Senior Software Engineer, Android - KMP

About the role

We're seeking a Senior Android Developer to join our Point-of-Sale solution team, building features for the SumUp SuperApp that serves businesses across 60+ countries. You'll work on evolving toward a Kotlin Multiplatform strategy while developing user-centric mobile solutions in a collaborative, cross-functional environment.

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

What you'll need

• 8+ years experience in mobile engineering with Android and Kotlin
• 2+ years of 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
• Strive for clean code and ability to balance pragmatism and perfection

Nice to have

• Keen interest in multi-platform development using Kotlin Multiplatform

What they offer

• 28 days paid leave + 1 for birthday
• 2,000 EUR yearly learning budget and mentorship programs
• Health & wellness benefits including in-house fitness classes and gym access
• Subsidized public transport card and pension scheme
• Virtual stock ownership program
• Sabbatical program for tenured employees