C# Developer .Net API Full Stack

In this senior, hands-on role you will own features end-to-end, from API and service design to frontend delivery, as part of a global financial services team rebuilding the international payments platform. You will shape backend services in C# .NET and customer-facing features in Vue.js, while driving architecture decisions and production reliability. Collaborate with Product, Design, and Compliance to move ideas to production and modernise legacy services. This is a high-impact position in a corporate payments context with cross-functional influence and a focus on scalable, observable systems.

• salary up to 85k
• bonus
• 23 days holiday rising to 28 days plus birthday off
• Pension
• Life Assurance
• Income Protection" ,"Critical Illness Cover","Healthcare"),

• Own end-to-end feature delivery from API design to frontend implementation
• Design and develop scalable backend services and APIs in C# .NET
• Build customer-facing features with Vue.js frontend
• Lead architectural decisions within domain and contribute to wider direction
• Improve reliability, observability, testing and production performance
• Collaborate with Product, Design and Compliance to move features to production
• Modernise legacy services and participate in platform scaling
• Mentor others and take technical ownership across the team

• Strong C# .NET backend development experience
• Strong API, system design and distributed systems knowledge
• Experience with SQL and relational databases
• Frontend development knowledge, ideally Vue.js (React also acceptable)
• Production AWS experience including CI/CD, SQS, DynamoDB, S3, ECS or Lambda (advantageous)
• Good understanding of microservices and event-driven architectures
• Comfort with technical ownership and mentoring
• Experience in payments, financial services or regulated environments is desirable

• Ownership and leadership
• Collaboration with cross-functional teams
• Mentoring others
• C# .NET
• API design
• Distributed systems