Senior iOS Engineer
Sumup
Posted: March 24, 2026
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Quick Summary
We are looking for a Senior iOS Engineer to join our team in Warsaw, Poland to work on the Point-of-Sale solution, focusing on integrating with third parties and compliance support.
Job Description
About the team
SumUp’s Point-of-Sale (POS) solution empowers cafes, shops, bars, hair salons, and other businesses to operate efficiently and grow. It offers a wide range of features, including product catalogs, inventory management, business analytics, compliance support, and loyalty tools.
Our Fiscalization team will accelerate making the following countries fiscally compliant: Italy, Sweden, Norway, Belgium, Austria, and many other European countries. They will also start building the path for integrating with third parties and fiscalizing receipts.
As a Senior iOS Engineer, you’ll collaborate with a dynamic, cross-functional team of Product Managers, Product Designers, Engineering Managers, and fellow engineers.
About the role
This position is critical for executing SumUp's Fiscalization roadmap. This engineer will be directly impacting our ability to deliver the New Market Fiscalization initiative and release core strategic staff management features.
These features are foundational to our company strategy and are essential for aligning our POS capabilities.
What you’ll do
• Execute the release of our Fiscalization roadmap features, including items such as Shift Management and Clock-In/Clock-Out.
• Implement new features and maintaining in-App implemented staff management features using KMP and iOS / Swift UI.
• Develop new screens in Swift UI and KM and work with Android Engineers to develop the same UX experience between platforms.
You’ll thrive in this role if:
• You have 5+ years experience in iOS development in Swift UI.
• You have a strong understanding of fundamental iOS architecture, design principles, data modeling, and API design.
• You have strong experience with functional reactive programming (Combine).
• You have strong interest or experience in Kotlin Multiplatform and cross-platform mobile development.
Why you should join SumUp
•
🌈 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 VSOP program: you will own a stake in SumUp’s future success
🚴 Fitness support: work out on-site at our gym or explore the city using the Multisport Card, subsidised by SumUp for access to sports facilities across Warsaw
🩺 Commitment to well-being: access health insurance coverage for you and your family, plus life insurance to further protect your peace of mind
💰 PPK (Employee Capital Plan): grow your savings with joint contributions from SumUp and the State.
🏖️ Generous time off: enjoy 26 days of paid leave plus public holidays and special leave days 🌴 Break4me: 1-month sabbatical after 3 years of service
🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team
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.