Backend Software Engineer C# .Net AWS

Backend Software Engineer / Developer (C# .Net API SQL) Bracknell / WFH to £85k

Opportunity for Senior Backend Engineer to join a major rebuild of a leading international payments platform, working within the Corporate Payments division.

As a Backend Software Engineer you’ll join a small, autonomous engineering team of around 4-6, including QA and a Team Lead, helping to modernise backend services and build the next generation of the platform. This is a hands-on role with genuine technical ownership, where you’ll lead the delivery of new capabilities and contribute to the evolution of the underlying architecture.

Your role:

• Design and implement robust, scalable APIs and backend services using C# .Net Core
• Modernise existing services and contribute to the rebuild of the Corporate Payments platform
• Lead delivery of new features and technical projects from design through to production
• Apply system design and architectural principles, including microservices and event driven architecture
• Design and optimise SQL databases and queries
• Write, maintain and improve automated tests, ensuring high standards of quality
• Work with AWS or other cloud platforms in production environments
• Leverage AI development tools including Claude and GitHub Copilot to improve engineering productivity
• Mentor other engineers and contribute to technical best practice

• You have strong C# .Net Core backend development experience
• You have experience building production APIs
• You have good SQL skills
• You have experience with system design, software architecture, microservices and event driven systems
• You’re comfortable working with cloud infrastructure in production; AWS preferred
• You have experience mentoring engineers and sharing technical knowledge
• You have hands-on experience using AI coding / development tools such as Claude or Copilot
• Finance / payments experience is desirable, but not essential