Android Engineer - KMP
sumup
📍 Warsaw, Poland, US0🕐 6/1/2026
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Role overview
sumup is hiring for the Android Engineer - KMP role in Warsaw, Poland, US. It is a position, Mid-level level, in the Tech sector. It was posted 6/1/2026.
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- Role
- Android Engineer - KMP
- Company
- sumup
- Location
- Warsaw, Poland, US
- Work mode
- On-site
- Seniority
- Mid-level
- Sector
- Tech
- Posted
- 6/1/2026
Description
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn"><strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">About the team</strong></p>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">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.</p>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">Our POS solution integrates seamlessly into the SumUp SuperApp, which supports both our proprietary register hardware and mobile devices like tablets and phones.</p>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">As an<strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2"> Android Developer</strong>, you’ll collaborate with a dynamic, cross-functional team of Product Managers, Product Designers, Engineering Managers, and fellow engineers.</p>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn"><strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">About the role</strong></p>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">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.</p>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">You’re a developer who values user-centric design, precision, and seamless collaboration. You bring structure to communication and thrive in a cross-functional environment. </p>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn"><strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">What you’ll do</strong></p>
<ul class="cui-list-9zvq cui-list-m-xr1c css-15v5cj3 evwnbdz4">
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">Build new features for the item catalog within the SumUp SuperApp</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">Help improve the architecture of the application and contribute to our Kotlin Multiplatform strategy</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">Enhance and maintain our unified android app, distributed across 60+ countries, ensuring high-quality, scalable solutions</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">Shape the product’s evolution by identifying opportunities for improvement and contributing to daily decision-making</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">Write thorough documentation and implement robust testing for features before shipping</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">Collaborate closely with Designer, Product Manager and Android engineers to deliver a unified UX experience across platforms</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">Coach and mentor other engineers</p>
</li>
</ul>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn"><strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">You’ll thrive in this role if:</strong></p>
<ul class="cui-list-9zvq cui-list-m-xr1c css-15v5cj3 evwnbdz4">
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">You have <strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">3</strong><strong>+ years of experience</strong> <strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">in mobile engineering with </strong>Android and Kotlin.</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">You have <strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">2+ years of experience</strong> working with <strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">Jetpack Compose.</strong></p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">You have a <strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">solid understanding of software design patterns</strong> (e.g., MVVM, MVI) and expertise in building modular, scalable app architectures.</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">You have<strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2"> good knowledge of reactive programming </strong>(Flow, Coroutines and Concurrency).</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">You have a <strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">strong grasp of testing </strong>best practices: knowing what to test, why, and how to write resilient tests.</p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o cui-body-normal-pvqj css-k4eprn">You <strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">strive for clean code,</strong> and you are flexible to <strong class="cui-body-o5xe cui-body-m-mwmz cui-body-semibold-pt76 cui-body-normal-pvqj cui-body-highlight-kmah css-10dm8y evwnbdz2">balance pragmatism and perfection.</strong></p>
</li>
<li>
<p class="cui-body-o5xe cui-body-m-mwmz cui-body-regular-hd7o
The market for this role in Warsaw
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