🚀 Let’s Solve Your Technical Challenges Amazon & eBay Automation : Need help auto-stocking, pricing, or listing across platforms? E-Commerce Customization : Want to customize your Shopify,nopcommerce, BigCommerce, or OpenCart store? Full Stack Development : Looking for a dedicated ASP.NET C# Web Developer? Performance Optimization : Struggling with site speed, cache management, or SQL/MySQL query tuning? Server Infrastructure : Need a robust server setup for your business? Expert Amazon API 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 / Expert Ebay API 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝗹𝗲𝗴𝗮𝗰𝘆 Application 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 NopCommerce Developer (Asp.net C#) ✔ Specializes in Full Stack .Net Framework Development → Windows Form, ASP.Net Web Form, MVC, Web API → ASP.Net Core MVC and Web API → C#, VB.Net → Entity Framework, Entity Framework Core → ADO.Net, LINQ ✔ Full-Stack JavaScript Developer | NodeJs | JQuery | Next JS | CMS | SaaS | AWS ✔ Microsoft SQL Server Expert Expert In eBay API. Amazon MWS API, Amazon FBA API, Query Optimization, Cache Management, Page Speed Optimization, Server Management Amazon SP-API (Seller Central) • Orders, inventory, and settlement sync across single and multi-account setups • Reimbursement automation catching lost/damaged inventory and fee errors Amazon owes you • FBA reporting, financial reconciliation, and Seller Central data pipelines • MWS-to-SP-API migrations for sellers still on legacy integrations Amazon Vendor API (Vendor Central) • Purchase order automation, shipment/ASN handling, and invoice reconciliation for 1P vendors • Vendor-side inventory and cost/price sync • Chargeback and deduction tracking to reduce revenue leakage Amazon Business API • B2B catalog, pricing, and quantity-discount integrations for Amazon Business sellers • Tax-exemption and business-customer order handling I have experience in building High-End database driven applications for customers from small to medium enterprises and entrepreneurial community. For the last 15+ years, I have worked with IT Services some of listed here 👇 ✨ Key Skill ✨ ✔️ ASP.NET / C# / ASP.NET Core / Asp Classic ✔️ SQL Server, MySql ✔️ PHP, OpenCart, Codeigniter, Shopify, BigCommerce, Liquid, Shopify Theme Development ✔️ JQuery, Ajax, Json, Css, Html, Twitter Bootstrap ✔️ Amazon MWS API. Amazon SP API, Amazon FBA API, Amazon MWS API ✔️ Amazon Web Service (AWS) , AWS Management Console ✔️ eBay API, Walmart Open API ✔️ Pay-pal API, Stripe API, Amazon Payment API, Autorized.net API , Stripe API ✔️ FedEx API, UPS API ✔️ SOAP/REST: integration of existing services, API, new services creation.Other web API integration ✔️ Web Scraping (Crawling), Amazon Web Scraping, Web Auto Login, JSON and XML parsing, Amazon To eBay Integrations Front-End Technology ✔️ Angular ✔️ Angular material ✔️ Ng content ✔️ Pipe ✔️ Typescript ✔️ VueJs Server Deployment ✨ Amazon ✨ ✔️ Amazon EC2 ✔️ Amazon Simple Storage Service (S3) ✔️ Amazon RDS ✔️ Amazon Lightsail ✨ Azure✨ ✔️ ServiceBus ✔️ AppServices ✔️ API Management ✔️ Cosmos DB ✔️ AzureSQL ✅ Amazon API Integration: Proficient in integrating various Amazon APIs including SP-API, DSP-API,Amazon MWS, and ADS-API to fetch and integrate real-time data, enabling informed decision-making. ✅ Store Inventory Management Automation: Expertise in automating and streamlining inventory management processes to ensure efficient operations. ✅ ChatGPT and OpenAI Integration: Leverage powerful technologies for enhancing customer interactions, automating customer support, and creating personalized experiences. Hire Best eBay API Developer Hire Best Amazon SP API Developer / Hire Amazon API Developer Hire Amazon MWS API Developer / Hire Esty API Developer / Hire Walmart API Developer Amazon SP API | Amazon Vendor API | Amazon Business API | Amazon Ads API | Amazon PPC | Amazon Advertising | Amazon MWS | Walmart API | Esty API | eBay API | API Integration | | Amazon Marketing Stream | Amazon Marketing Cloud | Speed Optimization | Amazon FBA | Amazon FBM | Seller Central Automation | Vendor Central AI | Reimbursement Automation | Inventory Management | Order Management System | Ecommerce Expert | API Integration | Claude API | MCP Server | AI Agents | Workflow Automation | n8n | Amazon Seller Automation | Custom Software Development | Full Stack Developer | Asp.net c# core Developer | Asp.net MVC Developer

Senior ASP.NET Core Developer | CRM, ERP & SaaS Expert | Blazor | Azure | SQL Server Hi, I'm Muhammad Bilal, a Senior ASP.NET Core Developer with 7+ years of experience building custom business applications that streamline operations, automate workflows, and scale with growing businesses. I help startups, SMEs, and enterprises transform complex business processes into secure, high-performance web applications using the Microsoft technology stack. What I Can Build 1. Custom CRM Systems 2. Enterprise ERP Solutions 3. Multi-Tenant SaaS Platforms 4. Business Process Automation 5. REST APIs & System Integrations 6. Admin Dashboards & Reporting 7. Real-Time Applications with SignalR 8. Azure Cloud Deployment & DevOps My Technical Expertise 1. Backend 1. ASP.NET Core 2. C# 3. ASP.NET MVC 4. REST APIs 5. Entity Framework Core 6. SignalR 7. JWT Authentication 8. OAuth 2. Frontend 1. Blazor Server 2. Blazor WebAssembly 3. Angular 4. HTML/CSS 5. JavaScript 3. Database 1. SQL Server 2. Database Design 3. Performance Optimization 4. Cloud & DevOps 1. Microsoft Azure 2. Docker 3. GitHub 4. CI/CD Pipelines 5. Architecture 1. Clean Architecture 2. Domain-Driven Design (DDD) 3. Microservices 4. Multi-Tenant Architecture Recent Project I designed and developed a complete CRM platform for the coworking industry that includes: 1. Lead Management 2. Member & Company Management 3. Desk & Meeting Room Booking 4. Automated Billing & Invoicing 5. Role-Based Access Control 6. Branch Management 7. Reporting & Analytics 8. Multi-Tenant SaaS Architecture The platform enables coworking businesses to manage daily operations from a single system while improving efficiency and reducing manual work. Why Clients Choose Me 1. Strong understanding of business processes—not just code. 2. Clean, scalable, and maintainable architecture. 3. Secure, production-ready applications. 4. Clear communication throughout the project. 5. Reliable delivery and long-term support. I don't simply develop software—I build solutions that solve real business problems and are designed for future growth. If you're looking for a developer who can take your project from concept to deployment with a focus on quality, scalability, and business value, I'd be happy to discuss your requirements. Thanks, Muhammad Bilal Senior ASP.NET Core Developer

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 .NET Developer Upwork 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 Core Skills .NET 10, C#, ASP.NET Core, Entity Framework Core, Blazor, Razor Pages, .NET MAUI, Avalonia UI, React, Next.js, JavaScript, TypeScript, SQL Server, PostgreSQL, MySQL, MongoDB, Redis, Azure, AWS, Docker, REST APIs, SignalR, OpenAI, Claude, Gemini, Semantic Kernel, RAG, MCP, AI Agents, AI Automation, WordPress, WooCommerce, Microservices, Clean Architecture, DevOps, CI/CD, Enterprise Software, SaaS Development, Desktop Applications, Mobile Solutions. ASP.NET Webform, VB.NET, ASP.NET Core, NETMUAI, C#, Blazor, Microservices, Azure, SQL Server, Web API, Angular, Docker, DevOps, Cloud Architecture, SSRS, Enterprise Applications, Legacy application, Stripe Integration, PayPal API, Payment Processing, Third-Party APIs

