iOS Engineer, Hardware

You have probably used our card readers to buy a cappuccino or pay your hairdresser already, but did you know these devices make up more than 95% of SumUp’s business?

In Hardware, we are passionate about creating these beautifully designed card payment devices and accessories that enable our merchants to start, run, and grow their own businesses. In doing so, we deal with a diverse range of engineering topics - industrial and electronic design, embedded systems, all the way to mobile apps and backend services.

As a Senior iOS Engineer, your role will involve developing our mobile apps and integrating our hardware products and connected services. You’ll drive the implementation of features alongside a small, highly skilled team of cross-functional engineers.

What you’ll do

  • Build the future of integration with SumUp card readers and optimise their interactions with the iOS mobile app and SDK
  • Work at scale – our card readers are used by millions of merchants across the world processing 200,000 transactions per day
  • Work closely with product and design peers to build features that are maintainable, usable, and beautiful
  • Solve challenging engineering problems in Core Bluetooth, security and binary protocols
  • Modernise and modularise our iOS app
  • Represent the Hardware Tribe in the company-wide mobile chapter to collaborate on architectural decisions, release processes, etc.
  • Take an active role in mentoring your peers on engineering principles, design and implementation


You'll be great for this position if

  • You have extensive programming experience in Objective-C and Swift.
  • You care about user interaction, usability and of course, making the interface beautiful.
  • You know what to test, why to test it, and how to write flexible tests that won't break.
  • You enjoy working with multinational cross-functional teams.
  • You are proactive and able to thrive in a fast-paced dynamic environment.


Why you should join SumUp 

  • We’re one of the most innovative fintech players in Europe as well as North and South America.
  • You will be working directly with our payment terminals we build in-house from scratch.
  • We’re a truly global team of 3000+ people from 60+ countries, spread across 3 continents. We have a close, welcoming and international community. We get together regularly for brunches, cocktail nights, football, office parties and cooking dinners ;)
  • 28 days’ paid leave
  • SumUp Corporate Pension Plan
  • Yoga classes, running & football teams, subsidised Urban Sports Club membership
  • Learning & development budget for attending conferences and external training
  • A lot of other cool benefits such as Subsidized Public Transport Card, Language Learning platform (Babbel Premium), Kita placement assistance, relocation assistance, 2x per week subsidized office lunches, and a brand new beautiful place to work in the heart of Berlin!


Apply now!

We're looking forward to meeting our next teammate! You can also choose whether to include a CV, your LinkedIn profile, a link to your github, tech blog, or portfolio – whatever you think will give us the complete picture.

About SumUp

We believe in the everyday hero. Those who have the courage to follow their passion and who have the strength and determination to realise their dreams. Small business owners are at the heart of all we do, so we're creating powerful, easy-to-use financial solutions to help them run their business. 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 small business owners 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.