Senior iOS Engineer

Responsibilities

• Design, build, and ship iOS features across SumUp Pay - including KYC and card activation flows, savings, open banking consent, and payment experiences
• Take ownership of performance monitoring, crash reporting, and app stability, proactively resolving issues before they reach customers
• Contribute to the evolution of our iOS architecture - including modularisation, dependency management, and scalability as the product grows
• Partner with the CRM Manager to implement in-app messaging (modals and banners) via Iterable, ensuring correct event instrumentation and display logic on iOS
• Write clean, testable Swift code and contribute actively to code reviews, CI/CD pipeline health, and a culture of quality across the team
• You'll be great for this role if...
• Strong proficiency in Swift and the iOS framework, with a track record of shipping consumer-facing features in a product environment.
• Experience integrating RESTful APIs and collaborating closely with backend engineers on API design and contracts.
• Solid understanding of iOS architecture patterns, modularisation, and writing maintainable, well-tested code.
• Comfort working in a regulated or fintech environment, with an appreciation for the security, compliance, and data privacy considerations that come with it.
• A product-oriented mindset - someone who thinks about the user journey, not just the implementation, and brings both craft and pragmatism to technical decisions.
• Why you should join SumUp
• 🌎 Opportunity to work with a truly global, multicultural team from our central Covent Garden location, wrapped in historic charm and modern flair. 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
• 🏖 Generous time off: enjoy 28 days of paid leave, plus bank holidays and special leaves 📚 A dedicated annual L&D budget for attending conferences and/or advancing your career through further education
• 🏥 Health matters: private health insurance, including optical and dental 🚗 Life made easier: salary-sacrifice commuter benefits via Gogeta
• 💼 Financial security: retirement scheme (SumUp matches 7% when you contribute 5%) 🛡 Peace of mind: life insurance from MetLife for 2× your salary
• 🌴 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
• Be empowered to do more that matters.
• At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships.

Benefits

Additional Information

Senior iOS Engineer (Swift) - SumUp Pay Location: London, United Kingdom Team: Consumer Team description The Consumer team builds and maintains SumUp Pay - a regulated consumer banking app spanning payments, card management, savings, and open banking, used by hundreds of thousands of customers every day. We're a cross-functional squad of engineers, product managers, and designers working at pace on a product that genuinely matters to the people who rely on it. Right now, we're growing our iOS function to match the ambition of our product roadmap - and this role sits at the heart of that. As an iOS Engineer, you'll own meaningful parts of the SumUp Pay experience end-to-end, from onboarding and KYC flows through to savings features and in-app messaging. With a lean iOS team and a growing product surface, there's real scope to shape how we build - not just what we build.

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