Software Developer (Integration) (.net)

Key Responsibilities: Develop robust C# middleware to bridge the gap between internal services and external APIs. Experience managing secure transport layers such as HTTPS, mTLS, and SFTP for reliable financial data transmission. Managing ETL processes and mapping data between different formats like JSON, XML, and CSV. Expertise in securing financial APIs using mTLS for server-to-server trust, OAuth2/JWT for identity management, and data encryption. Troubleshoot complex connectivity issues, analysing SOAP/REST traffic and SQL logs to resolve transaction failures. Design, develop, and support Web Services (WCF, RESTful APIs). Develop and optimize SQL Server stored procedures, functions, and complex queries as well as performance fine tuning. Understand with ISO 20022 (XML) and ISO 8583 financial messaging frameworks. Support and troubleshoot production issues with effective root cause analysis. Collaborate across teams on various product lines to ensure seamless integration and functionality. Follow coding standards, documentation practices, and maintain clean code with tools like SonarQube. Collaborate with DevOps for CI/CD and API Gateway integrations in microservices architecture. Write and maintain SSRS reports and exportable Excel reports. Participate in code reviews, architectural discussions, and technical mentoring. Technical Skills & Experience: Required: Strong in C#.NET, VB.NET, ASP.NET. Expertise in building and consuming REST APIs and WCF (SOAP). SQL Server – advanced T-SQL, performance tuning, scripting. Deep proficiency in JSON and XML for cross-system data mapping. Hands-on experience with OAuth2 and JWT for secure API authorization. Strong understanding of HTTPS/TLS and SFTP for reliable and encrypted data transmission. Troubleshooting and debugging complex applications. Familiar with Windows Server, Hosting IIS web application and Window Services Preferred / Good to Have: Microservices architecture and API Gateway. CI/CD pipelines, Git, Azure DevOps or similar. Experience in using Postman/SOAP UI or similar API mocking tools. Experience in .NET 8/10 is a plus. Understanding of messaging standards such as ISO 20022 and ISO 8583