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I am having experience of 7+ years in the development of .Net large-scale applications In .NET Core. I am also an expert in Blazor & MAUI. Already worked with .NET 8 and 9 and have good understanding in .NET 10. I have worked with Fulltime NET Developer for both MVC and NET Core. Here are some of my skills and qualities: Posse’s strong knowledge of Technologies like .NET CORE, C#, ReactJS, NodeJS, Blazor, ADO.Net, MVC, Linq to SQL, Entity Data Model, .NET 8, Python, flask and Django Databases: MSSQL, SQL Server Azure: Azure AD, Azure DevOps, Azure Table, IaaS, PaaS, Containers, Storage, Azure Monitoring, Security, Azure SQL, AppService, Logic Apps, Functions, Azure API and other Serverless services Management: Azure Service bus, Azure Event Hub, Azure Batch, Azure App Services, Docker, Kubernetes Messaging Broker: RabbitMQ Caching: Redis Containerization: Azure Functions. Authentication: OAuth, Microsoft Authentication Front-end tools: HTML, Jquery, JavaScript, Bootstrap, XML,chronologies, and AJAX methodologies. Monitoring: Application insights. Project management tools: Jira, Basecamp, Trello, Asana Scripting Languages: JavaScript Hosting: AWS Azure Other Tools: GIT, TFS, Bitbucket, Devops Primary Skills (Core Stack): - Full Stack Developer - .NET Developer - ASP.NET Core Developer - C# Backend Developer - React.js Developer - Angular Developer - Blazor Developer - MAUI App Developer - .NET MAUI Developer - Web API Developer - Entity Framework Core - Razor Pages - SignalR Developer Frontend Technologies: - JavaScript Developer - TypeScript Developer - HTML5 / CSS3 / SCSS - Responsive Web Design - Tailwind CSS - Bootstrap - React Hooks - Angular Material - RxJS - Material UI (MUI) Backend / Server-Side - ASP.NET Core Web API - RESTful API Development - Microservices Architecture - Clean Architecture - Dependency Injection - Middleware in .NET - LINQ / EF Core - SQL Server / PostgreSQL / MySQL - IdentityServer / JWT Authentication Version Control & Tools: - Git / GitHub / GitLab / Bitbucket - Azure DevOps Pipelines - Jira / Trello / ClickUp - Visual Studio 2022 - Postman / Swagger - Figma to React/Angular Testing & Quality: - Unit Testing in .NET (xUnit, MSTest) - Jest for React - Cypress / Selenium - Playwright - Code Review & Refactoring Cloud & DevOps: - Azure Developer - AWS Developer - Azure App Services - Azure Functions - AWS Lambda - CI/CD (GitHub Actions, Azure DevOps) - Docker - Kubernetes - Softr - Cloudflare I am also Responsible for implementing security using OAuth within REST Api (WebAPI 2).

Your .NET system is either scaling or slowing you down. After 10 years and 3,000+ hours across production systems - I know which one yours is within the first conversation. Top Rated Plus · $30K+ earned · 8 completed jobs · 3,000+ hours. You work directly with me. ──────────────────────────────── WHAT I DELIVER ──────────────────────────────── ✔ ASP.NET Core & C# backend - clean architecture, Minimal APIs, EF Core, REST & GraphQL ✔ React.js & Next.js frontend - TypeScript, Redux Toolkit, TanStack Query, Tailwind, shadcn/ui ✔ Angular enterprise apps - TypeScript, RxJS, NgRx, Material UI, complex SPAs ✔ Node.js & Express backend - REST APIs, WebSockets, real-time systems ✔ Full stack MEAN & MERN - end to end, architecture to production ✔ Legacy .NET modernization - .NET Framework to ASP.NET Core, zero downtime migrations ✔ Real-time systems - SignalR, WebSockets, live data applications ✔ Cloud deployments - Azure, Google Cloud, GKE, Docker, Kubernetes, Helm ✔ CI/CD pipelines - GitHub Actions, GitLab CI/CD, ArgoCD, automated testing ✔ Database architecture - PostgreSQL, SQL Server, MongoDB, Redis, query optimization ✔ Testing & quality - Vitest, Playwright, xUnit, Testcontainers, MSW, OpenAPI/Swagger ✔ Monorepo tooling - Nx, Turborepo, Vite, modular architecture ──────────────────────────────── HOW I WORK ──────────────────────────────── ✔ Short sprints - clear scope and acceptance criteria before writing one line of code ✔ CI/CD + staging set up from day one - not bolted on at the end ✔ Proactive updates at every milestone - no chasing, no surprises ✔ Clean handover - solid docs, maintainable code, nothing left unexplained ✔ I flag what will break next - not just what you asked me to fix ──────────────────────────────── WHY CLIENTS CHOOSE ME ──────────────────────────────── ✔ Top Rated Plus - top 3% of Upwork freelancers ✔ 100% Job Success Score ✔ $30K+ earned · 3,000+ hours · 8 completed jobs ✔ 10 years across .NET, React, Angular, Node.js ✔ You work directly with me - no handoffs, no juniors, no surprises ✔ Delivered on time, explained in plain English, available when you need me ──────────────────────────────── REACH OUT IF YOU NEED TO ──────────────────────────────── → Build a production .NET or React application the right way from the start → Modernize a legacy .NET system before it breaks under load → Add a senior full stack developer who owns the architecture end to end → Fix performance issues or bad architecture before it costs you → Ship an MVP fast without sacrificing code quality Share your project. I'll reply with a plan, timeline, and a fair fixed or hourly option. ──────────────────────────────── SPECIALIZATIONS ──────────────────────────────── ASP.NET Core Developer · C# Developer · .NET Core Developer · Full Stack .NET Developer · React Developer · Angular Developer · Next.js Developer · Node.js Developer · TypeScript Developer · GraphQL Developer · REST API Developer · SignalR Developer · Azure Developer · Docker Developer · Kubernetes Developer · PostgreSQL Developer · SQL Server Developer · MongoDB Developer · Full Stack Developer · Backend Developer ·MEAN Stack Developer · MERN Stack Developer ·Legacy Migration Developer · SaaS Developer ·Enterprise Developer · CI/CD Developer ·Real-time Application Developer Senior .NET Developer Upwork Full-Stack .NET Developer Upwork ASP.NET Core Developer Upwork ASP.NET MVC Developer Upwork C# Developer Upwork .NET Core Developer Upwork .NET Backend Developer Upwork .NET API Developer Upwork REST API Developer Upwork Microservices Developer Upwork Enterprise Application Developer Upwork SaaS Application Developer Upwork Cloud Application Developer Upwork Azure .NET Developer Upwork SQL Server Developer Database Architecture Specialist Performance Optimization Specialist Software Maintenance & Support Application Migration & Upgrade Services Third-Party Integration Specialist Skill Keywords ASP.NET Core C# .NET Core MVC Web API Entity Framework Core SQL Server Azure SQL Microservices RESTful APIs SignalR Blazor Azure AWS Docker CI/CD Pipelines Agile Development Responsive Web Design Frontend Development Backend Development Database Management Scalable Architecture Cloud Deployment Integration Keywords Amazon SP API Integration | Burp Suite Integration | Stripe Integration | Payment Gateway Integration | Third-Party API Integration

Need a reliable .NET expert to architect scalable web APIs, modernize legacy codebases, or build enterprise-grade software from scratch? I help product teams and startups ship robust, secure, and scalable applications using Microsoft’s .NET ecosystem combined with modern frontends like ReactJS. Top Rated Plus | Full Stack Web Developer | 13+ Years Experience How I Help Businesses Scale: •Architect high-performance backend systems using .NET Core & Clean Architecture • Refactor and modernize legacy ASP.NET MVC apps into scalable microservices • Build secure, testable REST APIs with optimized database performance • Seamlessly integrate React JS with .NET backend for full-stack delivery • Lead DevOps setups on Azure with CI/CD for faster go-to-market Tech Stack: • Backend: ASP.NET Core MVC/Web API, .NET 6/7, EF Core, ADO.NET • Frontend: React.js, JavaScript, jQuery • Architecture: Microservices, Clean Architecture, DDD, CQRS, SOLID • Database: SQL Server, Query Optimization, Stored