Senior Software Engineer I

Company Overview

Checkout.com is behind many of the digital experiences people use every day.

When you book a holiday, order food, renew a subscription or check out online with brands like Spotify, Klarna, Uber Eats, TikTok, Sony, or eBay, there's a good chance our technology powers the payment behind the scenes.

At Checkout.com, we’re building where the world checks out – enabling over ten billion transactions every year for more than one billion shoppers globally.

Our platform helps the world’s most ambitious businesses deliver seamless digital experiences at scale. We move fast, think globally, and believe great teams are built by hiring exceptional people with conviction, curiosity, and a focus on impact.

With 20 offices across six continents and London as our HQ, we’re shaping the future of fintech and we’re just getting started.

Job Summary

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’re looking for Senior Software Engineers who bring fresh ideas, have a curious nature, and are passionate about working in an engineering environment that focuses on building products to achieve the company’s strategic goals. You will lead and drive specific projects, switch teams and projects as the business grows, and take on new problems across the full stack.

What are we looking for

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field
• Proficiency in C# .NET, Java, or Go, with a strong understanding of software development principles in either a backend or full stack environment
• Great communication skills and ability to interact effectively with a wide range of stakeholders
• Experience working in agile environments and delivering high‑quality code within tight deadlines
• Excellent problem‑solving skills and the ability to work independently as well as part of a team
• Someone who is AI proficient or AI curious, hungry to embrace the latest technology to enhance both your and your team’s productivity
• Payments or financial knowledge is a plus, but not a necessity

How you’ll make an impact

• Collaborate with cross‑functional teams, including product management, across a large engineering community
• Define and design loosely coupled, scalable systems in a wider microservices architecture using industry best practices
• Stay up‑to‑date, use, and spread knowledge of the latest technologies used by Checkout
• Write clean, maintainable, extendable, and testable code on some of Checkout’s most impactful systems
• Build, own, and operate your systems to the highest levels of resilience and service
• Mentor junior team members and assist in their technical development

Benefits

Our hybrid working model offers flexibility, with three days per week in the office to support collaboration and connection.

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