Software Engineer, Android - KMP

Software Engineer, Android - KMP

Join to apply for the Software Engineer, Android - KMP role at SumUp.

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 POS solution integrates seamlessly into the SumUp SuperApp, which supports both our proprietary register hardware and mobile devices like tablets and phones.

About The Role

We’re evolving toward a Kotlin Multiplatform (KMP) strategy, enabling shared development across Android and iOS. In this role you’ll learn, refine, and help implement this technology, shaping the future of our mobile apps. You’ll collaborate with a dynamic, cross‑functional team of Product Managers, Product Designers, Engineering Managers, and fellow engineers. This role is on‑site in Berlin, where face‑to‑face interactions spark innovation and teamwork.

What You’ll Do

• Build new features for the item catalog within the SumUp SuperApp
• Help improve the architecture of the application and contribute to our Kotlin Multiplatform strategy
• Enhance and maintain our unified Android app, distributed across 60+ countries, ensuring high‑quality, scalable solutions
• Shape the product’s evolution by identifying opportunities for improvement and contributing to daily decision‑making
• Write thorough documentation and implement robust testing for features before shipping
• Collaborate closely with Designer, Product Manager and Android engineers to deliver a unified UX experience across platforms
• Coach and mentor other engineers

Required Qualifications

• 3+ years experience in mobile engineering with Android and Kotlin
• 2+ years experience working with Jetpack Compose
• Solid understanding of software design patterns (e.g., MVVM, MVI) and expertise in building modular, scalable app architectures
• Good knowledge of reactive programming (Flow, Coroutines and concurrency)
• Strong grasp of testing best practices: knowing what to test, why, and how to write resilient tests
• Track record of writing clean code, balancing pragmatism and perfection
• Interest in multi-platform development using Kotlin Multiplatform

Why you should join SumUp

• Be part of a company that values diversity and celebrates unique perspectives
• Work with a global team of skilled professionals in an environment that fosters collaboration, learning and growth
• Be part of a global tribe building a banking solution from the ground up and delivering impactful solutions to millions of merchants worldwide
• Career growth and learning opportunities: regular training, mentorship programs, SumUp University, leadership cohort and a yearly learning budget (2,000 EUR)
• 28 days paid leave + 1 for birthday
• Sabbatical program for tenured SumUppers
• Access to D&I initiatives and Employee Resource Groups (Pride Club, SumAfro, Neurodiversity, Grupos Mais, Women in Tech, etc.)
• Health & wellness benefits: in‑house fitness classes, gym in the office, subsidised Urban Sports Club, psychotherapy sessions
• Other benefits: subsidised public transport card, Kita placement assistance, pension scheme, language learning platform/courses, etc.
• Enrollment into virtual stock ownership program – stake in SumUp’s future success

Job Application Tip

We recognise that candidates feel they need to meet 100 % of the job criteria to apply. If you don’t tick every box, it’s OK – this indicates you have room to learn and grow at SumUp.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Analyst, Information Technology, and Engineering

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