Hi - 𝗜'𝗺 𝗮 𝗧𝗿𝘂𝘀𝘁𝗲𝗱 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 𝗳𝗿𝗲𝗲𝗹𝗮𝗻𝗰𝗲𝗿 𝘄𝗶𝘁𝗵 𝗮 𝟭𝟬𝟬% 𝘀𝘂𝗰𝗰𝗲𝘀𝘀 𝗿𝗮𝘁𝗲, 𝗜 𝗽𝗿𝗼𝘃𝗶𝗱𝗲 𝗲𝘅𝗽𝗲𝗿𝘁 𝘁𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝘀𝗸𝗶𝗹𝗹𝘀 𝗮𝗻𝗱 𝘀𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗰 𝗶𝗻𝘀𝗶𝗴𝗵𝘁𝘀 𝘁𝗼 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝘀𝘂𝗰𝗰𝗲𝗲𝗱 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲𝗹𝘆. With over 10 years of dedicated experience in the full lifecycle of web application design and development, I possess a deep understanding of building sophisticated and scalable solutions. My core strengths are firmly rooted in the Microsoft and JavaScript ecosystems, making me particularly well-suited for your project needs. 𝗖𝗼𝗿𝗲 𝗦𝗸𝗶𝗹𝗹𝘀 ✅ C#, .Net ✅ .NET 6, .NET 7, .NET 8, .NET Framework, .Net Core ✅ ASP.NET, ASP.NET Core, ASP.NET MVC, ASP.NET Web Forms ✅ ASP.NET Web API, MVC with Razor Views, VB.NET ✅ Node.js, Express.js, Nest.js, Entity Framework, Entity Framework Core ✅ React js development ✅ Angular JS development ✅ Next js development, Redux | Flux ✅ TypeScript | JavaScript | jQuery 𝗛𝗲𝗿𝗲’𝘀 𝗛𝗼𝘄 𝗜 𝗠𝗮𝗸𝗲 𝗬𝗼𝘂𝗿 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝗦𝗵𝗶𝗻𝗲: - Crafting responsive web applications that look and perform beautifully on any device - Writing clean, organized code that’s easy to maintain and scale - Rapidly developing MVPs on Bubble.io and delivering high-quality no-code solutions - Optimizing performance for fast, efficient user experiences - Offering ongoing support post-launch to ensure everything runs perfectly. I believe a successful project is built on strong collaboration and open communication. Hit that 𝗕𝗜𝗚 𝗚𝗥𝗘𝗘𝗡 𝗕𝗨𝗧𝗧𝗢𝗡 right now and send me a message. Let's build something amazing together! Manu M. Keywords ASP.NET Core C# ASP.NET MVC Java Core PHP .NET Framework WebSockets Web Application Website API Design ReactJS Next.js TypeScript HTML5 CSS3 SCSS / SASS Bootstrap Tailwind CSS Material-UI Angular JavaScript Responsive Design Back-End Development Node.js Nest.js Express.js MERN Stack RESTful APIs GraphQL Microservices API Development Web App Developer Databases & Data Management SQL PostgreSQL MySQL MongoDB DynamoDB Database Administrator Database Specialist Cloud & DevOps AWS (Amazon Web Services) Azure Cloud Platforms Docker Containerization CI/CD Jenkins S3 EC2 Azure DevOps Full Stack Developer Frontend Developer Backend Developer Web Development Specialist Agile Project MVP Development Performance Optimization Specializations & Integrations Ecommerce Website Third-Party APIs Integration Charts 3D Visualization Browser Extension Web App Developer UX/UI Design Figma NET Framework Expert .NET Core Expert C# Expert, Azure Specialist ASP.NET Core Specialist ASP.NET Core MVC .NET Core MVC, SQL Expert Expert .NET Developer .NET Framework Expert .NET Core Expert, C# Expert, Azure Specialist ASP.NET Core Specialist ASP.NET Core MVC .NET Core MVC SQL Expert Expert .NET Developer .NET Framework Expert .NET Core Expert C# Expert, Azure Specialist ASP.NET Core Specialist ASP.NET Core MVC

👋 Hi, I'm Paresh Bhatewara. 