Procedures • DevOps: Azure, Git, Bitbucket, CI/CD, IIS • Reporting: SSRS, Crystal Reports Client Success Snapshots: • Migrated monoliths to microservices → Improved response time by 40% • Applied Repository, Mediator, and Unit of Work for testable, scalable APIs • Delivered secure, high-speed APIs for fintech and healthcare platforms • Upgraded ASP.NET MVC apps to modern .NET Core codebases • Boosted frontend responsiveness by 2x with React JS modernization "I don’t just build apps, I engineer scalable ecosystems ready for future growth." Let’s discuss your next project and turn your vision into robust code. #AspNetCore #DotNetCore #Microservices #WebAPI #CSharp #ReactJS #SQLServer #CleanArchitecture #DesignPatterns #EntityFramework #FullStackDeveloper #AzureDevOps #SoftwareEngineering

Full Stack Senior .NET Developer and .NET Architect specializing in SaaS application development, enterprise software architecture, backend engineering, and scalable cloud solutions. With years of practical experience, I build secure, high-performance web platforms using .NET, ASP.NET Core, Azure, SQL Server, and JavaScript frameworks, helping businesses launch reliable digital products faster. ⚙️ Backend Expertise 🌳 .NET Framework, ASP.NET Core, C# 🌳 Scalable REST API Development, Backend Integration 🌳 Microservices, Distributed Systems 🌳 Secure Authentication & Authorization using JWT, OAuth 🌳 Role-Based Access Control, Identity Management 🌳 Clean Architecture 🖼️ Frontend Expertise 🔸 .NET MAUI, Avalonia UI, Blazor, Razor Pages 🔸 Vanilla JavaScript Expert 🔸 ReactJS, NextJS, AngularJS 🔸 Responsive Web Design 🔸 HTML5, CSS3, Bootstrap, Tailwind CSS 🔸 AJAX & REST API Integration 🔸 UI/UX Implementation 🛢 Database Expertise 🌿 Database Architecture 🌿 SQL Server Performance Tuning 🌿 MSSQL, MySQL, PostgreSQL 🌿 Azure SQL, MongoDB, ElasticSearch 🌿 Query Optimization and Data Modeling 🌐 Domain Expertise 🔸 Healthcare Application Development 🔸 SEO Platforms and Marketing Tools 🔸 Cybersecurity Software Solutions 🔸 E-Commerce Platforms 🔸 SaaS Products ☁️ Cloud Expertise 🌱 Microsoft Azure, AWS, Google Cloud Infrastructure 🌱 Nginx Configuration 🌱 Docker, DevOps, CI/CD Pipelines, and Release Automation 🌱 Microsoft Azure Services 🌱 Application Performance Optimization 🌱 Monitoring, Logging, and Reliability Engineering 💼 Services I Provide 🔸 Custom SaaS Product Development from MVP to Production Release 🔸 Enterprise Web Application Development with Secure and Scalable Architecture 🔸 REST API Development, Third-Party Integrations, and Backend Modernization 🔸 Modern Frontend Interfaces with Clean UX and Responsive Design 🔸 Cloud Hosting, Infrastructure Optimization, and Deployment Automation 🔸 Ongoing Product Maintenance, Feature Expansion, and Technical Support 🌟 Recent Integrations 🌲 Amazon SP API / MWS Migration 🌲 Burp Suite Automation / ZAP Integration 🌲 Stripe / PayPal / Razorpay / SlimCD 🌲 OpenAI / Claude / Gemini APIs Keywords Senior .NET Developer Upwork Fractional CTO Upwork Full-Stack .NET Developer Upwork ASP.NET Core Developer Upwork ASP.NET MVC Developer Upwork C# Developer Upwork .NET Core Developer Upwork .NET Backend Developer Upwork .NET API Developer Upwork REST API Developer Upwork Microservices Developer Upwork Enterprise Application Developer Upwork SaaS Application Developer Upwork Cloud Application Developer Upwork Azure .NET Developer Upwork SQL Server Developer Upwork Database Architecture Specialist Upwork Performance Optimization Specialist Upwork Software Maintenance & Support Upwork Application Migration & Upgrade Services Upwork Third-Party Integration Specialist Upwork Core Skills ASP.NET Core, .NET Framework, C#, .NET Core, MVC, Web API, Entity Framework Core, SQL Server, Azure SQL, Microservices, RESTful APIs, SignalR, Blazor, Azure, AWS, Docker, CI/CD Pipelines, Agile Development, Responsive Web Design, Frontend Development, Backend Development, Database Management, Scalable Architecture, Cloud Deployment.

