Senior Front End Software Engineer

We’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.

Global payments are complex and ever-evolving. At Checkout our software engineers develop the next-generation payments technologies that enable our Merchants to boost their acceptance rates, cut processing costs, fight fraud, and create cutting edge technology that enables extraordinary customer experiences. We are looking for engineers who bring fresh ideas, have a curious nature and are passionate about working in an Engineering environment which focuses on building products to achieve the company's strategic goals. You’ll get to work with teams from across Checkout.com’s portfolio of products and services who all have a real customer first philosophy. As a Senior Software Engineer embedded within a multifunctional team, you will collaborate with Product and Design counterparts to lead the UI implementation of Checkout.com products and services, ensuring our merchants enjoy an optimal experience across all frontend touchpoints. We seek engineers who are versatile, demonstrate exceptional leadership qualities, and are enthusiastic about tackling new challenges across the full stack as we push technology forward. With your technical expertise, you will lead project priorities, manage deadlines, and ensure high-quality deliverables. You will be responsible for designing, developing, testing, deploying, maintaining, and enhancing software solutions.

Responsibilities

• Lead UI implementation for Checkout.com products and services within a multifunctional team.
• Collaborate with Product and Design to deliver a high-quality user experience across frontend touchpoints.
• Define project priorities, manage deadlines, and ensure timely, high-quality deliverables.
• Design, develop, test, deploy, maintain, and enhance software solutions.

Qualifications

• Comprehensive skills in React and TypeScript: capable of architecting complex applications, driving best practices, and mentoring others.
• Extensive experience in software development, design, and architecture, with a strong focus on security.
• Experience collaborating on software projects with both design and backend teams.
• Experience with Continuous Integration and Deployment workflows.
• Cloud-based application development experience.
• Strong customer focus; building accessible applications with a great UX.
• Experience leading tech initiatives, guiding your team and delivering.
• Experience building reliable, accessible and well-tested systems.
• Great communication skills and ability to interact effectively with multidisciplinary teams.

Desirable

• Some experience with C# is nice to have.
• Understanding of common security vulnerabilities and performance issues in web applications and knowing how to debug them.
• Experience with asynchronous, event-driven architecture.
• Database experience with NoSQL, ElasticSearch or similar tool.

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.

We 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.