Hasan Uddin

I’m a Backend Developer specializing in ASP.NET Core, focused on designing scalable web applications and APIs with clean, maintainable code. I bring a strong problem-solving mindset and a backend-first approach to building reliable authentication, authorization, and data-driven services.

Currently, I work as a Junior Software Developer at UAPP.UK, continuing into 2026. I’ve led a Social Media Campaign and Client Management (CRM) effort, working with ABP Framework and ASP.NET Core (plus Node.js and PostgreSQL), including Meta Graph API, WAHA, and SMTP, along with a 2-axis multi-tenancy architecture using DDD.

In my internship at DappleSoft, I built and maintained features across the stack with ASP.NET Core, PostgreSQL, and Angular. I also apply proven architecture patterns—Clean Architecture (SOLID), DDD, and CQRS—to keep systems modular, testable, and scalable.

My standout project work includes a centralized Auth Server with an admin panel, where I implemented OAuth 2.0 and OpenID Connect SSO to reduce authentication duplication across applications. I also built secure OTP/SMS/SMTP services with admin controls, added audit logging and role-based authorization, and improved performance significantly in a POS system (15+ regular customers) using an Angular caching interceptor and SQL/database-level pagination.