Senior Android Engineer

Company DescriptionWe’re Checkout.com – you might not know our name, but companies like eBay, ASOS, Klarna, Uber Eats, and Sony do. That moment when you check out online? We make it happen.Checkout.com is where the world checks out. Our global network powers billions of transactions every year, making money move without making a fuss. We spent years perfecting a service most people will never notice. Because when digital payments just work, businesses grow, customers stay, and no one stops to think about why.With 19 offices spanning six continents, we feel at home everywhere – but London is our HQ. Wherever our people work their magic, they’re fast-moving, performance-obsessed, and driven by being better every day. Ideal. Because a role here isn’t just another job; it’s a career-defining opportunity to build the future of fintech.Job DescriptionWe're looking for a seasoned Senior Android Engineer to join our Mobile Team. In this role, you’ll work closely with our product and engineering teams to design, build, and refine Android features that power exceptional customer experiences across our applications.You’ll take ownership of delivering high-impact solutions from concept through deployment, with a strong focus on scalability, performance, and security. As a key contributor, you’ll help define the architecture of our Android SDKs - critical tools for partners integrating our payment solutions - and lead by example in code quality, team collaboration, and platform advocacy.How You’ll Make An ImpactLead Feature Development: Collaborate across disciplines to define, build, and optimize Android features that integrate seamlessly within our microservices-based platform.Code Craftsmanship: Write clean, maintainable, and well-tested Kotlin code, helping drive engineering excellence across the Android codebase.System Ownership: Take full ownership of your projects, from technical design through to implementation, deployment, and ongoing support.Mentorship & Leadership: Share knowledge, provide thoughtful PR reviews, and guide junior engineers to elevate the team’s capabilities.SDK Best Practices: Champion SDK development standards, including CI/CD integration, modular design, and performance tuning.Seamless Android-Backend Integration: Design Android features and collaborate closely with backend engineers to build scalable, resilient integrations.Continuous Improvement: Stay on top of Android trends, explore new technologies, and contribute ideas that improve engineering workflows and developer experience.What We’re Looking ForProficiency in Kotlin, Android SDK, and Jetpack Compose libraries.Strong understanding of Android system fundamentals: Activity/Fragment lifecycle, background execution, Coroutines, memory management, dependency injection (e.g., Hilt/Dagger).Experience designing Android architecture with patterns like MVVM or MVI.Demonstrated experience integrating with APIs.Track record of delivering SDKs or complex Android libraries, including backward compatibility and multi-module design.Solid grasp of testing strategies using JUnit, Espresso, and mocking frameworks like MockK.Proven ability to collaborate across functions and communicate technical concepts clearly.Experience working in agile teams, and shipping features with measurable impact.Comfortable navigating ambiguity and owning outcomes end-to-end.Nice To HaveExperience with Kotlin Multiplatform (KMP) - we are still early on our journey with this cross-platform development solution, so your experience will help us shape what this looks likeExperience with building and maintaining Android SDKs adopted by external teams.Experience working with CI/CD using tools like Github Actions. Hands-on experience with AWS services (e.g., S3, API Gateway, Lambda).Familiarity with payments or financial systems is a plus.Experience with Jira for project management.Experience in iOS development, in order to be able to support the iOS engineers via code reviewsBring all of you to work We create the conditions for high performers to thrive – through real ownership, fewer blockers, and work that makes a difference from day one.Here, you’ll move fast, take on meaningful challenges, and be recognized for the impact you deliver. It’s a place where ambition gets met with opportunity – and where your growth is in your hands.We work as one team, and we back each other to succeed. So whatever your background or identity, if you’re ready to grow and make a difference, you’ll be right at home here.It’s important we set you up for success and make our process as accessible as possible. So let us know in your application, or tell your recruiter directly, if you need anything to make your experience or working environment more comfortable.Life at Checkout.comWe understand that work is just one part of your life. Our hybrid working model offers flexibility, with three days per week in the office to support collaboration and connection.Curious about what it’s like to be part of our team? Visit our Careers Page to learn more about our culture, open roles, and what drives us.For a closer look at daily life at Checkout.com, follow us on LinkedIn and Instagram