🏆 15+ Years of Experience 🏆 Top Rated Plus Freelancer 🏆 98% Job Success 🏆 $100K+ Earned on Upwork 🏆 63 Successfully Completed Projects I'm a Senior .NET Developer specializing in C#, .NET Core, ASP.NET Core, Blazor, SQL Server, and Microsoft Azure. For more than 15 years, I've helped startups, SMBs, SaaS companies, and enterprise organizations build secure, scalable, and high-performance software that solves real business problems. Whether you're launching a new SaaS product, modernizing a legacy .NET application, developing secure REST APIs, building Windows desktop software, migrating to Microsoft Azure, or maintaining an enterprise application, I deliver production-ready solutions with clean, maintainable code. ✦ What I Can Help You Build ➤ Web Application Development ✔ ASP.NET Core Applications ✔ ASP.NET MVC Applications ✔ Blazor Applications ✔ Enterprise Web Applications ✔ SaaS Platforms ✔ CRM & ERP Systems ✔ Custom Business Applications ✔ REST API & ASP.NET Web API ✔ Microservices Development ✔ Third-Party API Integration ➤ Desktop Application Development ✔ WPF Applications ✔ WinForms Applications ✔ Windows Desktop Software ✔ Legacy .NET Modernization ➤ Mobile Application Development ✔ .NET MAUI ✔ Xamarin ✔ Cross-Platform Android & iOS Applications ➤ Database Development ✔ SQL Server ✔ Entity Framework ✔ LINQ ✔ Stored Procedures ✔ Database Design ✔ Query Optimization ✔ Performance Tuning ➤ Azure Cloud Development ✔ Microsoft Azure ✔ Azure App Services ✔ Azure Functions ✔ Azure SQL Database ✔ Azure DevOps ✔ Azure Storage ✔ Cloud Migration ✔ Third-Party API Integration ✔ Payment Gateway Integration ✦ Best Fit Projects ➜ Custom Software Development ➜ Enterprise Software Development ➜ SaaS Product Development ➜ Legacy .NET Modernization ➜ ASP.NET Core Migration ➜ REST API Development ➜ Microservices Architecture ➜ Azure Cloud Applications ➜ Desktop Software Development ➜ Business Automation Solutions ✦ Core Technologies Backend C# • .NET Framework • .NET Core • ASP.NET • ASP.NET Core • ASP.NET MVC • Blazor • ASP.NET Web API • REST API • Entity Framework • LINQ • VB.NET Frontend React.js • JavaScript • HTML5 • CSS3 • Bootstrap • jQuery Desktop WPF • WinForms Mobile .NET MAUI • Xamarin Database SQL Server • Entity Framework • Stored Procedures • Database Design • Performance Optimization Cloud & DevOps Microsoft Azure • Azure DevOps • Azure App Services • Azure Functions • Git • GitHub • CI/CD ✦ Industries Healthcare • Finance • Banking • Insurance • Manufacturing • Logistics • Transportation • Retail • E-commerce • Real Estate • Education • Human Resources • CRM • ERP • SaaS • BusinessAutomation ✦ My Development Process Understand → Plan → Develop → Test → Deploy → Support ➤ Understand your business goals and technical requirements. ➤ Design the right architecture and technology stack. ➤ Develop clean, scalable, and secure applications. ➤ Perform detailed testing and optimization. ➤ Deploy safely with minimal downtime. ➤ Provide long-term maintenance and feature enhancements. ✦ What Clients Say ⭐ "Completed the project on time and on budget." ⭐ "Highly recommend Paresh for anyone looking to build scalable and secure software." ⭐ "Outstanding job in both development and requirement gathering." ⭐ "Very knowledgeable in .NET and always delivered high-quality work." ⭐ "Excellent communication and reliable delivery throughout the project." ⭐ "Production-ready solution with great attention to detail." ✦ Why Clients Choose Me ✔ 15+ Years of Professional Experience ✔ Top Rated Plus Freelancer ✔ 98% Job Success ✔ $100K+ Earned on Upwork ✔ 63 Successfully Completed Projects ✔ Strong Expertise in ASP.NET Core, Blazor, Azure & SQL Server ✔ Enterprise Software Development Experience ✔ Clean & Maintainable Code ✔ Scalable Software Architecture ✔ Performance Optimization ✔ Secure Development Practices ✔ Excellent Communication ✔ Reliable & On-Time Delivery ✔ Long-Term Technical Partnership ✔ Business-Oriented Solutions ✦ Let's Build Something Great If you're looking for a Senior .NET Developer who can build, modernize, or scale your application using C#, ASP.NET Core, Blazor, SQL Server, and Microsoft Azure, I'd be happy to discuss your project. 📩 Send me a message today, and let's build reliable software that helps your business grow.

