Senior Mobile Engineer (KMP)

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ Location: You can choose to work at Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, Portugal, or Spain.   Mission   Join us as an iOS Engineer and help us build the most intuitive mobile banking experience for European businesses. You'll be crafting features that directly impact the daily financial operations of over 600,000 SMEs across Europe, making their business finance simpler and more efficient.   As an iOS Engineer at Qonto, you will:   • Craft cutting-edge financial features: Work on critical architectural and UI features that will directly impact our end users. • Foster meaningful collaboration: Work closely with back-end teams, designers, and product managers to create a unified vision. • Solve real-time challenges: Tackle real-time synchronization issues and spearhead new initiatives. • Champion quality: Maintain an exceptional level of quality by implementing continuous refactoring and unit testing to consistently enhance the codebase.   What you can expect   • You'll be building for Europe's fastest-growing business banking market, with 600K+ clients across multiple countries and ambitious expansion plans • Work in an environment that prioritizes quality, comprehensive code reviews, component approach and continuous refactoring as standard practice • Contribute to a fully Swift-based app using MVP and Coordinators architecture, with modern CI/CD through GitHub, Firebase, and Bitrise • Access to expert mentorship, Tech Weeklies & Monthlies, and conference opportunities to stay at the forefront of iOS development   Our methodology, the Qonto Way We value upfront technical design, team reviews, and smart slicing, quality drives the velocity our customers need; Our org assigns one team lead per project across stacks, giving your team a clear mission and full autonomy on how it operates; Our lean toolbox, Kaizen, PDCA, lets you monitor and drive continuous improvement collaboratively with your peers and manager; Each engineer gets access to Cursor or Copilot, and we want people who use AI to raise the bar, not just to go faster.   Your future team As an IOS Engineer, you will join one of Qonto's squad teams, each organised around a clear project mission, with one team lead and full ownership of a product scope. You'll be part of a 140 mobile engineering community within a 500 Product Engineering department, working in focused teams of 5 to 10 people alongside Product, Design, and peers from Frontend and Backend.   Our stack & practices Our app is 100% Swift, built on MVP & Clean Architecture with 35+ independent modules. We use the Coordinator pattern for scalability, and all new screens are built in SwiftUI (MVVM) with async/await — 80+ screens already migrated. Project generation and build optimization run on Tuist. CI/CD covers GitHub Actions, Bitrise, Firebase Test Lab, Sonar, and Fastlane. We take technical excellence seriously: 30,000+ unit tests, 450+ snapshot tests, SwiftyMocky for mock generation, and LLMs integrated into our dev workflow. Our modular architecture (32 reusable modules + centralized design system) ensures fast builds, clear ownership, and safe iterations. Want to know more about our mobile performance indicators? Read this. About You   • iOS Expertise: Proven experience as a Mobile engineer with strong Swift skills and deep understanding of the iOS ecosystem, SDK, and development lifecycle • Quality-driven development: Strong commitment to best practices, including unit testing (XCTests, FBSnapshots), Clean code / SOLID principles, and organized workflows • Problem-solving approach: Pragmatic and solution-oriented approach to engineering challenges, with ability to deliver tangible value in a fast-paced environment • Collaborative spirit: Excellent communication skills, fluent english and experience working effectively in cross-functional teams with both technical and non-technical colleagues • Growth mindset: Curious and proactive developer who thrives on learning new technologies and contributing to a product serving hundreds of thousands of users

About the role As a Senior Embedded QA Engineer in SumUp's Hardware Tribe, you will be part of one of our small and highly skilled cross-functional teams and work together with Product Managers, Embedded Engineers, Mobile Engineers, and more. You will build sustainable solutions for testing and be accountable for the mobile testing tools that the QA team are building. Lastly, you will also be a critical decision maker in the design of hardware test infrastructures to run HIL tests and provide crucial support to software releases. You should be an engineer with a product mindset who can fully own the features you are working on and remain flexible with changing priorities. The role is based on-site in our office in Berlin. We believe in the power of face-to-face conversations that happen organically when working next to one another. About the team You have probably used our card readers to buy a cappuccino or pay your hairdresser already. 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. We believe in open communication and constant learning over strict rules. If you're looking for the chance to innovate and help millions of small independent merchants succeed - join us! What you’ll do * Ensure that all new code of developers has the right quality and is compliant with selected best practices (in collaboration with the CL) * Build and maintain test infrastructure for HIL tests, with a strong emphasis on Embedded QA. * Ensure that multiple types of tests cover the main features (especially UI, Mobile Application, and end to end tests)  * Ensure that new releases are delivered timely with the right quality  * Evangelize a strong quality mindset within the Hardware tribe You'll be great for this position if: * Expertise in Embedded QA in Linux environment * Experience with Object Oriented Programming (Python being a must) * Knowledge with REST APIs * Experience building test libraries * Expertise in testing and continuous integration strategies * Experience of manual testing, writing test cases and campaign management Why you should join SumUp * The opportunity to work on large scale fintech products used by millions of small businesses around the world * A dedicated annual Learning & Development budget for attending conferences and/or advancing your career through further education * Enrollment onto our virtual stock ownership program - you will own a stake in SumUp’s future success * A corporate pension scheme  * 28 days paid leave + 1 for birthday  * You’ll attend global offsites and/or hackathons. * You'd enjoy other great benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidized office lunches and other location-tailored benefits, Babbel language platform subscription and more! 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.