Senior .NET Developer - Capital Markets

Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent

As a Senior .NET Developer at Capco, you will design and build high-performance platforms for leading financial services institutions. You’ll bring deep engineering expertise to cloud-based, event-driven applications that support banking, payments, and capital markets. Collaborating with stakeholders, you'll deliver scalable solutions using best-in-class technologies and contribute to Capco’s engineering community.

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  Build modern .NET-based solutions across financial domains (banking, payments, wealth, capital markets)

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  Implement secure, scalable systems using AWS and distributed architecture patterns

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  Apply TDD and SOLID principles to create maintainable, high-performance applications

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  Develop RESTful and GraphQL APIs integrated with cloud-native and legacy systems

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  Work collaboratively with cross-functional teams and share engineering knowledge across Capco

• Proficiency in C# (7.0/8.0) & .NET with enterprise software development experience 

• Strong understanding of trade lifecycle processes and financial instruments (Options, Derivatives, Rates)

• Strong database design skills using SQL Server or NoSQL technologies

• Cloud expertise with AWS (DocumentDB, EKS, EC2, S3, Aurora, CloudFront, Route 53)

• Familiarity with Redis, Elasticache, and secure API design (REST/GraphQL)

• Passion for innovation and contributing to thought leadership

• Experience coaching junior developers and supporting agile delivery

• Knowledge of financial regulations and compliance requirements

• Effective communicator with both technical and non-technical stakeholders

• Curiosity and drive to explore emerging technologies and solutions