability, neurodiversity or any other personal reason.
There’s a detailed blog on the interview process, for extra details, hints and tips.
How we work 💻:
Locations & Flexible Working :
Our main tech hub is in London, but our engineers live everywhere in the UK— from Brighton to the Western Isles.
We value meeting in person but there’s no pressure to come into the office, even if you're nearby. We believe you'll do your best work if you are where you want to be. If you live outside of London and we ask you to come into the office, Monzo will support you with the costs. ✨
Our offices are naturally social, especially Tuesdays, Wednesdays and Thursdays, which happen to line up with our twice-weekly Monzo lunches & treat Thursdays 🍽️. Teams also schedule time together often for work and play – in or around the office, or online.
Set up a work schedule that delivers impact and fits your life.
At Monzo, we value connections, flexibility, and wellbeing. We keep our meetings during core hours to stay connected and believe in maintaining work/life balance.
You’ll be empowered to manage your work in a way that suits you and your team, giving you the freedom for children drop-offs and pick-ups, walking your dog or adventurous cat, avoiding peak commuting times or gym slots, appointments, or supporting your family in an emergency. 🕒✨
Work the way that works for you with Monzo! 💼
💰 £78,000 - £110,000 base salary per year ➕ plus stock options + Benefits, we also provide all of our engineers with the latest MacBook Pro.
✈️ We can help you relocate to the UK
✅ We can sponsor visas but please note we aren't able to support remote working outside of the UK at the moment
📍 This role can be based in our London office, but we're open to distributed working within the UK (with ad hoc meetings in London)
⏰ We offer flexible working hours and trust you to work enough hours to do your job well, at times that suit you and your team
📚 Learning budget of £1,000 a year for books, training courses and conferences
➕ And much more, see our full list of benefits here
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