Raj Narayan G.

Need a Senior .NET Developer to build, fix, modernize, optimize, or scale your application? I’m a Senior Full Stack .NET Developer with 6+ years of experience building and supporting production applications across ASP.NET Core, C#, SaaS, APIs, microservices, React, Next.js, Angular, databases, AWS, Azure, DevOps, AI integrations, desktop software, and hardware-connected systems. 🚀 What I Can Help With ✔ ASP.NET Core, C#, .NET 6/7/8/9/10 ✔ ASP.NET Core MVC, Razor Pages & Web API ✔ SaaS & Multi-Tenant Applications ✔ Microservices, CQRS, MediatR & Clean Architecture ✔ EF Core, Dapper, LINQ & SQL Optimization ✔ React, Next.js, Angular, JavaScript & TypeScript ✔ Node.js / Express.js & MERN Stack ✔ REST APIs & Third-Party Integrations ✔ Authentication, Authorization, JWT & OAuth ✔ Bug Fixing & Production Troubleshooting ✔ Performance Optimization & Code Refactoring ✔ Legacy .NET Modernization ✔ AWS & Microsoft Azure ✔ Docker, GitHub Actions, Jenkins & CI/CD ✔ AI / LLM / Agentic AI Integrations ✔ WPF & WinForms Applications ✔ Hardware, IoT & Device Integrations ✔ Ongoing Development & Maintenance 🔧 Existing Application Support I can step into an existing .NET, React, Angular, Node.js, SQL Server, PostgreSQL, MySQL, or MongoDB codebase, understand the architecture and business logic, find the root cause of issues, and implement clean improvements without unnecessary rewrites. I can help with slow APIs, database performance, difficult bugs, new features, security, API integrations, deployment issues, cloud migration, technical debt, and ongoing support. ☁️ Cloud & DevOps Hands-on experience with: AWS: EC2, ECS, ECR, ALB, S3, SES, Route 53, RDS, VPC Azure: App Services, Azure SQL, Storage, Functions, Key Vault DevOps: Docker, GitHub Actions, Jenkins, Linux, IIS, Nginx, CI/CD 🗄️ Databases SQL Server | PostgreSQL | MySQL | MariaDB | MongoDB | Redis I work with database design, complex queries, stored procedures, indexing, migrations, caching, multi-tenant data, and performance tuning. 🤖 AI & Agentic AI I can integrate practical AI capabilities into existing applications using: ✔ OpenAI / ChatGPT ✔ Azure OpenAI ✔ Gemini & Claude ✔ AI Chatbots & Assistants ✔ RAG & Vector Search ✔ Embeddings & Semantic Search ✔ Structured Outputs ✔ Tool / Function Calling ✔ AI Agents ✔ Workflow Automation ✔ AI-powered CRM / ERP integrations My focus is on using AI for real business workflows, not just demos. 🏢 SaaS & Business Applications I have experience with multi-tenant SaaS, CRM, ERP, booking systems, restaurant platforms, school management, inventory, subscriptions, role management, payments, dashboards, notifications, reporting, and admin portals. 🔌 API & Integration Experience Google APIs | Microsoft Graph | Outlook | OAuth | Razorpay | Stripe | Twilio | WhatsApp | Webhooks | Email APIs | Custom REST APIs 🖥️ Desktop, Hardware & IoT I also have experience with WPF and WinForms applications connected to hardware such as: • ATM/Kiosk devices • Bill acceptors and cash dispensers • Receipt printers and card readers • RFID and barcode systems • Vehicle tracking devices • TCP/IP systems • ESP32 and sensor integrations • Temperature, vibration and RPM monitoring • Offline-first and synchronization systems 🏗️ Architecture & Technical Support I can help with application architecture, API design, database architecture, microservices, SaaS design, scalability, security, performance, cloud architecture, technical debt, deployment strategy, and production troubleshooting. 💼 Why Work With Me? ⭐ 6+ years of software development experience ⭐ Strong ASP.NET Core / C# expertise ⭐ Full-stack React / Next.js / Angular experience ⭐ SaaS & multi-tenant development ⭐ AWS & Azure experience ⭐ AI / Agentic AI development ⭐ Strong API & database experience ⭐ Hardware & IoT integration experience ⭐ Production debugging & performance optimization ⭐ Clean, maintainable and scalable development ⭐ Clear communication and long-term support If you’re looking for a Senior .NET Developer, ASP.NET Core Developer, C# Developer, Full Stack Developer, SaaS Developer, API Developer, Azure/AWS Developer, AI Integration Developer, or Agentic AI Developer, feel free to send me your project details. I can help you build, improve, troubleshoot, modernize, and deploy a reliable production-ready solution.