VANRATH are partnering with a global FinTech company to recruit for a Principal Software Engineer to join a high-performing technology team. This is a fantastic opportunity to work on business-critical platforms used by major players in the global market. As the Principal Software Engineer you will have the opportunity to work on modern cloud-native platforms using .NET, AWS, while shaping the engineering culture of a forward-thinking team. What You'll Do Mentor engineers and align development with project goals and timelines Design, build, and maintain software solutions Collaborate with BAs and PMs to shape and refine technical requirements Implement Infrastructure as Code (IaC) using AWS CDK (Python) Maintain CI/CD pipelines and drive code quality through unit testing Ensure security, performance, and availability of cloud-based systems Participate in agile ceremonies and promote a strong agile culture Document technical designs, processes, and system architecture What We're Looking For Proven experience as a Principal .NET Engineer (finance sector a plus) Strong AWS knowledge with hands-on IaC (CDK + Python) Solid experience with unit testing, CI/CD, and agile methodologies Familiarity with Entity Framework, contract-first design, and microservices Nice to Have Docker, Kubernetes exposure Experience with relational/NoSQL databases Git, JIRA, and strong documentation skills Benefits A highly competitive salary package Annual bonus and performance incentives Generous pension and private medical insurance Hybrid working model (3 days in office) And many more! For further information on this vacancy, or any other IT roles in Belfast or wider Northern Ireland, please apply via the link below or contact Jarlath O'Rourke on in the strictest confidence. Skills: .Net C# Aws React Javascript