Senior C# Software Engineer

Sorry, this job was removed at 03:14 p.m. (CST) on Monday, Apr 14, 2025
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London, England
Hybrid
Cloud • eCommerce • Fintech • Payments • Financial Services
We enable businesses and their communities to thrive in the digital economy.
The Role

Company 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, Hut Group, Sony Electronics, Homebase, Henkel, 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 Senior Software 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, you will lead and drive specific projects critical to Checkout's needs with opportunities to switch teams and projects as you and our fast-paced business grow and evolve. We need our engineers to be versatile, display exceptional leadership qualities and be enthusiastic to take on new problems across the full-stack as we continue to push technology forward. Across the business we primarily use C# .NET Core, hosted on AWS with event-driven microservices. With your technical expertise you will lead project priorities, deadlines, and deliverables. You will design, develop, test, deploy, maintain, and enhance software solutions.

Responsibilities:

  • Collaborate with our multidisciplinary team to own and deliver key features
  • Assist in requirements identification and in producing specifications
  • Build and maintain a development environment for efficient testing and integration
  • Define and create acceptance tests to be automated
  • Support the creation and maintenance of technical documentation
  • Participate in team knowledge management and make recommendations for continuous improvement of SDLC
  • Contribute to and enforce our API coding standards, best practices, and procedures

Qualifications

  • Programming experience in C#
  • A willingness to learn new skills and using the best tools for the job
  • Experience in Software Development, Design, and Architecture, with security in mind
  • Excellent practical knowledge of OOP concepts and SOLID principles
  • Solid understanding of HTTP and RESTful design
  • Experience with asynchronous, event-driven architecture
  • Database experience with SQL and NoSQL
  • Experience with Continuous Integration and Deployment workflows
  • Cloud-based application development experience
  • Superb communication skills, ability to interact effectively with multidisciplinary teams

    How you’ll make an impact:

  • Be part of, and collaborate with, cross-functional teams including product management, across a large engineering community.
  • Define and design loosely coupled, scalable systems in a wider microservices 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.

Additional Information

Hybrid Working Model: All of our offices globally are onsite 3 times per week (Tuesday, Wednesday, and Thursday). We’ve worked towards enabling teams to work collaboratively in the same space, while also being able to partner with colleagues globally. During your days at the office, we offer amazing snacks, breakfast, and lunch options in all of our locations.

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

  • Our Culture video https://youtu.be/BEwnpHuadSw
  • Our careers page https://www.checkout.com/careers
  • Our LinkedIn Life pages bit.ly/3OaoN1U  
  • Our Instagram https://www.instagram.com/checkout_com/

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The Company
England
2,000 Employees
Year Founded: 2012

What We Do

We’re Checkout.com. We work with global companies like eBay, ASOS, Klarna, Uber Eats, and Sony, to power their payments from behind the scenes. With a global digital network and extensive expertise, our mission is to help businesses thrive with high-performing payments. Because when payments just work, businesses grow, customers stay, and no one stops to think about why.

We have the energy of a start-up on a global scale, with 19 offices across six continents and a HQ in London. All of our people are driven, ambitious, and performance-obsessed, because working here is a chance to grow faster than anywhere else, and build the future of fintech.

Find out more about our team here: https://www.checkout.com/careers

Why Work With Us

We empower passionate problem-solvers to collaborate, innovate and do their best work.

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