20+ years experienced as Full Stack Senior .NET Developer 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, Classic ASP and JavaScript frameworks, helping businesses launch reliable digital products faster. 🚀 Backend Expertise ✅ .NET Framework, ASP.NET Core, C#, Classic ASP ✅ 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 ✅ Legacy JQuery ✅ Theme Integration 🚀 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 ✅ 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 🌟 Why Clients Choose Me ✅ Years of Real-World Software Development Experience ✅ Strong Technical Depth with Business-Focused Solution Design ✅ Clean, Maintainable, and Future-Proof Code Architecture ✅ Clear Communication, Fast Response, and Reliable Collaboration ✅ Consistent On-Time Delivery with High Quality Standards ✅ Long-Term Technical Partnership for Product Growth and Stability From solution design and development to cloud deployment and long-term maintenance, I can take full responsibility for delivering scalable, production-ready software solutions. 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 Upwork Database Architecture Specialist Upwork Performance Optimization Specialist Upwork Software Maintenance & Support Upwork Application Migration & Upgrade Services Upwork Third-Party Integration Specialist Upwork Skill Keywords ASP.NET Core .NET Framework C# .NET Core MVC Web API Classic ASP 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 Payment Gateway Integration Third-Party API Integration

✅ Top-Rated Senior Developer ✅ 100% Job Success Score ✅ Available for part-time, full-time long-term projects on Upwork (up to 40+ hours/week) ✅ Government ID Verified ✅ Professional Experience ✅ Expertise in .NET-based Web Applications, RESTful APIs, SPA architectures, CMS solutions, and enterprise-grade systems I’m a Senior Full-Stack .NET Developer with 6+ years of hands-on experience delivering and optimizing production-ready applications using C#, ASP NET / .NET Core, ABP Framework, and frontend technologies such as Angular, React, and modern JavaScript frameworks. I work across both backend and frontend, focusing on APIs, database design, performance optimization, and building responsive, user-friendly interfaces. What I Help You With - Custom web applications & system upgrades - Secure, efficient API integrations - Performance optimization & code refactoring - Long-term maintenance & scalability improvements Technical Expertise - Backend: C#, ASPNET MVC/Core, Web API, EF/EF Core, ABPio - Frontend: Angular, React, Vue, Blazor WASM, Nextjs, Tailwind, Telerik/Kendo UI - Databases: SQL Server, Azure SQL, MySQL, PostgreSQL, MongoDB - Cloud & Tools: AWS, Azure, Git, Visual Studio, CI/CD - Platforms: Windows Server, Linux, macOS Why Choose Me ✔ Clean, scalable, and maintainable code ✔ Fast delivery without sacrificing quality ✔ Client-focused communication ✔ High-performance, real-world applications ✔ Money-back guarantee & long-term discounts Availability 🕒 Part-time or Full-time (40+ hrs/week) | Ready to start immediately 💬 Response within 1 hour | Flexible time zones 👉 Click “Hire Now” or “Invite to Interview” to get started. Best regards, Le Xuan Thuan