I build production-grade AI features and .NET systems that ship and stay reliable not demos that break under real load. Top Rated, 100% Job Success, 7+ years in ASP.NET Core, C#, and React, now specialized in AI integration with OpenAI, Claude, and Microsoft Semantic Kernel. I am the CTO at Owasoft Technologies, and I still architect and build hands-on. When you hire me, you get the person who owns the technical outcome architecture decisions, code review, and the production rigor that separates software that demos well from software that's still running years later. Behind me is a senior team for depth and continuity, but you deal directly with me. I focus on two things: AI integration into real systems. I embed working AI into existing .NET applications not prototypes, production features: AI chatbots and assistants in ASP.NET Core apps, document Q&A with RAG pipelines, intelligent search and workflow automation, vector database integration (pgvector, Pinecone), and Azure OpenAI deployments with proper auth, rate limiting, and cost controls. I hold Microsoft's Azure OpenAI certification few .NET engineers do. Full-stack .NET builds. Clean backend architecture through polished frontend: ASP.NET Core / MVC / Web API (.NET 3.1–8), C#, Entity Framework, Dapper, MS SQL and PostgreSQL, with React, Angular, or Blazor on the front. SaaS platforms, CRMs, admin dashboards, REST APIs, and third-party integrations, plus legacy .NET modernization and performance work. How I keep it predictable: clear milestones with weekly updates, clean documented code, and problems flagged early no surprises at the deadline. Proof: a 5-month, 325-hour enterprise engagement I delivered end-to-end "He followed our business requirements perfectly and was always available whenever we had issues." (Kevin, 5★). I engineer from Pakistan and work hours that overlap US business time , I am upfront about where I am, because that's how you know the rest holds up too. Stack: ASP.NET Core · C# · .NET 8 · Entity Framework · React · Angular · Blazor · MS SQL · PostgreSQL · Azure · OpenAI · Claude · Semantic Kernel · RAG · SignalR · REST APIs If you need a senior engineer who can build AI-powered .NET software that survives real users, send me a message or invite me to your job.

I am a .NET Full Stack Developer with 6+ years of experience building scalable, secure, and high-performance web applications using ASP.NET Core and modern frontend technologies. I specialize in developing custom ERP systems, business applications, and data-driven solutions that help companies streamline operations and improve efficiency. My expertise includes C#, ASP.NET Core, Web API development, SQL Server, and Entity Framework, along with frontend integration using React.js. I have hands-on experience working with complex systems, optimizing performance, and converting legacy applications into modern, maintainable architectures. I focus on writing clean, efficient code and delivering solutions that are reliable, scalable, and aligned with business goals. Core Skills: ASP.NET Core C# / VB.NET Web API Development SQL Server / Database Design Entity Framework / LINQ React.js DevExpress ERP & Business Applications REST API Integration Performance Optimization What I Can Help You With: Custom ERP and business application development ASP.NET Core Web API development and integration Bug fixing and performance optimization Legacy system upgrade to .NET Core Database design and query optimization Full-stack development with React and .NET I am committed to delivering high-quality solutions with clear communication and on-time delivery.

I build scalable SaaS and enterprise applications using C#, ASP.NET Core, .NET 8/9, Azure, REST APIs, and AI. I help businesses modernize legacy .NET systems, fix complex backend and performance issues, and build secure applications designed to scale. From architecture and full-stack development to cloud deployment, API integrations, performance optimization, and AI implementation, I provide end-to-end development with a strong focus on clean code, scalability, security, and long-term maintainability. # Core Expertise ✔ C# | .NET 8/9 | ASP.NET Core | Web API ✔ Full Stack .NET Development | Angular | React | TypeScript ✔ REST APIs | Microservices | Distributed Systems ✔ SQL Server | PostgreSQL | Entity Framework Core | Dapper ✔ Microsoft Azure | AWS | Docker | GitHub Actions | CI/CD ✔ JWT | OAuth 2.0 | OpenID Connect | ASP.NET Core Identity ✔ Clean Architecture | SOLID | CQRS | MediatR | Design Patterns ✔ Performance Optimization | Scalability | Application Security # AI & Modern Application Development *AI Development *AI chatbots and assistants *OpenAI/Azure OpenAI integration *RAG-based knowledge systems *Document intelligence *Semantic search *Vector search and embeddings *AI workflow automation *AI features embedded into SaaS applications What I Can Help You With *SaaS & Enterprise Development *ASP.NET Core / .NET 8/9 *REST APIs & Microservices *Azure Cloud Architecture *SQL Server & PostgreSQL Optimization *Legacy .NET Modernization *OpenAI / Azure OpenAI Integration Why clients choose me ✔ 10+ years of professional development experience ✔ 70+ successfully completed Upwork jobs ✔ 100% Job Success ✔ Top Rated Plus ✔ 5.0 client rating ✔ 5.7K+ Upwork hours ✔ Strong experience with SaaS and enterprise applications ✔ Long-term development and maintenance experience Whether you need to build a SaaS product from scratch, develop secure APIs, modernize a legacy .NET application, migrate to Azure or AWS, optimize an existing system, scale your architecture, or integrate AI into your product, I can help. Let’s build secure, scalable, high-performance software that delivers real business value.

