About the team:
As an iOS Engineer on the Design System team, you'll translate SumUp's design language into a reusable, easy-to-use library of UI components and experience patterns, empowering product teams to build cohesive, accessible user experiences at scale.
The Design System team works hand-in-hand with the Mobile Platform team to set standards and provide guidance across all product teams at SumUp. As we expand our ecosystem of merchant and consumer-facing products, this role offers a rare opportunity to shape the foundation that helps developers build faster and ship higher-quality experiences to millions of users worldwide.
What you’ll do:
- Shape the core experience for both users and developers interacting with SumUp's iOS ecosystem
- Collaborate closely with product and design teams to build components that are maintainable, consistent, and beautiful
- Embed accessibility best practices into every component — from content descriptions and touch target sizing to color contrast and dynamic type
- Provide hands-on technical guidance to product teams to deliver on company priorities, including the upcoming support for landscape orientation
- Review code contributions, enforce design system conventions, and mentor engineers on best practices for reusable UI development
- Lead the migration of legacy UIKit-based components to SwiftUI while maintaining system stability
- Proactively identify and address technical debt to uphold a high bar for engineering excellence and codebase health
You’ll be a great fit for this role if you:
- Bring 3+ years of professional iOS development experience, ideally on large-scale or consumer-facing applications
- Are fluent in Swift, with deep hands-on knowledge of both SwiftUI and UIKit — and a clear view on when and how to use each
- Bring experience building or contributing to a design system, component library, or shared UI framework, and understand what it takes to make components truly reusable and scalable
- Take pride in crafting accessible user experiences — you know your way around VoiceOver, dynamic type, color contrast, and touch target standards, and treat accessibility as a first-class concern, not an afterthought
- Bring a strong grasp of testing best practices for UI components, including unit tests, snapshot tests, and UI automation
- Are comfortable reviewing code and mentoring peers — you enjoy sharing knowledge, giving constructive feedback, and raising the bar for the whole team
- Are self-motivated and structured in your working style — you manage your own priorities, communicate clearly in English, and thrive in a cross-functional, collaborative environment
- Stay genuinely curious about the iOS ecosystem — you follow Apple's releases closely, experiment with new APIs, and are excited to bring fresh ideas back to the team
Why you should join SumUp:
🌎 Opportunity to work with a truly global, multicultural team from our Paris location. This involves an office-first setup
🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced
🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success
📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education
💼 Financial security: corporate pension contributions that support your long-term future
🏥 Healthcare support: we cover 50% of the monthly cost of your health insurance for your Mutuelle and Prévoyance
🚌 Extra allowances: we offer restaurant tickets (Swile) and cover transportation costs
🌴 Break4me: 1-month sabbatical after 3 years of service
🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team
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, colour, 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.
Skills Required
- 3+ years of professional iOS development experience
- Fluency in Swift
- Deep hands-on knowledge of SwiftUI and UIKit
- Experience building or contributing to a design system, component library, or shared UI framework
- Knowledge of accessibility practices including VoiceOver, Dynamic Type, color contrast, and touch target standards
- Experience with unit tests, snapshot tests, and UI automation for UI components
- Experience reviewing code and mentoring peers
- Clear communication in English
- Experience with large-scale or consumer-facing applications
SumUp Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about SumUp and has not been reviewed or approved by SumUp.
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Leave & Time Off Breadth — Paid time off is positioned as a standout, including 22 vacation days that increase with tenure, public holidays, a quarterly Wellness Day, special leave, and a fully paid one‑month sabbatical after three years. This combination makes time-off benefits feel notably robust in the overall rewards package.
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Healthcare Strength — Health coverage is described as comprehensive, with medical plan options (including carriers such as Cigna and Kaiser) plus dental and vision. Company-paid life insurance and disability coverage are also part of the protection package in the U.S. materials.
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Retirement Support — Retirement benefits include a published 401(k) match formula that provides an employer match up to a stated cap. The clarity of the match structure supports straightforward evaluation during offer comparisons.
SumUp Insights
What We Do
SumUp believes that every business should have access to affordable, easy-to-use financial solutions, no matter their size. That’s why more than 3 million businesses worldwide rely on SumUp to run their business. What started out as one card reader has now turned into a range of payment hardware, banking solutions, marketing, and loyalty tools, invoicing, and so much more. From sales and marketing to product and engineering, our cross-functional US team works together to ensure that small business owners can be successful doing what they love.
Why Work With Us
SumUp USA is part of the global SumUp organization that stretches across multiple continents from Berlin to Sao Paulo. Our teams are multicultural, have a collaborative mindset and bold goals. Join our mission if you want to become part of the success story and help empower over 3 million merchants using SumUp already!
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