Top Rated Plus | Full Stack .NET Developer | AI Automation Developer & AI Consultant | Azure & AWS | SaaS & E-Commerce I’m a Top Rated Plus Full Stack .NET Developer and AI Automation Developer with 10+ years of experience building scalable SaaS applications, AI-powered systems, and enterprise-grade web applications for global companies including P&G, BD, and HCL. I help businesses automate workflows, modernize legacy .NET systems, and build AI-enabled products using .NET / C# / ASP.NET / Azure / AWS / React / AI integrations. With 120+ successful projects, I’m typically brought in when performance, scalability, or automation really matters. ✔ Full Stack .NET Development: .NET / .NET Core / C# / ASP.NET / SQL Server / REST APIs / Microservices ✔ AI Automation & AI Integration: OpenAI / ChatGPT APIs / Workflow Automation / Intelligent Systems ✔ Cloud Development: Azure / AWS / Docker / CI/CD / Cloud Optimization ✔ SaaS Application Development: Scalable architecture / Multi-tenant systems / Secure APIs ✔ React / Angular / TypeScript / JavaScript ✔ Responsive UI / Performance Optimization / UX Improvements ✔ Shopify / WooCommerce / Custom E-Commerce Platforms ✔ Payment Gateways / ERP & CRM Integrations / Conversion Optimization I help companies move from “We want AI” to “This is the right AI solution for our business.” 🔹 AI opportunity identification & automation strategy 🔹 Technical feasibility & ROI analysis 🔹 Tool, model & architecture selection 🔹 MVPs, PoCs & production AI deployments 🔹 Scalable AI implementation roadmaps Once the strategy is clear, I build custom software and production-ready, scalable systems: ✅ Custom .NET web applications ✅ AI-powered features & integrations ✅ Automation pipelines that reduce manual work ✅ Secure APIs & third-party integrations ✅ Cloud-native systems built for scale Every solution is designed with performance, maintainability, and long-term growth in mind. Full Stack Developer, .NET Developer, ASP.NET Developer, C# Developer, Azure Developer, AWS Developer, AI Automation Developer, AI Consultant, SaaS Developer, Custom Software Development, API Integration, Microservices Architecture, Cloud Engineer, Shopify Developer, WooCommerce Developer, React Developer, Angular Developer, DevOps Engineer, CI/CD, Secure Web Applications, Enterprise Software Development

I am professional developer having experience of more than 8+ years. I have 100% Job Success Rate. I have over 8+ years of experience in software development. I have good experience working with .NET 10, ASP.NET Core, MVC and C#. Apart from this, I am also expert in Blazor, MAUI, Angular and REACT. I have successfully developed and delivered a wide range of web applications. Technical proficiency: - .NET, C#, ASP.NET Core, MVC, WebForm, WinForm, Blazor, WebAPI, ASP.NET Identity, React, Angular - Rest API, gRPC, Docker, Microservices - SQL Server, MySQL, PostgreSQL, MongoDB, SQLite, Entity Framework Core, and Dapper - ASP.NET boilerplate, Onion, Repository, Unit of Work Architecture, Microservice, and OOPs - JavaScript, JQuery, CSS, and Bootstrap 3/4 - Telerik, Devexpress, and SyncFusion - Azure, AWS, Digital Ocean, GoDaddy, and WebHosting 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' - nopCommerce - PowerBI 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 - Cloudflare I guarantee quality work, and I aim to maintain long-term connections. Additionally, I stay updated on new technologies and tools to provide top-notch services. I always do my best to provide the best service for a long-term business relationship with my customers.

🏆 Top Rated 👍 100% Job Success 😄 Long List of Happy Clients ⏳ Fast Turnaround 📞 Excellent Communication Full Stack .Net Developer with 15+ years experience in the Healthcare domain with a special interest in HIPPA and Interoperability. I have expert knowledge of information messaging standards (I.e. HL7/FHIR/X12 and middle-ware principles and concepts (i.e. APIs, REST, WSDL, SOAP, Web Services, etc.) AI Chatbots for healthcare (patient support, triage) LLM integrations (GPT, Claude) Medical data summarisation (reports, notes) AI-powered EMR automation Voice → text medical transcription (AI) AI agents for clinics (appointments, follow-ups) My Expertise • Web & Mobile Solution • Telehealth/Telemedicine Virtual Appointment Booking Solutions & mHealth Apps • EMR, EHR, PHI, Medical Billing Solutions for Patient Healthcare/Medical Records • HealthKit Integration for Fitness Apps • Healthcare device and smartwatch integration for vitals extraction • Healthcare Marketplace Management Solutions • Doctor-patient apps and Websites • Medical Job Portals • Staff Management Software, and more! • Chat-bot, video call, SMS, email service integration  Healthcare Consulting & Subject Matter Expertise: • HIPAA Compliance & Standards • HL7 V2, HL7 FHIR, SMART on FHIR, and NCPDP Standards • EHR & EMR Integration (EPIC, Cerner) • Healthcare Device & HealthKit Integration • Consulting on Telemedicine, EMR/EHR, HL7, FHIR, EDI, HIE, CCDA, HIPAA, Mirth Connect, Billing, Benefit Plan Management, Eligibility Verification, Claim Scrubbing • Start-Up and Large Organization Consulting for HIPAA Compliance • Security Risk Assessment and Remediation for Healthcare Applications • Mirth Connect Configuration and Channel Customization • Mirth Connect-Based FHIR Integration • Lab Integrations (Uni-Directional, Bi-Directional) • Integration with PopHealth, Epic, Cerner • Billing Management and EDI Processing Systems • DICOM Viewer & PACS Solutions Technologies: .Net Framework, .Net Core, C#, ASP.Net MVC/WebAPI2/WebForms, React, Redux, Node Js, REACT, Angular,, WinForms, WPF, WinRT/WinJS, Windows Phone/Xamarin, Entities Framework/ADO.NET, MS SQL Server, Cloud Server like AWS, Azure & GC HIPAA Security Expert doing security assessment, identifying PHI, looking for HIPAA compliance, complying HITRUST requirements, Involved in auditing, reviewing BAA with HIPAA hosting provider. I have also updated with emerging technologies like AI, chatbot integration, and process automation. Our Global Impact: I've proven my healthcare domain expertise across the US, Canada, Australia, Europe, South America, and the UAE healthcare industries. Let's connect and transform your vision into a reality! Add value to your dream product with our expertise. Contact us today!

