iOS Engineer - Mobile Platform

SumUp; Galloway Township (NJ); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

L&D budget of €2,000

VSOP program equity

Pension match up to 20%

30 days sabbatical

Relocation assistance

Office lunches

Urban Sports Club subsidy

Job summary

SumUp's Mobile Platform Squad in New Jersey builds and maintains the internal foundations that power SumUp's iOS features. You will work closely with mobile engineers to ship fast and reliably, and contribute to infrastructure and tooling that supports the whole platform.

The role requires 3+ years in Swift, strong iOS knowledge, and comfort with CI/CD pipelines and tooling. SumUp offers growth opportunities, global collaboration, and benefits that include pension matching, sabbatical, and

Qualifications

• 3+ years of professional iOS development experience with Swift and modern iOS frameworks.
• Experience with CI/CD pipelines and developer tooling.
• Solid understanding of testing methodologies and design principles.
• Ability to work across squads and own platform initiatives.

Responsibilities

• Develop and maintain internal tools, frameworks, and infrastructure for SumUp's iOS app.
• Contribute to CI/CD systems and developer tooling initiatives.
• Address technical debt and improve codebase health with a focus on maintainability.
• Collaborate with mobile engineers across squads as a platform expert.
• Take end-to-end ownership of platform initiatives from design to delivery.

Skills

Swift

iOS development

CI/CD

Developer tooling

Communication

Education

Bachelor's degree in CS

Tools

GitHub Actions

Fastlane

Job description

About the team:

The Mobile Platform Squad is the backbone of SumUp's iOS engineering — we build and maintain the foundation that every iOS feature team relies on to ship fast, confidently, and at scale.

We're a small, high-impact team that sits at the intersection of infrastructure, developer experience, and engineering excellence. Our work isn't visible to merchants directly, but it's felt by every iOS engineer at SumUp every single day — through faster build times, smoother CI/CD pipelines, healthier codebases, and better tooling.

With significant investment in SumUp's mobile products, we're on a mission to empower feature teams to deliver world-class experiences without being slowed down by platform friction. That means building robust internal frameworks, evolving a mature and complex codebase, and acting as a trusted partner to mobile engineers across the organization.

Our engineering culture is built on autonomy, collaboration, and craft. We move with purpose, share knowledge openly, and believe that great platform work is what makes great product work possible. If you're someone who finds deep satisfaction in enabling others to do their best work — you'll feel right at home here.

What you'll do:

• Develop and maintain internal tools, frameworks, and infrastructure that support the consistency, scalability, and long-term health of SumUp's iOS app
• Contribute to CI/CD systems and developer tooling initiatives that help feature teams ship with speed and confidence
• Tackle technical debt and codebase health improvements in a complex, mature codebase — with a focus on simplicity and maintainability
• Collaborate closely with mobile engineers across squads, acting as a go-to partner for platform questions, reviews, and best practices
• Take end-to-end ownership of well-scoped platform initiatives — from design and implementation through to delivery and documentation

You will be a great fit for this role if you:

• Bring 3+ years of professional iOS development experience, with solid hands-on knowledge of Swift and modern iOS frameworks
• Are experienced with or genuinely excited about CI/CD pipelines (e.g., GitHub Actions, Fastlane) and developer tooling — you see automation as a superpower
• Have a solid understanding of testing methodologies, architecture patterns, and design principles, and apply them with pragmatism
• Are comfortable working outside the boundaries of a typical feature team — you're adaptable, self-directed, and thrive with a mix of structured and ambiguous work
• Can navigate and improve complex, mature codebases with patience, curiosity, and a long-term mindset
• Communicate and collaborate clearly across teams — you're comfortable with frequent context switching and know how to bring clarity to technical discussions

Nice to have:

• Experience with modularized codebases, internal tooling, or Ruby scripting

Why you should join SumUp:

• 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
• We take learning and experimentation seriously with Hack Days every second Friday, and entire global Hack Weeks.
• 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
• A dedicated annual L&D budget of €2,000 for attending conferences and/or advancing your career through further education
• Enrolment onto our VSOP program: You will own a stake in SumUp’s future success
• A corporate pension scheme where we match up to 20% of your contributions
• 30 Days Sabbatical: Enjoy the unique opportunity to take a well-deserved break with our 30 days sabbatical benefit after completing 3 years of employment with SumUp
• Referral Bonus: Earn additional rewards by referring talented individuals to join the SumUp team
• Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, relocation assistance, subsidised office lunches

About us:

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 36 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships.

Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify.

SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on 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. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited.

Explore career opportunities with us and join a team driven by collaboration, innovation, and a shared vision of creating a world where everyone can build a thriving business. Discover more about our vibrant and inclusive work culture and how we work on careers website, and follow our journey on LinkedIn and Instagram.

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.