Sunil K.

Senior .NET Developer with 10+ years of experience building secure, scalable enterprise applications, SaaS platforms, backend APIs, and cloud-based systems using C#, .NET Core, ASP.NET Core, Azure, SQL Server, React, Angular, and modern software architecture. I help startups, SaaS companies, and enterprises build new applications, modernize legacy .NET systems, develop robust APIs, and deploy scalable solutions on Microsoft Azure. Alongside enterprise development, I specialize in AI SaaS Development, AI Workflow Automation, AI Agent Development, and AI Integration. Using LLMs, Claude, Python, and LangGraph, I build AI-powered products, intelligent agents, and automated workflows that reduce manual effort and solve real business problems. I help businesses move beyond AI experimentation by turning their ideas into practical applications, integrating LLMs into existing products, automating repetitive processes, and building intelligent systems around their business needs. My experience covers the complete application lifecycle, from architecture and database design to backend and frontend development, cloud deployment, API integrations, security, CI/CD, and performance optimization. For AI projects, this includes LLM integration, agent orchestration, RAG systems, and AI-powered business applications. What I Can Help You Build: ✔ AI SaaS Development: AI-powered SaaS platforms, LLM applications, intelligent business tools, and scalable AI products. ✔ AI Workflow Automation: Automate business processes using LLMs, Claude, Python, LangGraph, and intelligent workflows. ✔ AI Agent Development: Custom AI agents and multi-agent systems using LLMs, tools, APIs, and contextual information to execute tasks and support business operations. ✔ AI Integration & RAG: Integrate AI into existing products, build knowledge assistants, document processing systems, and retrieval-augmented generation (RAG) applications. ✔ LLM-Powered Applications: Build applications using LLM APIs, prompt engineering, tool calling, contextual retrieval, and structured AI outputs. ✔ Full-Stack .NET Applications: C#, .NET Core, ASP.NET Core, Web API, React, Angular, TypeScript, and Blazor. ✔ SaaS & Multi-Tenant Applications: Secure SaaS platforms with tenant management, dashboards, subscriptions, role-based access, and scalable architecture. ✔ API & Backend Development: REST APIs, third-party integrations, authentication, authorization, and enterprise backend services. ✔ Legacy .NET Modernization: Upgrade legacy .NET Framework applications to modern .NET and ASP.NET Core architectures. ✔ Azure Cloud & DevOps: Azure App Services, Azure Functions, Azure DevOps, Docker, Kubernetes, and CI/CD pipelines. ✔ Enterprise Architecture: Clean Architecture, Domain-Driven Design, CQRS, SOLID, microservices, and event-driven systems. Core Technology Stack: AI & Automation: LLMs, Claude, Python, LangGraph, AI Agents, Multi-Agent Systems, RAG, LLM APIs, Prompt Engineering, Tool Calling, AI Workflow Automation. Backend: C#, .NET Core, .NET 6/7/8, ASP.NET Core, Web API, REST APIs, GraphQL, Entity Framework Core, LINQ, Dapper, SignalR. Frontend: React, Angular, JavaScript, TypeScript, Blazor. Cloud & DevOps: Microsoft Azure, Azure Functions, Azure App Services, Azure DevOps, Docker, Kubernetes, CI/CD. Databases: SQL Server, Azure SQL, PostgreSQL, MySQL, MongoDB. Architecture: Clean Architecture, DDD, CQRS, SOLID, Microservices, Event-Driven Architecture. Security & Compliance I follow a security-first approach, considering security, privacy, and compliance throughout architecture and deployment. -HIPAA & Healthcare Security -GDPR & Data Privacy -SOC 2 Security Principles -OWASP Top 10 Protection -OAuth, JWT, SSO, MFA & RBAC -API Security and Data Isolation -Encryption, Audit Logging & Secrets Management -Secure SDLC and Vulnerability Prevention Selected Project Experience: - Property Management SaaS: Built a multi-tenant platform with tenant management, dashboards, reporting, business workflows, and secure access using .NET Core, React, Angular, Azure, and SQL Server. -Employee PDP Management System: Developed planning modules, approval workflows, reporting, authentication, and authorization for enterprise workforce management. -School Management Platform: Built a .NET Core application with teacher and student portals, scheduling, administration dashboards, and business workflows using Clean Architecture and MySQL. -Enterprise Internal Systems: Integrated applications with Azure AD, SharePoint, HR platforms, insurance systems, and third-party APIs. -API & Payment Integrations: Implemented Stripe, PayPal, CRM, and enterprise API integrations with secure authentication and reliable error handling. My Approach I focus on understanding business requirements, technical constraints, and scalability needs before selecting the right solution. Have a project in mind? Send me your requirements, and let's discuss the best approach.