🎯 100% Refund If I set the wrong expectations and can’t deliver. No questions asked. My name is Jitesh Narang I am a senior AI full stack .net developer with 8 years of hands of experience developing AI-Powered web and desktop apps using different technologies. I am expert in:- 1. Legacy .NET Modernization 2. .NET + Azure 3. .NET + Healthcare / Insurance / Banking Domain

I bring over 17 years of extensive experience in software development, specializing in the .NET Framework and .NET Core ecosystems. My expertise includes: ✓ Web Development: Proficient in ASP.NET Core MVC, ASP.NET Core Web API, ASP.NET MVC, ASP.NET Web Forms, and Windows Forms. ✓ Programming Languages: Expertise in C# and VB.NET with a strong command of modern software development practices. ✓ Database Management: 16+ years of experience with Microsoft SQL Server, encompassing SQL, T-SQL, ADO.NET, LINQ, Entity Framework, Entity Framework Core, and Dapper. ✓ Front-End Technologies: Strong skills in JavaScript, React, jQuery, HTML, CSS, and Bootstrap. ✓ FileMaker Expertise: 14+ years of experience with FileMaker Pro, FileMaker Server, and Claris FileMaker Cloud. ✓ Additional Skills: Proficiency in PHP/MySQL, MongoDB, data scraping, and integrating third-party APIs such as Stripe, PartnerStack, and tour/activity platforms. I am also experienced in implementing biometric device integrations. Why Hire Me? I am a results-driven professional dedicated to delivering exceptional solutions. My ability to transform ideas into reality, coupled with a strong commitment to deadlines and high-quality outcomes, ensures client satisfaction and successful project delivery. With a proven track record of tackling complex challenges and exceeding expectations, I am a reliable partner for achieving your goals.

🏆 Top Rated ✔ Full-Stack Developer ✔ Excellent communication 🏆 ⭐[ Well versed with following Technologies ]: ✔ .NET (10, 8, 7, 6) Framework| .NET MVC |.NET Core | Entity Framework | Azure | SQL | Blazor | MAUI | Dapper | Microservices | APi Integration, GraphQL | RestAPI | Javascript | Jquery | Angular | Vue | React | HTML | CSS ✔ I am a Full-stack developer and experienced with frontend & backend both. Solid hands-on Web Application Development, Software Development, Website Development, API Integration, etc. I have worked in all phases of project development such as Business requirement Analysis, Architecture Design, Database Design, Development, Testing, Debugging, Optimization, Deployment, Maintenance ✔ [ I have worked on many domains. A few major domains are listed below]: - Event Management - Flight Scheduling - Supply Chain Management - Health Care - Fintech - Point of Sale - eCommerce Solutions - CRM - Compliance Management - Inventory Management - Marketplace - B2B and B2C trading platform - Mobile Marketing - Dashboard/ Reporting & Analysis - Business Application - Workflow Application

