Senior Android Engineer London

Checkout Ltd; London; On-site; GBP 50,000 - 90,000; Full time

Job summary

Join a forward-thinking fintech company as a Senior Android Engineer, where you will design and build innovative Android features that enhance customer experiences. Collaborate with cross-functional teams to deliver high-impact solutions, while advocating for best practices in SDK development. This role offers the chance to take ownership of projects and mentor junior engineers, all within a dynamic and inclusive work environment that values innovation and collaboration. If you're passionate about technology and eager to make a difference, this opportunity is perfect for you.

Qualifications

• Proficiency in Kotlin and Android SDK with strong system fundamentals.
• Experience in designing Android architecture and integrating with APIs.

Responsibilities

• Lead feature development and optimize Android features for the platform.
• Take ownership of projects from design to deployment and support.

Skills

Kotlin

Android SDK

Jetpack Compose

Coroutines

API Integration

MVVM Pattern

Agile Methodologies

Tools

Jira

AWS

CI/CD

Job description

Checkout.com is one of the most exciting fintechs in the world. Our mission is to enable businesses and their communities to thrive in the digital economy. We’re the strategic payments partner for some of the best known fast-moving brands globally such as Wise, The Hut Group, Sony Electronics, Sainsbury’s, Deliveroo, Adidas, Klarna and many others. Purpose-built with performance and scalability in mind, our flexible cloud-based payments platform helps global enterprises launch new products and create experiences customers love. And it's not just what we build that makes us different. It's how.

We empower passionate problem-solvers to collaborate, innovate and do their best work. That’s why we’re on the Forbes Cloud 100 list and a Great Place to Work accredited company. And we’re just getting started. We’re building diverse and inclusive teams around the world — because that’s how we create even better experiences for our merchants and our partners. And we need your help. Join us to build the digital economy of tomorrow.

Job Description

We'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 Impact

• Lead 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

Qualifications

• Proficiency 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 have:

• Experience 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.

Additional Information

Apply without meeting all requirements statement

If you don't meet all the requirements but think you might still be right for the role, please apply anyway. We're always keen to speak to people who connect with our mission and values.

We believe in equal opportunities

We work as one team. Wherever you come from. However you identify. And whichever payment method you use.

Our clients come from all over the world — and so do we. Hiring hard-working people and giving them a community to thrive in is critical to our success.

When you join our team, we’ll empower you to unlock your potential so you can do your best work. We’d love to hear how you think you could make a difference here with us.

We want to 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. We’ll be happy to support you.

Take a peek inside life at Checkout.com via

Apply without meeting all requirements statement

If you don't meet all the requirements but think you might still be right for the role, please apply anyway. We're always keen to speak to people who connect with our mission and values.

We believe in equal opportunities

We work as one team. Wherever you come from. However you identify. And whichever payment method you use.

Our clients come from all over the world — and so do we. Hiring hard-working people and giving them a community to thrive in is critical to our success.

When you join our team, we’ll empower you to unlock your potential so you can do your best work. We’d love to hear how you think you could make a difference here with us.

We want to 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. We’ll be happy to support you.

Take a peek inside life at Checkout.com via