Hello! I’m Asher, a Senior Full-Stack Engineer with 8+ years of experience delivering scalable, high-performance web applications across finance, logistics, healthcare, and SaaS. I specialize in building enterprise-grade solutions, migrating legacy systems, and providing long-term application support. 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗼 𝗕𝗲𝘀𝘁 Full-Stack Web Development: ASP .NET Core, Blazor, MVC, Angular, React, Razor Pages Backend & API Engineering: RESTful APIs, SignalR, Clean Architecture, Microservices Database Optimization: SQL Server, Entity Framework Core, Query & Stored Procedure Optimization Legacy System Migration: Modernizing Web Forms and older .NET apps to ASP .NET Core with modern frontends DevOps & Deployment: Azure, AWS, IIS, Docker, CI/CD Pipelines 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲? Proven Expertise: Delivered 20+ .NET projects with measurable results Scalable Solutions: Applications designed to grow with your business Client-Centric Approach: Clear communication, timely delivery, dedicated support Future-Proof Development: Clean, maintainable, and well-documented code Continuous Learning: Staying ahead with the latest technologies Ideal Clients & Projects Teams seeking a full-stack lead bridging C# and modern JS frameworks Companies with existing .NET apps needing frontend refresh or full-stack migration Projects requiring long-term maintenance and ownership Clients seeking predictable, high-quality delivery over low-cost short-term work 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀: .NET Developer Upwork .NET Development Upwork ASP.NET Developer Upwork ASP.NET Core Developer Upwork C# Developer Upwork .NET Web Development Upwork .NET Application Development Upwork .NET Software Developer Upwork .NET API Development Upwork .NET Backend Developer Upwork .NET Full Stack Developer Upwork ASP.NET MVC Developer Upwork .NET Core Developer Upwork .NET Microservices Developer .NET REST API Developer .NET Web API Development .NET Enterprise Application Development .NET Database Development .NET SQL Server Developer .NET Azure Developer .NET Cloud Application Development .NET Integration Developer .NET Performance Optimization .NET Maintenance and Support .NET Migration & Upgrade Services 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀 Full-Stack .NET Developer, Backend .NET Developer, ASP .NET Core, C#, ASP .NET MVC, Web API, RESTful APIs, Microservices, Clean Architecture, SignalR, Blazor Server, Blazor WebAssembly, Razor Pages, Angular, React, Responsive Web Design, HTML5, CSS3, JavaScript, Bootstrap, SQL Server, Amazon SP-API, SOAP API, Query Optimization, Stored Procedures, Database Optimization, Entity Framework Core, Database Migration, Legacy System Migration, Web Forms Migration, Performance Optimization, Azure, Azure DevOps, AWS, CI/CD Pipelines, Docker, IIS, Agile Development 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲 Part-time or full-time contracts Reliable US/EU timezone overlap 𝗟𝗲𝘁’𝘀 𝗕𝘂𝗶𝗹𝗱 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗘𝘅𝘁𝗿𝗮𝗼𝗿𝗱𝗶𝗻𝗮𝗿𝘆! Send me your project details, and I’ll reply in less than 1 hour with a clear plan and honest recommendations. Ready to accelerate your roadmap? 𝐂𝐥𝐢𝐜𝐤 “𝐈𝐧𝐯𝐢𝐭𝐞” or message me with a quick brief, and I’ll outline a solution within 24 h.