I help startups, SaaS companies, and businesses build scalable web, mobile, and enterprise applications using modern Microsoft technologies, cloud infrastructure, and AI-integrated solutions. With 16+ years of experience in full-stack development and software architecture, I specialize in building high-performance SaaS platforms, enterprise systems, startup MVPs, business applications, and cloud-based solutions using .NET Core, C#, MAUI, Blazor, Azure, Angular, and React.js. My expertise includes: • Full-stack web application development • SaaS platforms & startup MVP development • Enterprise software & business systems • AI integrations, AI agents & workflow automation • Cross-platform mobile app development • API development & third-party integrations • Cloud-based architecture & Azure solutions • Admin dashboards & scalable backend systems • Application modernization & long-term maintenance Microsoft & Full Stack Expertise: • ASP.NET Core & ASP.NET MVC • C#, .NET Core & Entity Framework • .NET MAUI & Xamarin development • Blazor applications & component-based UI • Azure cloud services & deployment • Angular & React.js frontend development • REST APIs & microservices architecture • SQL Server, MySQL & cloud databases Mobile & Cross-Platform Development: • .NET MAUI mobile applications • Xamarin app development • iOS & Android cross-platform solutions • Responsive UI & performance optimization • Native integrations & device features AI & Automation Experience: • OpenAI / ChatGPT integrations • Claude AI integrations • AI agents & intelligent assistants • AI-powered business applications • Workflow automation systems • OCR & intelligent document processing • AI-integrated SaaS platforms • AI-powered mobile & web experiences Cloud, DevOps & Architecture: • Microsoft Azure cloud infrastructure • CI/CD pipelines & deployment workflows • Scalable architecture & system optimization • API integrations & cloud services • Agile development & project delivery I have worked on SaaS products, enterprise applications, healthcare systems, eCommerce platforms, fintech solutions, CRM/ERP systems, startup MVPs, and custom business applications across multiple industries. ✔ $80K+ earnings on Upwork ✔ 32 successfully completed projects ✔ 1,480+ hours worked ✔ 16+ years of industry experience ✔ Top Rated Plus profile I focus on building scalable, maintainable, and business-focused applications with clean architecture, strong performance, and modern user experiences. Whether you need a SaaS platform, enterprise application, startup MVP, AI-integrated solution, cloud-based system, or cross-platform mobile app using .NET technologies, I can help transform your idea into a reliable and scalable product. Let’s discuss your project.

