Senior Software Developer (Integration)

Tranglo; Kuala Lumpur; On-site; MYR 90,000 - 150,000; Full time

Job summary

Tranglo is seeking a skilled middleware developer to bridge internal services with external APIs in a secure, scalable way.

You will design and implement C#/.NET middleware, manage secure transport (HTTPS/TLS, SFTP), and map data across JSON and XML formats while supporting ETL processes and API integrations.

Qualifications

• Proven experience with C#.NET, VB.NET, and ASP.NET.
• Experience building/rest consuming REST APIs and WCF/SOAP.
• Advanced SQL Server (T-SQL) with tuning and scripting.
• Strong JSON/XML data mapping across systems.
• OAuth2 and JWT for secure API authorization.
• TLS/HTTPS and SFTP for secure data transmission.
• Troubleshooting complex applications and root cause analysis.
• Familiar with Windows Server, IIS hosting and Windows services.

Responsibilities

• Develop robust C# middleware to bridge internal services and external APIs.
• Configure secure transport and data transmission channels.
• Manage ETL and data mapping for JSON/XML/CSV.
• Secure APIs with OAuth2/JWT and encryption.
• Troubleshoot connectivity, SOAP/REST traffic, and SQL logs.
• Design and support Web Services (WCF/REST).
• Write and optimize SQL Server stored procedures and queries.
• Collaborate across teams and participate in code reviews.
• Follow coding standards and CI/CD with API Gateway integrations.
• Produce SSRS and exportable Excel reports.

Skills

C#.NET VB.NET ASP.NET

REST APIs WCF SOAP

SQL Server T-SQL

JSON XML mapping

OAuth2 JWT

HTTPS TLS SFTP

Troubleshooting

Windows Server IIS Services

Tools

Azure DevOps

Git

Postman

SoapUI

Job description

• 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

Ready to action

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