GUNASEELAN M

Architected and developed enterprise-grade full stack web applications from the ground up using C#, ASP.NET MVC, ASP.NET Core Web API, and .NET Core 6/7/8, serving 5,000+ users across the Microsoft technical stack. Designed and implemented RESTful Web APIs and 3rd-party API/webservice integrations using ASP.NET Core Web API, Entity Framework Core, and LINQ, translating business requirements into scalable technical solutions. Implemented Jenkins-based CI/CD pipelines for automated build, test, and deployment of .NET applications. Deployed and managed applications on AWS (EC2, S3) and Linux/IIS servers, applying multi-platform solution architecture principles to ensure high availability and performance. Implemented JWT authentication, role-based authorization, and OWASP Top 10 secure coding practices to design and architect highly secure, scalable, and performing applications. Designed and optimized MS SQL (SQL Server) database schemas and performed advanced SQL query scripting, along with PostgreSQL and MySQL database design and optimization. Built and maintained front-end components using Angular, JavaScript, and jQuery, collaborating cross-functionally to deliver multi-platform, full stack solutions. Performed unit testing (xUnit/NUnit), debugging, performance tuning, and production support, applying design patterns and Dependency Injection via the built-in ASP.NET Core IoC container to improve code quality and testability