⭐ Top Rated Plus | $400K+ Earned | 23,000+ Hours | 100% Job Success I help businesses modernize and scale .NET applications — turning slow, hard-to-maintain legacy systems into fast, secure, scalable platforms, without a risky full rewrite. From ASP.NET Web Forms migrations to enterprise systems running 300GB+ databases, I specialize in the complex, business-critical work most developers avoid. Increasingly, clients bring me in for a second reason: they want AI capabilities — document intelligence, smart search, workflow automation — and their legacy system can't support them. I fix the foundation and build the AI on top. Over 14 years, I've delivered 89+ projects on Upwork with consistent 5-star results, including a 1,300+ hour engagement with a single client who kept coming back. What I bring to your project: 🔹 Legacy .NET Modernization — Migrating ASP.NET Web Forms & .NET Framework apps to ASP.NET Core / .NET 8, incrementally and without breaking what already works 🔹 SQL Server Performance Specialist — Complex queries, stored procedures, query optimization, and scaling databases to 300GB+ 🔹 AI Integration on Legacy Systems — Production OpenAI/LLM features: document intelligence, RAG search over your business data, OCR pipelines. Built on a modernized foundation, not bolted onto a fragile one 🔹 Full-Stack .NET Depth — ASP.NET (Web Forms, MVC, Core), C#, Web API/REST, Entity Framework, LINQ 🔹 Modern Front-End — React, Angular, Vue.js, Blazor, TypeScript, Tailwind, Bootstrap 🔹 Cloud & DevOps — Azure (primary), plus AWS & GCP experience, Azure DevOps, CI/CD pipelines, Git 🔹 Integrations — Payment systems (Stripe subscription billing for a healthcare platform), third-party APIs, MongoDB, CosmosDB Why clients rehire me: ✅ Clear, proactive communication (0–4 hour response time) ✅ Reliable availability in US time zones — I regularly work Eastern and Pacific hours ✅ Clean, maintainable, well-tested code ✅ Enterprise-standard code reviews, team leadership, and developer mentoring ✅ Solving hard problems — not just "making it work" Not sure where to start? I offer a fixed-fee, two-week Legacy Health Audit: your slowest queries analyzed, a risk map of your codebase, a phased modernization roadmap, and an AI-readiness assessment — so you know exactly what's wrong and what it will cost to fix, before you commit to anything. Whether you need a legacy system modernized, a SQL Server database that's buckling under load, AI features your current stack can't deliver, or a senior engineer to unblock your team — let's talk. Describe your application and I'll tell you specifically how I'd approach it. I'll respond within 4 hours.

I help businesses build scalable, secure and high-performance .NET applications using ASP.NET Core, MVC, Web API and Azure. With 17+ years of experience in software development, I specialize in designing and delivering enterprise-grade web and backend solutions using Microsoft technologies. I’ve worked across multiple .NET frameworks, helping clients build new platforms, modernize legacy systems and integrate complex APIs with confidence. 🔹 Core Backend Expertise ASP.NET Core / ASP.NET MVC / .NET Core ASP.NET Web API & RESTful Services C#, .NET Framework, Microservices Architecture SQL Server, MySQL, Database Design & Optimization Azure Cloud, Deployment & Application Hosting 🔹 Frontend & Full-Stack Capabilities React.js, Next.js, jQuery ASP.NET Ajax Cross-platform mobile apps using FlutterFlow Node.js & Supabase for modern backend services 🔹 What I Help Clients With Building new web applications from scratch Modernizing legacy ASP.NET applications Developing secure REST APIs & integrations Improving performance and database efficiency Long-term maintenance & scalable architecture I focus on clean architecture, maintainable code and clear communication, so projects stay predictable and easy to scale. If you’re looking for a reliable senior .NET developer who can take ownership and deliver quality results, let’s connect.

I’m a seasoned freelance developer with over 12 years of hands-on experience building scalable, secure, and high-performance applications using ASP.NET (Web Forms to Core), Blazor, C#, and Microsoft Azure. I’ve successfully completed 7+ projects on Upwork and earned a Top Rated badge through consistent delivery, communication, and quality. 🚀 My Core Specializations ASP.NET Core / MVC / Web Forms RESTful & SOAP API Development and Integration Full Stack Web Development (Back-End Focused) Microsoft Azure (Blob Storage, Tables, Functions, Web Jobs, Services) SQL Server / MySQL / Entity Framework / Dapper Blazor, React, AngularJS, JavaScript, jQuery eCommerce Solutions, ERP Integrations (SAP, 3rd Party APIs) 🛠 Tech Stack & Skills ✔ C#, .NET Framework, ASP.NET Core, ASP.NET MVC, ADO.NET, Web API ✔ Entity Framework (EF Core), Dapper, LINQ, SQL Server, MySQL ✔ JavaScript, jQuery, Bootstrap, Telerik Kendo UI ✔ React.js, AngularJS – Frontend SPAs ✔ Azure DevOps, Blob Storage, Azure Tables, Web Jobs, Azure Functions ✔ SOAP/REST APIs, Google/Amazon/PayPal APIs, 3rd Party ERP Systems 💡 What I Bring to the Table End-to-end development: From documentation, design, development, to deployment Strong debugging, optimization, and legacy code handling skills Reliable long-term support and communication Quick onboarding — I can take over mid-project or start from scratch Experience working with both startups and enterprise-level systems Let’s connect to discuss how I can bring your vision to life or take your existing product to the next level. 📩 Message me today — I’m always open to new and exciting opportunities!

Are you looking for a Senior Full Stack Developer who can build AI-powered web applications, enterprise .NET systems, and production-grade APIs and deliver on time, every time? I am Muhammad Qalb Abbas, a Top Rated Full Stack Developer with 7+ years of hands-on experience in ASP.NET Core, C#, React, and Angular, now specialising in AI integration using OpenAI API and Claude API. With a 100% Job Success Score across 20+ completed projects, I bring both deep technical expertise and the reliability clients come back for. ✅ Full Stack Developer — ASP.NET Core · React · Angular · C# ✅ AI Integration Specialist — OpenAI API · Claude API · Semantic Kernel · RAG Pipelines ✅ 7+ Years in ASP.NET MVC / ASP.NET Core · 3+ Years in React JS ✅ Expert Backend Engineer — REST APIs · Entity Framework · MS SQL · PostgreSQL ✅ API Development & Third-Party Integration Specialist ✅ Bug Fixing · Performance Optimisation · Legacy .NET Modernisation ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🤖 AI-POWERED APPLICATION DEVELOPMENT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ I help businesses embed real, working AI into their existing systems — not demos, but production features that ship. Using OpenAI API (GPT-4o), Claude API (Anthropic), and Microsoft Semantic Kernel, I build: → AI chatbots & assistants integrated into ASP.NET Core web apps → Document Q&A systems using RAG (retrieval-augmented generation) pipelines → AI-powered workflow automation and intelligent search → Vector database integrations (pgvector, Pinecone) → Azure OpenAI Service deployments with proper auth, rate limiting & cost controls ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚙️ FULL STACK WEB DEVELOPMENT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ My core expertise in ASP.NET Core and C# development covers the full stack — from clean backend architecture to polished frontend UIs: → ASP.NET Core · ASP.NET MVC5 · ASP.NET Web API · .NET Core (3.1 / 5 / 6 / 7 / 8) → C# · ADO.NET · LINQ · Dapper ORM · Entity Framework · Repository Pattern · Dependency Injection → React JS · Angular · Blazor · JavaScript · TypeScript · jQuery · Bootstrap → MS SQL Server · PostgreSQL · Database design & query optimisation → Web Scraping · Admin Panel Development · SaaS product development ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔗 API & INTEGRATION EXPERTISE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ → RESTful API development & documentation → Third-party API integrations (payment gateways, CRMs, e-commerce platforms, Etsy, SignalR) → OpenAPI / Swagger · Secure token-based authentication (JWT, OAuth) → Real-time features with SignalR ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ☁️ CLOUD & DEVOPS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ → Microsoft Azure · Azure OpenAI Service · Azure App Service → GitHub · CI/CD pipelines · Seq logging · Cloud deployment ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 💡 WHY CLIENTS CHOOSE ME ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ "He was always available whenever we had issues. He followed our business requirements perfectly." — Kevin, 5-star review, 5-month engagement ✔ 100% Job Success Score · Top Rated on Upwork ✔ 0–4 hour average response time ✔ Clean, commented code with full project documentation ✔ I flag problems early — no surprises at the deadline ✔ Trained developers in ASP.NET Core and Angular — I explain clearly, not just deliver code ✔ 24/7 availability for urgent fixes and time-sensitive projects ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📌 WHAT I CAN BUILD FOR YOU ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✦ AI-integrated web applications (OpenAI · Claude · Semantic Kernel) ✦ Custom ASP.NET Core / MVC web applications from scratch ✦ React JS and Angular single-page applications (SPAs) ✦ REST API development and third-party API integrations ✦ SaaS platforms — sales, finance, CRM, ERP systems ✦ Admin dashboards and data management panels ✦ Bug fixing, performance tuning and legacy .NET modernisation ✦ Real-time features with SignalR · Web scraping & data extraction If you need a reliable Full Stack Developer who delivers AI-powered .NET solutions on time and to specs I'd love to work with you. 📩 Send me a message or invite me to your job. I respond within 4 hours. Best regards, Muhammad Qalb Abbas Senior Full Stack Developer | AI Integration Specialist

𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 | $𝟯𝟬𝟬𝗞+ 𝗘𝗮𝗿𝗻𝗲𝗱 | 𝟭𝟯,𝟬𝟬𝟬+ 𝗛𝗼𝘂𝗿𝘀 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 I’m a Senior .NET Full-Stack Engineer with 9+ years of experience building SaaS platforms, enterprise web applications, healthcare systems, ERP tools, internal portals, APIs, and cloud-based products. Most of my work is around ASP.NET Core, .NET Framework, C#, React, Angular, TypeScript, SQL Server, Azure, AWS, REST APIs, microservices, and long-term product development. I also work comfortably with AI-assisted development workflows, code review tools, and AI/API integrations where they help improve speed, product features, or internal operations. Clients usually hire me when they need someone who can step into a real product, understand the codebase, and start moving things forward. That can mean building new features, fixing bugs, improving performance, modernizing legacy code, integrating APIs, or taking over development when the previous developer is no longer available. 𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂 𝘄𝗶𝘁𝗵: SaaS and enterprise web application development • ASP.NET Core, ASP.NET MVC, .NET Framework, and C# • React, Angular, JavaScript, and TypeScript • REST APIs, webhooks, and third-party integrations • SQL Server database design, queries, and optimization • Azure, AWS, and cloud deployment • Azure DevOps, CI/CD pipelines, and release support • Microservices and backend architecture • Legacy .NET modernization and codebase takeover • Bug fixing, refactoring, and performance improvements • Healthcare, ERP, internal business tools, and workflow systems • Unit testing, Cypress testing, and production support • AI/API integrations where they add practical value to the product 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: .NET / ASP.NET Core / Web API React / Angular / TypeScript SQL Server / MongoDB / MySQL Azure / AWS / GCP REST APIs / Microservices I focus on clean architecture, scalable systems, and reliable delivery so your product is built the right way. 𝗞𝗲𝘆 𝗔𝗰𝗵𝗶𝗲𝘃𝗲𝗺𝗲𝗻𝘁𝘀: •⁠ ⁠Delivered 𝟮𝟬+ 𝗲𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 web applications using ASP.NET Core, React, and Angular •⁠ ⁠Optimized .𝗡𝗘𝗧 𝗔𝗣𝗜𝘀 and 𝗦𝗤𝗟 𝗦𝗲𝗿𝘃𝗲𝗿 𝗾𝘂𝗲𝗿𝗶𝗲𝘀, reducing response times by 𝟲𝟬% •⁠ ⁠Built high-performance backend systems handling 𝟭𝗠+ 𝗺𝗼𝗻𝘁𝗵𝗹𝘆 𝗔𝗣𝗜 𝗿𝗲𝗾𝘂𝗲𝘀𝘁𝘀 •⁠ ⁠Designed 𝗰𝗹𝗼𝘂𝗱-𝗯𝗮𝘀𝗲𝗱 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲𝘀 𝗼𝗻 𝗔𝘇𝘂𝗿𝗲 𝗮𝗻𝗱 𝗔𝗪𝗦 𝘀𝘂𝗽𝗽𝗼𝗿𝘁𝗶𝗻𝗴 𝟭𝟬𝗸+ 𝗮𝗰𝘁𝗶𝘃𝗲 𝘂𝘀𝗲𝗿𝘀 •⁠ ⁠Completed 𝟭𝟯,𝟬𝟬𝟬+ 𝗵𝗼𝘂𝗿𝘀 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 across long-term enterprise contracts My focus is simple: clean code, stable systems, clear communication, and software that keeps working after launch. If you need a senior developer to build, fix, improve, modernize, or take over a .NET/React/Angular application, I can help.

🌟I’m a Full Stack Developer, .NET developer, .NET Core developer, ASP.NET developer, ASP.NET Core developer, C# developer, and C# .NET developer with 8+ years of experience in full stack development, .NET full stack engineering, backend development, frontend development, and custom software development. I build reliable web applications, enterprise systems, SaaS platforms, APIs, and business software that are designed to scale, perform, and stay maintainable over time. My focus is not only on writing code, but on building systems that are stable, clean, and ready for real-world use. As a Full Stack developer and .NET developer, I work across .NET, .NET Core, ASP.NET, ASP.NET MVC, ASP.NET Core, and C# to build production-ready systems with solid backend architecture and modern frontend interfaces. I regularly handle ASP.NET developer work, ASP.NET Core developer projects, ASP.NET MVC applications, .NET Core developer tasks, and C# developer builds where stability, structure, and clean code matter from day one. That includes everything from application design and business logic to integration, testing, and deployment support. A big part of my work as a full stack developer react and React developer involves connecting frontend and backend layers into one smooth product. I build React frontends, support Angular applications, and deliver Angular C# solutions where UI and backend logic need to stay tightly aligned. When clients need a full-stack developer who can own both sides of the application, I step in as the full stack developer who can manage the frontend, backend, and APIs together without splitting the job across multiple people. I also work on C# WPF desktop applications, .NET Core backend systems, API integration, third-party services, authentication, permissions, database design, and application modernization. My experience includes full stack development for SaaS platforms, internal tools, customer portals, enterprise dashboards, and workflow-heavy business systems. Whether the project is a new MVP, a platform rebuild, or a legacy upgrade, I focus on clean architecture, maintainability, and long-term support. I’m especially comfortable with projects that need both speed and depth. Some clients need a .NET developer to fix a specific issue or add a feature. Others need a full stack developer who can take ownership of the entire product layer, including backend services, frontend implementation, and API-driven workflows. In both cases, I bring a practical approach that keeps the codebase manageable and the delivery consistent. 💡 What I specialize in - Full stack development for web applications, SaaS platforms, portals, and business systems. - Full stack developer and full-stack developer work across frontend and backend layers. - .NET developer and .NET Core developer work for scalable backend systems. - ASP.NET developer, ASP.NET Core developer, ASP.NET MVC, and ASP.NET Core application development. - C# developer work using C#, C# .NET, and .NET backend architecture. - Full stack developer react work with React frontends and .NET backends. - React development for modern responsive user interfaces. - Angular development for structured frontend applications. - Angular C# applications with clean frontend-backend integration. - C# WPF desktop applications for internal tools and enterprise workflows. - .NET full stack engineering for data-driven systems and business logic. - API integration, external services, and data flow automation. - MVP development, feature expansion, and product scaling. - Legacy modernization, refactoring, and performance optimization. In my day-to-day work as a Full Stack Developer, I design systems that support real business goals, not just polished screens. That means secure authentication, permissions, APIs, background jobs, database structure, and application logic that can handle growth. As a .NET full stack engineer, I also focus on clean code, maintainability, and practical architecture so teams can keep moving without creating unnecessary technical debt. I care about how software behaves after launch, not just how it looks during development. My core stack includes .NET, .NET Core, ASP.NET, ASP.NET MVC, ASP.NET Core, C#, C# .NET, React, Angular, SQL databases, REST APIs, and modern deployment practices. I’m comfortable working as a full stack developer, .NET developer, ASP.NET developer, ASP.NET Core developer, C# developer, or full-stack developer on both greenfield products and existing systems that need improvement. I can also step into legacy codebases, clean up technical debt, and rebuild critical parts without disrupting the rest of the product. 🌟 Clients usually choose me when they need a full-stack developer who can move fast, stay organized, and build software that holds up over time. If you need a .NET developer .NET Core developer, ASP.NET Core developer, C# developer, React developer, or Angular developer, let’s talk about your project. Message me!

