Salary: £30,000 - 60,000 per year Requirements: Proven industry experience developing backend applications with .NET and C# Practical experience building and deploying solutions in AWS Exposure to distributed architectures and event-driven design patterns Strong knowledge of relational databases (e.g., SQL Server, PostgreSQL) Experience working within Agile or Lean delivery teams Familiarity with Docker and Kubernetes for containerised deployments Experience contributing to automated build and release pipelines Strong analytical skills with the ability to navigate complex technical challenges Effective communicator who works well in collaborative environments Responsibilities: Design and implement backend services using C# and the .NET ecosystem Develop and maintain cloud-native applications within AWS environments (including serverless architectures) Collaborate within cross-functional feature teams alongside experienced engineers and technical leaders Contribute throughout the full software lifecycle from initial design to production support Build systems with strong attention to scalability, resilience, performance, and security Partner with architecture, product, QA, and DevOps to deliver reliable releases Investigate and resolve production issues as part of ongoing platform support Enhance developer workflows through CI/CD, automation, and improved tooling Support and mentor team members via code reviews and knowledge sharing Technologies: AWS Backend C# CI/CD Cloud DevOps Docker Support Kubernetes PostgreSQL SQL Security Serverless ASP.NET Azure GCP More: We are hiring a Senior Software Engineer to join our well-established payments engineering function in Belfast, with a hybrid working model offering flexibility. Our engineering culture is built around Lean principles and strong technical guidance, dedicated to delivering high-volume, mission-critical platforms. In this role, you will focus on developing cloud-first .NET services that underpin our core platform capabilities. Join us to contribute to high-traffic payment systems, be part of a structured engineering team with clear leadership, and engage in long-term quality hiring and sustainable team development. last updated 11 week of 2026