Modern .NET applications need more than just code - they need structure, scalability, and long-term reliability. Bringing 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 of experience working with 𝐂#, 𝐀𝐒𝐏.𝐍𝐄𝐓 𝐂𝐨𝐫𝐞, 𝐚𝐧𝐝 𝐦𝐨𝐝𝐞𝐫𝐧 .𝐍𝐄𝐓 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 I develop scalable systems across enterprise applications, CMS platforms, and eCommerce solutions. My focus is on creating structured, maintainable codebases that support long-term growth rather than short-term fixes. I have hands-on experience with CMS platforms including 𝐃𝐍𝐍 (𝐃𝐨𝐭𝐍𝐞𝐭𝐍𝐮𝐤𝐞), 𝐔𝐦𝐛𝐫𝐚𝐜𝐨, 𝐒𝐢𝐭𝐞𝐟𝐢𝐧𝐢𝐭𝐲, 𝐚𝐧𝐝 𝐎𝐫𝐜𝐡𝐚𝐫𝐝, where I handle custom development, module creation, integrations, and performance improvements. On the eCommerce side, I work extensively with 𝐍𝐨𝐩𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 - customizing workflows, improving performance, and building tailored features based on business needs. 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊: ⦁ 𝐁𝐀𝐂𝐊𝐄𝐍𝐃- C#, ASP.NET Core, .NET Core, .NET 8, ASP.NET MVC, Web API, Entity Framework, LINQ, Microservices Architecture, SignalR, gRPC, Clean Architecture, Domain-Driven Design (DDD), CQRS ⦁ 𝐂𝐌𝐒 & 𝐄𝐂𝐎𝐌𝐌𝐄𝐑𝐂𝐄 - DNN (DotNetNuke), Umbraco CMS, Sitefinity CMS, Orchard CMS, NopCommerce, Custom CMS Development, Headless CMS, CMS Migration & Optimization ⦁ 𝐃𝐀𝐓𝐀𝐁𝐀𝐒𝐄- SQL Server, PostgreSQL, MySQL, MongoDB, Redis, CosmosDB, Database Design, Query Optimization, Indexing, Stored Procedures ⦁ 𝐂𝐋𝐎𝐔𝐃 & 𝐃𝐄𝐕𝐎𝐏𝐒 - Microsoft Azure, Azure App Services, Azure Functions, Azure DevOps, AWS (EC2, S3, Lambda, RDS), Docker, Kubernetes, CI/CD Pipelines, GitHub Actions, Infrastructure as Code (IaC), Linux ⦁ 𝐀𝐑𝐂𝐇𝐈𝐓𝐄𝐂𝐓𝐔𝐑𝐄 & 𝐒𝐘𝐒𝐓𝐄𝐌 𝐃𝐄𝐒𝐈𝐆𝐍 - RESTful APIs, GraphQL, Distributed Systems, Event-Driven Architecture, Scalable System Design, High Availability Systems ⦁ 𝐈𝐍𝐓𝐄𝐆𝐑𝐀𝐓𝐈𝐎𝐍𝐒 - Stripe, Twilio, SendGrid, Salesforce, DocuSign, Google APIs, Payment Gateways, SOAP APIs, REST APIs, Webhooks, Third-Party API Integrations ⦁ 𝐓𝐄𝐒𝐓𝐈𝐍𝐆 & 𝐐𝐔𝐀𝐋𝐈𝐓𝐘 - Unit Testing, Integration Testing, xUnit, NUnit, Test Automation, Debugging, Performance Profiling ⦁ 𝐀𝐈 & 𝐀𝐔𝐓𝐎𝐌𝐀𝐓𝐈𝐎𝐍 - Python, FastAPI, OpenAI API, Automation Workflows, Data Processing 𝐖𝐇𝐀𝐓 𝐈 𝐃𝐄𝐋𝐈𝐕𝐄𝐑 ⦁ Full-stack .NET application development ⦁ CMS development and customization (DNN, Umbraco, Sitefinity, Orchard) ⦁ eCommerce solutions using NopCommerce ⦁ Scalable APIs and backend systems ⦁ Legacy system modernization to ASP.NET Core ⦁ Performance optimization and database tuning ⦁ Cloud-ready deployments and architecture ⦁ Debugging, stabilization, and ongoing improvements 𝐃𝐎𝐌𝐀𝐈𝐍𝐒 & 𝐈𝐍𝐃𝐔𝐒𝐓𝐑𝐈𝐄𝐒 ⦁ Finance & FinTech ⦁ eCommerce & Retail ⦁ Healthcare & HealthTech ⦁ Education & eLearning ⦁ SaaS Platforms ⦁ Real Estate ⦁ Logistics & Supply Chain ⦁ Enterprise Business Applications ⦁ CRM & ERP Systems I focus on delivering solutions that are clean, efficient, and built to scale - so your system continues to perform as your business evolves. 𝐈𝐟 𝐲𝐨𝐮'𝐫𝐞 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐚 .𝐍𝐄𝐓 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐰𝐡𝐨 𝐮𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝𝐬 𝐛𝐨𝐭𝐡 𝐂𝐌𝐒 𝐞𝐜𝐨𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐚𝐧𝐝 𝐜𝐮𝐬𝐭𝐨𝐦 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭, 𝐈’𝐦 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐭𝐨 𝐜𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐞.