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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.

If you need to turn an idea into a working MVP, scale it into a production-ready SaaS platform, or fix a system that’s struggling to scale — I can help. I’m a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 .𝗡𝗘𝗧 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁 𝘄𝗶𝘁𝗵 𝟭𝟱+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲, 𝗮𝗻𝗱 𝗼𝘃𝗲𝗿 $𝟭𝟯𝟬𝗞+ 𝗲𝗮𝗿𝗻𝗲𝗱 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵 𝗹𝗼𝗻𝗴-𝘁𝗲𝗿𝗺 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗮𝗻𝗱 𝗰𝗼𝗻𝘀𝗶𝘀𝘁𝗲𝗻𝘁 𝟱★ 𝗳𝗲𝗲𝗱𝗯𝗮𝗰𝗸. Clients bring me in when: • Systems become complex and hard to scale • Deadlines are tight and execution needs to be reliable • They need someone who can 𝗼𝘄𝗻 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗮𝗻𝗱 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗲𝗹𝗶𝘃𝗲𝗿 • MVPs built fast with a clear path to scale • SaaS platforms with clean, multi-tenant architecture • High-performance APIs and microservices • Modernization and stabilization of existing .NET systems • Cloud-native solutions on Azure & AWS • AI-powered features integrated into real applications 𝗣𝗿𝗼𝘃𝗲𝗻 𝗧𝗿𝗮𝗰𝗸 𝗥𝗲𝗰𝗼𝗿𝗱 • 1,800+ hours on a single SaaS platform • Multiple long-term contracts (200–700+ hours) • $130K+ earned with consistent 5★ feedback • Trusted for complex systems and critical deadlines 𝗖𝗹𝗶𝗲𝗻𝘁 𝗳𝗲𝗲𝗱𝗯𝗮𝗰𝗸 "Delivers high-quality work on-time, every time" "Valuable resource for complex work under tight timelines" "Manages projects end-to-end" 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React, Next.js, Angular, Blazor 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: .NET / .NET Core, Web API, Microservices 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲: Clean Architecture, DDD, scalable systems 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀: Azure, AWS, Docker, Kubernetes, CI/CD 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: SQL Server, PostgreSQL, MongoDB 𝗔𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻: OpenAI, Anthropic, Azure AI, Gemini • Structured outputs, prompt engineering, real-world AI features • AI-assisted development (GitHub Copilot, Claude Code) 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲 • I take ownership — not just tasks • I simplify complex systems and make them scalable • I deliver reliably under tight timelines • I align engineering decisions with business goals If you're building an MVP, scaling a SaaS platform, or dealing with system complexity, I’m happy to review your approach and suggest the best path forward. 𝗟𝗲𝘁’𝘀 𝗯𝘂𝗶𝗹𝗱 𝘀𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 — 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗰𝗼𝘀𝘁𝗹𝘆 𝗿𝗲𝘄𝗼𝗿𝗸 𝗹𝗮𝘁𝗲𝗿.

Hi, I am a .Net developer having 12+ years of professional experience with a wide range of technologies and Frameworks. I am proficient with the following technology stack: ✅ .Net Framework, Asp.net Core , ✅ Xamarin Expert ✅ MAUI ✅ Angular Expert ✅ NativeScript-Angular.JS/Vue.JS ✅ Ionic/Angular ✅ Apache Cordova ✅ Capacitor ✅ Node.JS ✅ Typescript, SAAS & LESS ✅ Azure , AWS, EC2, lambda, S3, RDS, Cloud Front, Cloudformation, Rekognition, Kinesis, translate, Amplify and Elasticsearch. ✅ MySQL, Oracle, MSSQL server, PostgreSQL MongoDB, Dynamo ✅ Maven, Ant, Jenkins, Circle CI, CI/CD in Bitbucket and Gitlab ✅ Docker CLI, docker-compose, Orchestration with Kubernetes, Docker Swarm, and Amazon ECS I have recently completed an ongoing project so currently, I am open for new engagements and can be available for 40-50 hours per week.

