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I build modern web and mobile applications using .NET / ASP.NET Core, React, and MAUI — delivering robust back-ends, responsive front-ends and smooth cross-platform experiences. With 12+ years of solid experience in backend development, frontend frameworks, database work, and cross-platform app development, I’ve helped businesses deploy reliable solutions that scale. What I bring to the table: ✅ End-to-end ASP.NET Core backend (APIs, business logic, integrations) ✅ Front-end development with React (SPA, responsive UI, client-side logic) ✅ Cross-platform mobile/desktop apps using .NET MAUI — write once, run on multiple platforms ✅ Database design, optimization & migrations (SQL Server / MySQL), including complex data conversions ✅ Full-stack web apps: frontend + backend + database + integrations ✅ Clean, maintainable code with clear communication and timely delivery Whether you need a modern web app, RESTful API backend, or a cross-platform MAUI application, I deliver end-to-end, simplifying your project lifecycle. → C#, .NET 6 / .NET 7 / .NET 8 / .NET 9 → ASP.NET Core / MVC / Web API → React (JS/TS) → .NET MAUI (cross-platform apps) → JavaScript / TypeScript / HTML / CSS / Bootstrap → SQL Server / MySQL / Database Design & Optimization → Entity Framework / ORM → REST API / Backend Integrations → Full-Stack Web Application Development → Cross-Platform Mobile & Desktop App Development → Frontend-Backend Integration → Responsive UI / SPA Development → Code Maintainability & Clean Architecture → Version Control / Git ✅ What I Offer / Services Backend & API development: Build RESTful APIs, business logic, integrations, authentication, and data handling using ASP.NET Core Web front-end development: Create dynamic, responsive SPAs using React (JavaScript or TypeScript), integrating with back-end APIs Cross-platform apps (mobile & desktop): Use .NET MAUI to develop apps that run on Android, iOS, Windows (and other supported platforms) — ideal for maximum reach with minimum effort Database design and optimization: Design normalized schemas, optimize queries, migrate data between SQL Server / MySQL, and ensure efficient data handling Full-stack projects: Handle end-to-end development — from UI to backend to database — so you don’t need to coordinate between multiple freelancers Clean coding, maintainability & documentation: Write structured, readable code with good comments, version control, and documentation for easy future maintenance Let’s collaborate. Share your requirements, and I’ll propose a tailored solution that fits your needs and timeline.

As a seasoned Microsoft developer with over a decade of experience, I specialize in developing web, desktop, and mobile applications for both cloud and dedicated hosting environments. Recently, I have been focusing primarily on Artificial Intelligence. I've strong foundation in Python, Machine Learning, and Robotics, driven by a passion for innovation and intelligent system design. Over the past four years, I have focused on building, optimizing, and automating scalable machine learning pipelines that power real-world AI applications. Power BI, Tableau & Business Intelligence Consultant helping businesses turn messy Excel files and disconnected systems (Shopify, QuickBooks, Salesforce, SQL, ERP) into automated dashboards with zero manual reporting. ✅ Reduced reporting time by 70% with Power BI automation ✅ Built automated refresh pipelines eliminating manual exports ✅ 80%+ client return rate Expertise: Power BI, Tableau, DAX, SQL, Excel, Power Query, Microsoft Fabric, Azure, Snowflake, Databricks & Looker Studio. Experienced in executive dashboards, KPI reporting, data modeling, and BI automation across Finance, Healthcare, SaaS, Retail, and Operations. I have led software engineering and DevOps initiatives for large-scale cluster environments, ensuring high performance, reliability, and seamless support for advanced AI research. My work has contributed directly to the deployment and commercialization of cutting-edge machine learning solutions, successfully bringing sophisticated AI technologies to market. Core Skills ✅ Data Analysis, Modeling and Reporting ✅ BI, Graphs, Charts, Dashboards and Visualizations ✅ Business Process and Data Management ✅ AI, Python, LLM, Machine Learning ✅ C# .NET, Dynamics 365, Umbraco, ASP.NET Core MVC, ASP.NET Web Forms, ASP.NET Web API, Entity Framework ✅ Xamarin, MAUI, Prism, Xamarin.Forms, MVVM Cross ✅ Angular, AngularJS, React.js, TypeScript, JavaScript ✅ SQL Server, Database Optimization, Reports, Dashboards ✅ AWS Web Services, Azure, MongoDB, MSSQL, PostgreSQL ✅ XML, JSON, REST APIs ✅ Azure CMS, Kentico, SiteCore ✅ Twilio, WebRTC, Zoom SDK, Stripe Let's collaborate to achieve your goals and drive success in your projects!

**🚀 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*

Senior C#/.NET engineer and backend architect with 7+ years building high-performance APIs, complex databases, and AI-powered systems on .NET and Azure. 5,800+ hours delivered with a perfect client history. I design and ship production systems end to end, C#/.NET backends, SQL and NoSQL databases, cloud infrastructure, and modern AI (RAG, OpenAI, semantic search) integrated into real business software, not demos. Most teams can call an LLM; the hard part is making software correct under failure, fast at scale, and safe to put in front of a customer or a regulator. That's my work. BACKEND & DATABASES (core): C# • .NET Core • ASP.NET Core • .NET Framework 4.8 • REST APIs & Web API • Microservices • Entity Framework Core • Dapper • SignalR • Background Services • Distributed processing • SQL Server • PostgreSQL • MongoDB • Redis • Database design & query optimization • Multi-tenant architecture • ETL / SSIS / SSRS AI / LLM ENGINEERING: OpenAI • Anthropic Claude • RAG (Retrieval-Augmented Generation) • Hybrid retrieval + reranking • Semantic search • Vector databases (Qdrant, Pinecone, pgvector, MongoDB Atlas) • Semantic Kernel • Prompt engineering • Document intelligence & OCR • AI email classification CLOUD & DEVOPS: Microsoft Azure • Azure OpenAI • Azure DevOps • AWS • Docker • CI/CD • GitHub Actions FRONTEND: React • TypeScript • Blazor (Server & WebAssembly) • Razor Pages • Angular • JavaScript • HTML/CSS SPECIALIST: MICROSOFT OFFICE ADD-INS: Excel, Word & Outlook add-ins • VSTO • Office COM interop • add-in performance optimization — a niche most developers can't cover. WHAT I BUILD: - Enterprise backend systems & API platforms - AI-powered SaaS products, RAG & semantic search systems - Email processing, classification & workflow automation - Database platforms, data pipelines & legacy .NET modernization I've also spent 6+ years owning critical modules of a large-scale distributed system that processes data from millions of connected devices with zero-downtime reliability, deep experience with high-volume, mission-critical software. I think in systems, not features. Every decision starts with how information moves through your business, where time is being lost, and what can be automated safely, the result is software that's cheaper to run, easier to maintain, and built to scale. Whether you're adding AI to an existing product, modernizing a legacy .NET system, or need a backend that won't fall over under load, send me the details and let's talk.

I am expert in developing all types of VBA applications using Microsoft office Excel, Word, Power Point, Internet, Mainframe, FireFox, Oracle, SAP etc. WPF, MVVM, XAML, JSON Parsing, Prism, Design Principals etc. VSTO Addins Development for Office 2013 and 2016 (Office 365 REST APIs) Addin Express Development WCF, Web Service development. Developed enterprise applications like CRM, Digital Marketing Application, Survey Builder, E-Cart using WordPress and PHP development. ASP.NET, MVVM Architecture Development. Macro Creation, Large Scale Project Analysis, Reports Analysis, Data Analysis, Data Scrapping from various sites like Linkedin, Facebook, Amazon, Uber and many more portals. Uses of Selenium VBA Web Wrapper/IE HTML DOM/Python Beautifulsoup to scrap data from various sites. Expert in Outlook Solutions via CDO or VBA with Symantec Enterprise Vault like Auto mail triggered, Mail Capturing, Auto Mail Reply, Outlook Folder Management, Rules, HTML Template Creation, Attachments download, Task automation using core Outlook or Excel. Mail Merge solutions using Microsoft Word, CSV, Excel, MS Access etc. Microsoft Access Database automation, form development, reports development etc. Database management using MS Access, SQL Server, XMLDOM, SQL, Data migration from MS Access to SQL Server, Oracle, Linked Tables etc. Google Forms development, Google Spreadsheet Automation, Google Presentation Automation etc WordPress, WinAutomation Solutions. Microsoft Word, Microsoft Excel Template Creation, Formatting, Enhancement, Upgrade, Customized solution Like Ribbon, Add-ins development etc. Desktop Application development using VB.NET (C#), SQL Server etc Developed various Desktop Applications using Visual Basic 6 (VB6). Trouble Shooting Existing Applications, enhancement etc. Usage of Win APIs (32bit/64bit) to put the advanced level of support. Crystal report designing and Plugin with Visual Basic 6.0 (VB6.0) SQL Queries writing, Performance tuning, Database restructuring, Database Creation, Report Generation etc. HTML Template creation, HTML5, css, XPath, XSLT, XML, etc XMLHTTP Scripting to scrap data from various portals. Excel VBA to Visual Basic Conversion for existing solutions, Pivot Manipulation/Automaton, Slicers, ADODB connectivity, Excel Tables, Chart Automation, User Defined Formulas development etc. Financial underwriting, Financial Report Extracts, Balance Sheet, Cash Flow, Change in Equity etc Experience of Working on Production & Development Application Servers & Database Server (Tuning, Patching, Migration, up gradation and Maintenance) OEM & AWR-ASH-ADDM PHP, Laravel, Wordpress development. Very strong in Debugging with Procedure, Function, Triggers, Packages and other PL/SQL objects. Experience on Oracle RAC - ASM & Data Guard. Programming Languages SQL, PL/SQL , Shell Script Development Tools D2k(Oracle Forms 6.0 -6i & 10g)/(Oracle Reports 6.0-6i & 10G) ETL Angular JS, Angular 2,4,10,14, 16, 17, 18, HTML5, JavaScript, Bootstrap5, JQuery, ReactJS, Angular Material

I am a Software engineer with 12 years of experience, Has experience in working with startups to large scale company. I have domain knowledge of Homecare, Travel & ecommerce etc. ⚡ Quick Learner ⚡ Patient Work Discipline Against Obstacles ⚡ Ability to Prioritize Tasks ⭐ OOP and System Design; ⭐ Asynchronous and multithreading development (TPL); ⭐ Rest API design, architecture, implementation and integration; ⭐ GIT (VSTS, github, bitbucket), SVN and TFS version control systems; Skill Sets: 🌟 Creating web applications with Reactjs 🌟 Developing backend applications with .Net Core 🌟 Unit testing 🌟 Working with RDMS (MySQL) 🌟 Rest API development for mobile applications and frontend development needs 🌟 MS Access 🌟Asp.net webforms 🌟Sandata EVV 🌟Carebridge EVV