Senior .NET Full-Stack Developer with 8+ years of experience building SaaS platforms, ERP systems, REST APIs, AI-powered applications, and enterprise software used by thousands of users. I help businesses launch scalable, secure, and cloud-ready solutions using ASP.NET Core, C#, Azure, React, Angular, and modern AI technologies. My expertise spans ASP.NET Core, .NET 8/9, C#, microservices, cloud infrastructure, enterprise integrations, and modern frontend frameworks including React, Angular, Blazor, and Next.js. I have successfully delivered scalable applications ranging from fintech and logistics platforms to healthcare, eCommerce, AI-powered SaaS products, and enterprise workflow systems. In addition to backend and frontend engineering, I have strong experience integrating AI-powered solutions into enterprise applications, including intelligent chatbots, recommendation engines, predictive analytics, workflow automation, computer vision, and AI-assisted decision systems. I have worked with AI integrations, automation frameworks, and cloud AI services to improve operational efficiency and user engagement. Languages C#, ASP.NET Core, .NET Framework, .NET 8/9, TypeScript, JavaScript (ES6+), SQL, T-SQL, Python, HTML5, CSS3, Dart, JSON Frontend Technologies React.js, Next.js, Angular, Blazor, Razor Pages, MVC, Bootstrap, Tailwind CSS, Material UI, Shadcn/UI, jQuery Backend & Frameworks ASP.NET Core MVC, ASP.NET Web API, Entity Framework Core, LINQ, SignalR, MediatR, Dapper, Minimal APIs, gRPC, MassTransit, RabbitMQ, Hangfire, Quartz.NET, Node.js, Express.js, NestJS Cloud, DevOps & Infrastructure Microsoft Azure, Azure DevOps, AWS Services, Docker, Kubernetes, GitHub Actions, Firebase, Cloud Functions, IIS, Nginx, CDN & Security Platforms Databases & Storage Microsoft SQL Server, PostgreSQL, MySQL, MongoDB, Redis, DynamoDB, SQLite, Firebase Firestore, Elasticsearch, Cloud Storage Solutions Integrations & APIs Payment Gateways, Logistics APIs, Shipping Integrations, GPS & Fleet Tracking Systems, ERP/CRM Integrations, Marketplace APIs, Communication Platforms, AI Services, Authentication Providers, Real-time Notification Systems Tools & Platforms Visual Studio, VS Code, Git, GitHub, Bitbucket, Jira, Postman, Swagger/OpenAPI, Docker Desktop, Azure Portal, Firebase Console Architecture & Methodologies Microservices Architecture, Clean Architecture, Domain-Driven Design (DDD), CQRS, Event-Driven Architecture, SOLID Principles, MVC, MVVM, Agile, Scrum, Kanban Core Expertise • Enterprise SaaS Platforms • Fintech & Payment Applications • Logistics & Transportation Management Systems • Fleet Management & Real-time Tracking • eCommerce & Marketplace Solutions • Healthcare & Telemedicine Platforms • AI-Powered Applications • CRM / ERP Systems • Booking & On-demand Platforms • IoT & Device Integrations • Warehouse & Inventory Management • Multi-tenant Applications • Secure API Development • Cloud-native Applications • Real-time Applications & Notifications AI development: • OpenAI API • GPT-4o • RAG • Vector Databases • AI Agents • LangChain • MCP • Cursor AI • Workflow Automation • AI Chatbots

I am a full-stack web developer with 18+ years of software development experience. My focus technologies are ASP.Net (MVC, Web API, Razor Pages, Web forms) C#, VB.Net JavaScript, jQuery, HTML, CSS, Bootstrap CSS, Tailwind CSS, Material UI ReactJS, Signalr, Net MAUI, ML.Net Blazor Server Entity Framework and SQL Server. I have extensive experience of developing web applications for many industry verticals. I am a full stack developer capable of developing Web applications and Mobile applications (using React Native and .Net Maui). During my professional career I have been responsible for development software from scratch, upgrading legacy applications to latest tech stack, maintaining and enhancing existing applications developed by other developers. I provide simple and manageable solution for a complex business problem. I communicate regularly regarding the project progress and I focus on understanding the requirements clearly to avoid any confusion while developing features. Please do check my upwork on work history and portfolio as well.