I'm a .NET full stack developer with 10+ years building web applications that businesses actually run on. I take an idea and ship it — front end, back end, database, deployment — and I've done it for products still serving customers a decade later. ✦ WHAT I DO BEST My core stack is .NET and C#, and I've worked in C# for more than 10 years. As a .NET Developer I build secure, scalable back ends with .NET Core and ASP.NET Core, expose them as clean ASP.NET Web APIs (REST), and back them with Entity Framework and SQL Server or PostgreSQL. As an ASP.NET web developer I pair those APIs with responsive front ends in Angular, React, or Blazor — clients often bring me in as a React developer on the front end and a C# developer on the back in the same engagement — then deploy and scale on Azure with Azure DevOps, Docker, and CI/CD. When a WordPress developer's templated build has hit its ceiling, teams ask me to rebuild it as a custom .NET web application that can actually grow. ✦ PROOF OF WORK Longevity is the point. I took a rough idea from an automotive client and built it into an e-commerce platform that has served customers for nearly 15 years and still runs today. As the lead .NET Developer on Launch Control, a real-estate SaaS, I refactored the core and made the system 50x faster. I built SiftScore, an AI talent-acquisition platform that uses the OpenAI API to source and score large datasets. Across fintech, real-estate and healthcare I've owned the full lifecycle as a Full Stack Developer: requirements, architecture, build, go-live. 🚀 SaaS MVPs BUILT TO OUTLIVE THE MVP STAGE When a client starts from a rough idea, I take it the full way: requirements, architecture, prototyping, build, and go-live on Azure. As a Full Stack Developer I've shipped 3+ .NET SaaS platforms across fintech, real-estate and conveyancing — MVPs that can realistically evolve into long-term SaaS products, with the scalability and monitoring to grow once real customers arrive, rather than throwaway prototypes. ✦ INTEGRATIONS AND API-DRIVEN SYSTEMS Most of what I build connects to something else. I've wired .NET back ends to EDI 5010 claims feeds under HIPAA, GPS telematics hardware, handheld warehouse scanners, ERP and CRM systems, and payment providers — and I've shipped multi-tenant .NET Core Angular applications serving several client organisations from a single codebase. ✦ AI INTEGRATION FOR EXISTING PRODUCTS When projects require AI functionality, I bring hands-on experience integrating it into production systems. While my primary role remains Full Stack Developer and .NET Developer, I regularly add LLM-driven features, smart search and data-processing pipelines to existing web applications — usually by integrating a proven model (OpenAI, Claude, Gemini not limited to these 3 models) through a thin Python layer rather than training your own. Most AI features fail not because of the model but because the surrounding .NET architecture wasn't built to support them. What I deliver is reliable, observable and cost-controlled rather than experimental. ⚙️ MODERNIZING LEGACY .NET — WITHOUT THE BIG-BANG REWRITE Old code isn't the enemy — downtime is. As a .NET Developer I upgrade aging ASP.NET and ASP.NET MVC systems: a clean API layer, data access migrated to Entity Framework Core, refactoring against SOLID principles, all without freezing feature work. Stuck on ASP.NET WebForms? I migrated a WebForms spare-parts store — 20M+ products across 100+ suppliers — to ASP.NET MVC by running both side by side in one solution, so the business kept selling while the modernization happened underneath it. I move the application page by page behind a feature flag, so new and old run together in production and any screen can roll back instantly. The same incremental approach moves teams off PHP, Laravel or legacy WordPress builds and onto a maintainable .NET stack: ship value continuously, retire old code gradually, never go dark. ✦ ENTERPRISE-GRADE .NET ARCHITECTURE My work goes deeper than features. On a large enterprise fintech platform built on microservices I designed how the team builds — onboarding developers, setting architectural standards, and structuring a clean, maintainable .NET codebase that scales. As a .NET software engineer with over 10 years across .NET Framework, .NET Core, ASP.NET and ASP.NET MVC, plus an M.Sc. in Applied Mathematics behind the design decisions, I build systems meant to last years, not quarters. I'm a web developer, not a native mobile app developer working in Flutter or React Native — on the .NET side I do ship cross-platform with .NET MAUI. ✦ HOW WE'LL WORK If you need a Full Stack Developer or .NET Developer who can take something from rough idea to production — and keep it running for years — send me a note and I'll reply within 8–12 hours with the fastest path to shipping it.