Senior Software Engineer

Senior Software Engineer .NET

Contract

6 Months

£500 - £550

Remote - Must be UK based or Ireland

A SaaS payments platform is looking for an experienced .NET Developer to join on a 6-month contract. As a .Net Developer you'll be building and extending core payment processing services, transaction handling, settlement workflows, and merchant-facing APIs on a product where reliability and data integrity really matter.

What you'll be doing:

• Design, build, and maintain backend services in C#/.NET, focused on payment processing, transaction handling, and settlement workflows
• Work closely with product and platform teams to integrate payment gateways and third-party financial services providers
• Write clean, thoroughly tested, production-grade code, with reliability and data integrity front of mind given the nature of a payments product
• Help shape API design (REST/gRPC) across both internal services and merchant-facing integrations
• Take part in code reviews, technical design discussions, and ongoing CI/CD pipeline improvements
• Operate within a secure, compliance-conscious environment, with an expectation of PCI DSS awareness

What you'll need:

• Strong hands-on C# and .NET Core/.NET 6+ experience
• Solid REST API development (ASP.NET Core Web API)
• SQL Server + Entity Framework Core
• Comfortable in a cloud environment (Azure preferred)
• Payments, fintech, or other high-integrity transactional systems experience is a strong plus
• Microservices, message queues, and Docker experience desirable

To apply, send me a copy of your CV to [email protected]