About the team: As a Senior Android Engineer in the Mobile Platform Squad, you’ll be part of the backbone of Mobile Engineering at SumUp. Y…
Senior Android Engineer
Skills & Technologies
Job Description
As a Senior Android Engineer, you will be at the forefront of shaping our specialized merchant-facing ecosystem. You’ll have the unique opportunity to build and scale high-impact solutions - including Kiosks, Kitchen Display Systems (KDS), Customer Facing Displays (CFD), and POS peripherals - that power complex retail and restaurant environments worldwide. In this role, your work will directly bridge the gap between hardware and software, creating seamless, world-class experiences for millions of merchants and their customers.
What you'll do
Drive the development and scaling of Android-based merchant solutions, focusing on self-service Kiosks and specialized point-of-sale interfaces.
Build and refine high-impact features that enhance the merchant and consumer experience across a diverse product suite.
Support our transition toward Kotlin Multiplatform (KMP) to share business logic across the wider mobile ecosystem.
Create maintainable, accessible, and performant user interfaces using Jetpack Compose.
Strengthen product reliability by implementing robust testing suites and expanding automated QA coverage across our hardware-integrated software.
Collaborate with cross-functional teams to deliver cohesive features that meet the needs of global enterprise partners.
Lead code reviews, enforce architecture standards, and mentor other engineers on best practices for reusable UI development.
You’ll thrive in this role if
5+ years of professional Android development experience with deep expertise in Kotlin.
2+ years of hands-on experience building production applications with Jetpack Compose.
Professional experience or a keen interest in Kotlin Multiplatform (KMP) development.
Solid understanding of software design patterns (e.g., MVVM, MVI) and building modular, scalable app architectures.
High proficiency in reactive programming, including Flow, Coroutines, and Concurrency.
A strong grasp of testing best practices: knowing what to test, why, and how to writ
Company & Role Analysis
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£45,000 – £60,000 (Glassdoor, Levels.fyi, 2025)
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