Capco, a leading global technology and business consultancy specializing in financial services, is seeking a Principal .NET Developer for their Capital Markets division in London. This role represents an opportunity to work with some of the largest banks in the world on transformative projects. The position requires deep expertise in C# development, Capital Markets knowledge, and cloud architecture skills, particularly AWS. You'll be responsible for designing and developing robust data pipelines, building distributed applications, and implementing both cloud and on-premise solutions. The ideal candidate will have extensive experience in enterprise-level solutions within Capital Markets, strong database knowledge, and expertise in modern development practices including TDD and API development. Capco offers a collaborative, non-hierarchical environment with strong emphasis on professional growth and work-life balance. They provide comprehensive benefits including family-friendly policies and ongoing learning opportunities. The role combines technical leadership with business domain expertise, making it ideal for senior developers looking to impact the financial services industry while working with cutting-edge technologies.