Hello, 🎯 I am a Professional AI-Native Full-Stack developer with over a 6 years of experience designing and deploying scalable enterprise solutionsf from the scratch. My journey is rooted in transforming complex business requirements into high-performance, AI-driven applications. Having successfully worked on large development teams through critical digital modernizations including custom SaaS platforms, AI-Native Automation systems, and Telehealth infrastructure - I bridge the gap between legacy reliability and modern AI-native velocity. 🛠 My Technical Fluency =========================================================================== ✅ Frontend: Angular, React, Angular Core, Angular 2+, Angular Universal, NGRX, Next, Remix ✅ Backend: ASP.NET Core, C#, ASP.NET, .NET Web API, Entity Framework, SignalR, TypeScript, ✅ Database: SQL Server, PostgreSQL, Redis, MongoDB, Supabase, AWS ✅ Cloud & DevOps: Microsoft Azure (Certified), Docker, Kubernetes, CI/CD pipelines, GitHub Actions. ✅ AI-Native & Vibe Coding Tools: Cursor, Claude, GitHub Copilot, Windsurf, Replit Agent, and custom LLM orchestration. ✅ Testing: xUnit, NUnit, Playwright, Jest, Cypress. 🌟 What I Am Born to Deliver =========================================================================== 👉 Systems designed for long-term maintainability, not just quick fixes. 👉 Translating ambiguous business goals into precise, actionable technical specifications. 👉 Delivering consistent, high-quality milestones through AI-accelerated workflows. 👉 Identifying bottlenecks and security vulnerabilities before they impact production. 👉 Maintaining clear, proactive communication that keeps stakeholders informed and confident. 👉 Building systems that handle growth from MVP to enterprise-grade traffic. 👉 Ensuring technology serves the specific functional needs of your unique business model. 🏆 My Priorities for Every Project =========================================================================== 🌟 Ensuring absolute reliability and security of your user information. 🌟 Aggressive reduction of latency to ensure a seamless end-user experience. 🌟 Prioritizing readability and modularity to reduce future technical debt. 🌟 Aligning every interface component with intuitive user behavior patterns. 🌟 Maintaining comprehensive, living documentation for seamless knowledge transfer. 🌟 Architecting infrastructure to optimize cloud resource utilization and reduce overhead. 🌟 Implementing industry-standard security protocols across every layer of the stack. 📌 Industries I Serve =========================================================================== 🚀 Solar Energy & Renewables 🚀 Manufacturing & Industrial Processing 🚀 Healthcare & Telehealth Infrastructure 🚀 E-commerce & Retail Giants 🚀 Legal Technology & Services 🚀 Architecture & Engineering Agencies 🚀 Financial Services & SaaS Startups 🚀 Education Technology (EdTech) 🚀 Enterprise CRM & Resource Planning 🤝 My Strategies to Cut Development Time =========================================================================== My development philosophy leverages an AI-native stack to accelerate the entire software lifecycle. I utilize Cursor and Claude to generate boilerplate, refactor complex modules, and automate unit test generation, which allows me to focus on architectural judgment rather than syntax. For backend management and documentation, I employ automated context-mapping tools that ensure all team members stay aligned without constant overhead. By integrating these systems into a unified workflow, I consistently reduce time-to-market by 50-70% while maintaining enterprise-grade quality. 🙂 I am currently accepting new partnerships for high-impact projects. "HIRE ME" or "INVITE ME" to your job post to discuss how we can accelerate your roadmap with AI-native engineering. Thanks & Regards, Kuldip S. 🙂

Are you looking for a reliable ASP.NET Core developer who can build, optimize, and troubleshoot real-world applications? I help businesses develop secure, scalable, and production-ready solutions using ASP.NET Core, Angular, SQL Server, and modern API integrations. With 8+ years of professional experience, I specialize in backend development, REST APIs, third-party integrations, and performance optimization. Whether you need a new application, API integration, bug fixes, or system improvements, I can help deliver reliable and maintainable solutions. 🔹 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐈 𝐏𝐫𝐨𝐯𝐢𝐝𝐞 ✔ ASP.NET Core Web API & MVC Development ✔ Angular Development & Frontend Enhancements ✔ SQL Server Design, Optimization & Performance Tuning ✔ API Integration & Troubleshooting ✔ Stripe Integration (Payments, Subscriptions, Webhooks) ✔ Third-Party Integrations (Twilio, SendGrid, Payment Gateways) ✔ Authentication & Authorization (JWT, Identity) ✔ Deployment & Production Support (IIS, Azure) 🔹 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ✔ ASP.NET Core, C#, Web API, MVC ✔ Angular, TypeScript, JavaScript ✔ SQL Server, EF Core, Dapper ✔ REST APIs & Third-Party Integrations ✔ Clean Architecture, CQRS, SOLID Principles ✔ Secure Application Design & Best Practices I focus on delivering clean, maintainable, and scalable solutions that support long-term business growth. My approach combines strong technical expertise, clear communication, and a commitment to quality. Available for ongoing development, API integrations, troubleshooting, and urgent fixes. Send me a message with your requirements, and I'll be happy to discuss the best solution for your project.