Senior iOS Engineer - Global Bank

About the Team

At SumUp, we’re on a mission to empower small businesses around the world by giving them the tools they need to thrive. Over 4 million merchants in 36 countries trust us as their financial partner, and we’re proud to help them manage payments, finances, and customer relationships with ease.

Our Global Bank Tribe is at the heart of this mission, building a cutting-edge digital banking experience tailored to the unique needs of small businesses. Whether simplifying mobile banking or enabling seamless financial transactions, our SuperApp is transforming how merchants manage their finances – quickly, intuitively, and effectively.

About the Role

As a Senior iOS Engineer in the Global Bank tribe, you’ll play a key role in shaping the future of mobile banking for millions of merchants worldwide. You’ll tackle complex technical challenges, refine our modular architecture, and build elegant, server-driven UI solutions for diverse markets.

This isn’t just about writing code – it’s about crafting a product with purpose. You’ll have the chance to see your impact at scale, collaborate globally, and deepen your skills in a supportive and innovative environment. Together, let’s redefine what banking can do for small businesses.

What You’ll Do

• Design, build, and maintain the mobile banking features to empower our global merchant userbase with smooth and engaging banking operations.
• Write high-quality, clean, and scalable code that meets the highest standards of performance and reliability.
• Contribute to architectural discussions, propose innovative solutions, and help shape the technical roadmap of our iOS applications.
• Work closely with product and design teams to deliver features that are maintainable, user-friendly, and visually beautiful.
• Mentor junior engineers and share knowledge across the Mobile Chapter and the broader organization.
• Debug and test code rigorously to ensure reliability and quality for a global user base.
• Develop a wealth of knowledge about our complex problem domain as well as its implications in the interface and the backend – and how to manage it in a clean way.

You’ll Be Great for This Role If

• You have experience building and shipping scalable complex iOS applications.
• Are skilled in Swift, Combine, and SwiftUI, with a passion for clean, maintainable code.
• You have a solid understanding of software design patterns (e.g., MVVM, MVP) and expertise in building modular, scalable app architectures.
• You strive for clean code and know how to write flexible tests that won't break.
• You have expertise with testing frameworks and know how to implement robust test strategies (unit, snapshot, XCUITest, etc.).
• Care deeply about usability, quality, and building seamless user experiences.
• You have a product-focused mindset, enjoy collaborating with cross-functional teams, and take ownership of your work.

Why you’ll enjoy working at SumUp:

• Be part of a company that values diversity and celebrates unique perspectives.
• Work with a global team of skilled professionals in an environment that fosters collaboration, learning, and growth.
• Be part of a global tribe building a banking solution from the ground up and delivering impactful solutions to the real-life problems of millions of SumUp merchants all over the world
• Career growth and learning opportunities: We invest in your development through regular training, mentorship programs, SumUp University leadership cohort and a yearly learning budget (2,000 GBP)
• Sabbatical program for tenured SumUppers
• Join a global team where you belong: Check out our D&I Initiatives and Employee Resource Groups such as Pride Club, SumAfro, Neurodiversity, Grupos Mais, Women in Tech, and more
• Health & wellness benefits: Stay fit and active with a 50% discount on gym memberships through Vitality Gym Partners and receive up to £40 per month in reimbursement for memberships or fitness centre. 
• Enrollment onto our virtual stock ownership program - you will own a stake in SumUp’s future success.
• Competitive Insurance Cover with Vitality (including optical, dental)
• Life Assurance cover with MetLife for 2x your salary 
• A Corporate pension scheme (qualifying earnings)

 

About SumUp

We believe in the everyday hero. Small business owners are at the heart of all we do, so we're creating tools that help them run their businesses. With a founder’s mentality and a 'team-first' attitude, our diverse teams across Europe, South America, and the United States work together to ensure that the small business owners we partner with can be successful doing what they love.

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, color, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate.

 

Job Application Tip

We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.