iOS engineer in design systems

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.

• 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

• 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

• Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. 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 you can be used to attend conferences and/or advancing your career through further education
• A corporate pension scheme where we match up to 20% of your contributions
• Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days
• Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches
• Break4me: 1-month sabbatical after 3 years of service
• Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team