☁ Microsoft Certified: Azure Administrator Associate 🏆 80K+ Earning 🎯100+% JSS ✨30+ Jobs Completed 🚀 3100+ Hours Hi 👋, With over a decade 🧠 immersed in MS technologies, I am a seasoned developer specializing in C#, Blazor, .NET (Core 2/3/5), .NET MVC, Angular.js, and Tailwind CSS. I have contributed in a development of 15+ corporate SaaS products and delivered successful projects, transforming their visions into reality. My expertise extends to Azure, DevOps, and CI/CD Integration, including Azure Key Vault. While I have a range of Blazor applications ready to showcase, they are client-specific and thus not publicly accessible to share. 🌟 My Featured Projects ⭐️Blazor Application for a UK-based insurance company. in blazor ⭐️Loan finance application in blazor with radzen tools ⭐️Video calling application in blazor with radzen tools ⭐️Multilevel Marketing site around the world with more than 3.5 lakh active user ⭐️Retail ERP working on 500+ shops and three warehouses. And Maintaining stock. ⭐️Transport management system currently working on 700+ branches in India. ⭐️Warehouse management system, currently working on 27 branches. ⭐️School ERP working on 12 branches. 🧠 WHY CHOOSE ME? 🍋 I don’t just meet high standards, I set them. My goal is to not only meet but extend your expectations with every project. 🍋 I am a strategic thinker, offering smart recommendations to elevate results while keeping costs in check. 🍋 From start to finish, I take full ownership of tasks and projects, ensuring transparent and consistent updates on progress. 🍋 Dependability is my trademark; you can rely on me for quick and responsive communication every time. 🎖️🎖️ My process is thorough, but tailored for each project; normally involves about 6 stages (Discovery, Strategy, Design, Development, QA/testing, Delivery). Always happy to chat or schedule a call to discuss the requirement.🤙 Looking to our successful collaboration. Thanks,

I am an Amazon API developer with 7+ years of experience building custom integrations on Amazon SP-API, Ads API, Business API, and Vendor API helping sellers, brands, and agencies automate operations, sync data, and scale without manual work. Most Amazon businesses lose hours every week to manual reporting, disconnected systems, and Seller/Vendor Central limits. I fix that by building secure, reliable API systems that do the work automatically, so you get accurate data and more time back. 🔧 Amazon SP-API Development ✔ Inventory & Order Sync ✔ FBA Reports & Shipment Automation ✔ Catalog & Listings Management ✔ Multi-Account Seller Integrations ✔ Secure OAuth/LWA Authentication 📢 Amazon Ads API Development ✔ Campaign & Performance Data Automation ✔ Custom Ads Reporting Dashboards ✔ Bid, Budget & Spend Data Pipelines ✔ Sponsored Products/Brands/Display Data Sync ✔ Cross-Account Ads Reporting 🏢 Amazon Business & Vendor API ✔ Vendor Central Integrations (POs, Invoices, Shipments) ✔ Amazon Business B2B Pricing & Catalog Sync ✔ Vendor Analytics & Chargeback Reporting ✔ EDI & Vendor Data Automation ✔ Retail Procurement & Inventory Feeds ⚙️ Core Technology Custom Backend Development | REST APIs | Webhooks | Secure OAuth/LWA | SQL & NoSQL Databases | Cloud/VPS Deployment ⭐ Why Clients Work With Me ✔ 7+ Years of Amazon API Development Experience ✔ Specialized in SP-API, Ads API, Business API & Vendor API not a generalist ✔ Clean, Secure, Well-Documented Code ✔ Clear Communication & On-Time Delivery ✔ Ongoing Support After Launch I work with Amazon sellers, brands, agencies, and software companies who need dependable, secure API systems instead of manual Seller/Vendor Central work. 📩 Let's Talk If you need someone who lives inside Amazon's APIs, SP-API, Ads API, Business API, or Vendor API message me with your project and I'll reply quickly with next steps. Amazon SP-API Developer | Amazon Ads API Developer | Amazon Vendor Central API | Amazon Business API Integration | Amazon MWS | Seller Central Automation | Vendor Central Automation | Amazon Reporting Automation | API Integration Specialist | Amazon Data Sync | Backend Developer | Marketplace API Integration

Experienced and reliable full-stack .NET developer with over 15 years of professional experience in designing, developing, and maintaining scalable web applications. I have successfully completed 65 contracts on Upwork, earned over $300,000, and logged more than 15,000 hours, delivering consistent results to clients worldwide. My technical Expertise Includes: - ASP.NET MVC, C#, .NET Framework - .NET Core (3.1, 5, 6, 7, 8 and newer) - Blazor (WebAssembly and Server) - AngularJS, Angular 2+ (including 4, 6, 7, 8), TypeScript - JavaScript, jQuery, HTML5, CSS3 - RESTful APIs, Web API 2, SOAP Integration - Selenium Web UI Automation - Telerik, Kendo UI, DevExpress, Infragistics Controls - QuickBooks API Integration and Custom Development - Third-party integrations: UPS, FedEx, DFL, and Social Media APIs Strengths: - Proven track record of long-term client relationships - Strong problem-solving skills with clean, maintainable code - Ability to quickly understand complex requirements and adapt to new technologies - Detail-oriented approach with a commitment to quality and deadlines If you're looking for a dependable .NET developer with a deep understanding of both frontend and backend technologies, I am available for new projects and long-term engagements.