Senior Android Engineer - Design System

As a Senior Android Engineer in the Design System team, you will translate our design language into an easy-to-use, reusable library of user interface components and experience patterns, enabling SumUp’s product teams to build cohesive and accessible user experiences. The Design System team  collaborates closely with the Mobile and Web Platform teams to provide guidance and set standards for all product teams across the company. 

This is a unique opportunity to make a strategic and technical impact, and your work will directly contribute to company priorities such as the upcoming brand refresh.

What You'll Do

• Shape the core experience of merchants and developers interacting with SumUp’s Android ecosystem.
• Work closely with the product and design team to build components that are maintainable, usable, beautiful and consistent.
• Embed accessibility best practices into every component (content descriptions, touch target size, color contrast, font scaling).
• Implement dynamic theming support (light/dark mode, brand variations) that can be switched at runtime or via configuration.
• Provide hands-on technical support to product teams to deliver company priorities, including supporting teams in adopting the refreshed brand.
• Lead code reviews, enforce design‑system conventions, and mentor junior engineers on best practices for reusable UI development.
• Maintain a high bar for engineering excellence and continually raise it by introducing new technologies and best practices.

What We're Looking For

• You have 5+ years of professional Android development experience, with expertise in Kotlin and modern Android frameworks.
• You have 2+ years of experience working with Jetpack Compose.
• You strive for clean code, and are flexible to balance pragmatism and perfection.
• You have a strong grasp of testing best practices: knowing what to test, why, and how to write resilient tests.
• You have a strong eye for detail and are committed to accessibility 
• You take demonstrated pride in your engineering work, possess a strong sense of ownership, and keep up to date on advancements in the Android ecosystem.
• You have good technical communication skills, and are comfortable speaking publicly and influencing technical decisions across teams.
• You are excited about mentoring others and actively participating in the Android community.

Bonus Points (Nice to Have)

• Experience building and maintaining design systems / component libraries for Android, including theming, style guides, and reusable UI components.
• Experience navigating complex codebases and refactoring existing code
• Experience working with 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 the real-life problems of millions of SumUp merchants all over the world

• Career growth and learning opportunities: We invest in your development through 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

• Join a global team where you belong: Check out our D&I Initiatives and Employee Resource Groups such as Pride Club, SumAfro, Neurodiversity, Grupos Mais, Women in Tech, and more

• Health & wellness benefits: in-house fitness classes, gym in the office, subsidized Urban Sports Club and available psychotherapy sessions

• A lot of other benefits such as Subsidized Public Transport Card, Kita placement assistance, Pension Scheme, Language Learning platform/courses etc.

• Enrollment onto our virtual stock ownership program - you will own a stake in SumUp’s future success.

Job Application Tip

We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.