vishnu kumar

• Developed and maintained 10+ enterprise-grade software modules
across the hospitality and financial sectors using .NET Core,
WinForms, and REST APIs.
• Engineered DLL-based extensions integrating Oracle Simphony POS
with third-party platforms, supporting high-volume daily
transactions.
• Designed and deployed secure API integrations using token-based
authentication (JWT/Bearer), ensuring data security and
compliance.
• Led POS-to-ERP integrations with SAP and Oracle NetSuite using
RESTful and SOAP APIs, automating financial data synchronization
and reducing manual reconciliation efforts by 60%.
• Optimized SQL queries across PostgreSQL, Oracle, and SQL Server,
improving report performance by 30-40%.
• Reduced production issues and enhanced system efficiency by
refactoring legacy code and optimizing database access.
• Configured structured logging and monitoring using Serilog to trace
production issues and improve incident response efficiency.

• Built web applications using ASP.NET MVC, .NET Core, C#, and
JavaScript, and consumed RESTful APIs.
• Utilized Entity Framework and LINQto manage data operations
across SQL Server and PostgreSQL.
• Involved in all stages of the SDLC: requirements gathering, system
design, development, testing, and deployment.