Senior Android Engineer

Sumup Inc.
Charing Cross, United Kingdom
2 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Senior
Compensation
£ 67K

Job location

Charing Cross, United Kingdom

Tech stack

Android
Business Logic
Automation of Tests
Fluid
Code Review
Software Design Patterns
Model View ViewModel
Concurrency
Facebook Flow
Kotlin
Jetpack Compose
Reactive Programming
Asynchronous Programming
Code Restructuring
Multiplatform

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 youll 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.

Requirements

  • You have 5+ years of professional Android development experience with deep expertise in Kotlin.

  • You bring 2+ years of hands-on experience building production applications with Jetpack Compose.

  • You possess professional experience or a keen interest in Kotlin Multiplatform (KMP) development.

  • You have a solid understanding of software design patterns (e.g., MVVM, MVI) and building modular, scalable app architectures.

  • You demonstrate a high proficiency in reactive programming, including Flow, Coroutines, and Concurrency.

  • You maintain a strong grasp of testing best practices: knowing what to test, why, and how to write resilient tests.

  • You take a pragmatic approach to engineering, balancing high-quality code with the speed required for global product launches.

  • You offer excellent verbal and written English communication skills for effective cross-team collaboration.

  • You are already authorized to work in the UK, this position does NOT offer visa sponsorship.

Bonus points:

  • Experience with hardware-integrated Android applications or POS peripherals.

  • Experience in QA automation and improving CI/CD pipelines for mobile.

  • Experience navigating and refactoring complex, large-scale codebases.

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