Senior Software Developer (Integration)

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.

Requirements

• 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