I'm Elanchezhiyan Poosamani, a passionate Senior Full Stack Developer with 6 years of experience in crafting scalable, secure, and high-performing software solutions. My core expertise lies in: ✅ .NET Core, ASP.NET MVC, Web API, C# ✅ React, Next.js, Tailwind CSS, TypeScript ✅ Azure (App Services, CI/CD), AWS, Plesk ✅ Database design – MSSQL, MySQL, PostgreSQL, MongoDB ✅ Healthcare systems – HL7, FHIR, CCDA, e-prescriptions I’ve built solutions for health tech startups, SaaS platforms, and B2B automation systems. I lead engineering teams, manage client communications, and follow agile delivery models with a strong emphasis on clean architecture and performance. My current work includes: 🧠 Designing a longitudinal patient health record system 💳 Building Stripe-integrated subscription and invoice systems 🤖 Developing AI-based resume chatbots using LangChain + HuggingFace I'm also active on Medium, where I write tech blogs, and I enjoy mentoring developers who want to break into backend, cloud, or healthcare tech.