**🚀 Elite .NET Developer | 8+ Years Building Scalable Solutions | Top-Rated with 100% Success Rate** **ASP.NET CORE | WEB API | C# | MICROSERVICES | DOCKER | BLAZOR | MAUI | SQL SERVER | AZURE | ANGULAR** Looking for someone who doesn’t just code, but thinks through problems and delivers solutions that actually work? You’ve found the right developer. 📊 Track Record That Speaks: 🏅 TOP-RATED PLUS 🏆 100% Job Success Rate ⭐ 5-Star Client Reviews 💰 $100k+ Platform Earnings 🔥 40+ Successful Projects ⚡ 4k+ Upwork Hours 🎯 Zero Failed Deliveries 🛠️ Core Tech Stack: Backend: .NET 9, ASP.NET Core 8, C#, Web API, Microservices Frontend: Blazor (Server/WASM), Angular 17, JavaScript/TypeScript, Html5, CSS3, Jquery Database: SQL Server, PostgreSQL, MongoDB, Azure Cosmos DB,Firebase Cloud: Azure, AWS, Docker, Kubernetes Payments: Stripe, PayPal, Square, Authorize.Net, Braintree APIs: REST, GraphQL, SOAP, OAuth 2.0, JWT Tools: Visual Studio 2022, Git, Azure DevOps, Jira 💡 What Sets Me Apart: I don’t just write code - I architect solutions. When you’re dealing with complex business requirements, you need someone who can translate abstract concepts into robust, scalable systems. Recent Wins: - Built secure payment processing system with Stripe (handling $50k+ monthly) - Migrated legacy .NET Framework app to .NET 8 (40% performance boost) - Integrated multi-vendor marketplace with PayPal, Stripe & bank transfers - Implemented real-time analytics dashboard with SignalR - Designed Azure-native solutions reducing infrastructure costs by 35% 🎯 Specialized In: ✅ Enterprise Web Applications ✅ Payment Gateway Integration (Stripe, PayPal, Square) ✅ Third-Party API Integration & Development ✅ REST/GraphQL API Development ✅ Cloud-Native Architecture ✅ Database Optimization & Design ✅ Legacy System Modernization ✅ Performance Tuning & Scaling 💳 Payment & Integration Expertise: -Payment Gateways:Stripe Connect, PayPal Express, Square APIs, Authorize.Net - Financial APIs: Plaid, Dwolla, banking integrations, cryptocurrency payments - Third-Party Services: Twilio, SendGrid, AWS SES, Google Maps, social logins - E-Commerce: Shopping cart integration, subscription billing, marketplace commissions - Security: PCI compliance, fraud detection, secure tokenization 🏭 Industry Experience: E-Commerce • FinTech • Healthcare • Real Estate • SaaS • Logistics • Marketplaces ⚡ My Process: 1. Deep Dive - I actually read your requirements (shocking, right?) 2. Smart Planning - Break complex problems into manageable pieces 3. Agile Delivery - Regular updates, no surprises 4. Quality Focus** - Clean code, proper testing, documentation 🌍 Availability: 📍 UTC+1 Timezone ⏰ 30-40 hrs/week 🗣️ Fluent English 📞 Flexible communication Why Choose Me? I’ve been where you are. Tight deadlines, complex requirements, budget constraints. I get it. That’s why I focus on delivering solutions that work reliably, scale properly, and don’t break the bank. Every project gets: - Detailed technical documentation - Clean, maintainable code - Comprehensive testing - Post-delivery support - NDA protection Ready to build something amazing? Let’s talk about your project. Ehtisham Zaki Senior .NET Architect & Full-Stack Developer ----- *Keywords: ASP.NET Core, C#, Blazor, Microservices, Azure, SQL Server, Web API, Angular, Docker, DevOps, Cloud Architecture, Enterprise Applications, Stripe Integration, PayPal API, Payment Processing, Third-Party APIs*

I am a Top Rated Full Stack .NET Engineer with 12+ years of experience, 7,000+ hours worked, and a 100% Job Success Score on Upwork. I specialize in building scalable, maintainable, and high-performance applications using modern .NET technologies. My focus is not just writing code, but delivering robust business solutions that are cleanly architected and production-ready. 🔧 Core Skills & Expertise ASP.NET Core / Web API Development RESTful API Design & Integration CQRS & MediatR (Clean Architecture patterns) Entity Framework Core (EF Core) SQL Server, PostgreSQL, MySQL Full Stack Development (Backend-focused with frontend integration) 🚀 What I Can Help You With Designing and developing scalable backend systems Building secure and high-performance REST APIs Refactoring legacy .NET applications Implementing clean architecture (CQRS, Mediator patterns) Database design, optimization, and performance tuning Troubleshooting and fixing complex production issues 💡 Why Clients Choose Me Proven track record with long-term clients Clean, maintainable, and well-documented code Strong problem-solving and debugging skills Reliable communication and on-time delivery I understand business requirements quickly and translate them into efficient technical solutions.