Hire the Best Windows Forms Developers

With 10+ years of deep technical expertise, I architect and deliver mission-critical software solutions that bridge the gap between legacy systems and next-generation AI capabilities. My career is defined by transforming complex, high-stakes business challenges across US Healthcare, Defense, Aerospace, and Manufacturing into operational excellence. I am not merely a developer; I am a technical partner who ensures your software is scalable, secure, and sustainable. My approach combines a mastery of the Microsoft ecosystem with advanced artificial intelligence to solve problems that others consider impossible, specifically in biometric security, document parsing, and real-time communications. Core Value Proposition: I provide end-to-end solution architecture with full-cycle development ownership, from architectural blueprints to deployment. I ensure your project is architected for the long-term utilizing robust CI/CD pipelines and clean, maintainable code. I specialize in embedding intelligence into existing workflows, whether it is automating complex document processing, building AI Agents, or integrating RAG pipelines to turn data into a strategic asset. My background in Defense and US Healthcare ensures that security is not an afterthought, specializing in secure biometrics integration (ZKTeco, Mantra, Cogent) and cryptography to meet strict regulatory standards. My technical expertise spans the complete Microsoft stack and emerging technologies. For web and cloud, I utilize ASP.NET Core, MVC, Blazor, RESTful APIs, Entity Framework, and SQL Server across Azure and AWS. For desktop and cross-platform, I build using WinForms, WPF, .NET MAUI, and Xamarin. In AI and automation, I leverage RAG, AI Agents, Custom MCP Servers, ML.NET, and Python with Flask, FastAPI, TensorFlow, and PyTorch. I am an expert in biometrics and IoT, integrating ZKTeco (F22), eSSL, Cogent, Mantra, and Safran. For complex document processing, I handle S1000D for defense and aerospace, advanced OCR, and PDF manipulation. In healthcare, I manage EDI claims processing (837, 835, 277) and provider systems. I also specialize in real-time communications via TCP/IP, WebSockets, and payment gateways like Stripe, PayPal, PhonePe, and UPI. Why work with me? With 18 years in the field, I bring stability and foresight that junior developers cannot offer, anticipating pitfalls and designing systems that withstand the test of time. I understand the nuances of healthcare compliance, defense standards (S1000D), and manufacturing logistics. I leverage the robustness of C# and .NET with the agility of Python for data-heavy tasks, allowing me to choose the right tool for the job. I am passionate about Agile methodologies, ensuring transparency, rapid iteration, and continuous delivery. What I deliver is clear: for healthcare, streamlined EDI transactions, secure patient portals, and biometric authentication; for defense and aerospace, S1000D-compliant documentation and secure logistics software; and for enterprises, intelligent automation, AI-driven insights, and robust, scalable architectures. Let's connect to discuss how I can bring your vision to life with reliability and high-performance execution.

200+ production systems delivered. 100% Job Success Score held for 5 consecutive years. If you need a full stack developer who takes complete ownership from the first requirements session to a live, scalable system deployed - that is the track record behind every project I take on, and the reason clients keep coming back. I build custom ERP, CRM, SaaS, POS, and full stack web applications for businesses in construction, manufacturing, healthcare, and enterprise software. Working across .NET, React, TypeScript, Node.js, MS SQL, MySQL, PostgreSQL, MongoDB. and Azure. I deliver systems that hold up under real business load years after launch - not just during the demo. ✅ Top Rated | 18+ Years Building Enterprise Software in Production ✅ 200+ Custom ERP, CRM, POS, and SaaS Platforms Delivered End to End ✅ 100% Job Success Score - 7 Consecutive Years Without a Single Failed Engagement ✅ Full Stack Developer: .NET, React, TypeScript, Node.js, MS SQL, PostgreSQL, MySQL, MongoDB, and Azure, DevOps ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⭐⭐⭐⭐⭐ CLIENT RESULTS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ "Haider was an excellent contractor to work with. He understood the requirements well and delivered to spec, on budget, and on time. I would happily recommend Haider to others." - Verified 5-star review "Great and fast - did the things and logical design in a very fast and professional way. Looking forward to new projects soon." - Verified 5-star review ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔷 SYSTEMS I HAVE DELIVERED ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ SR360 - Full multi-tenant cloud CRM/ERP for a remodeling business covering sales pipeline, job costing, commissions, and accounting, built on .NET, React, and Azure SQL. AYAS - NDIS and GDPR-compliant service booking platform with Google and Outlook calendar integration, supporting admin, provider, and client roles with full compliance audit trails. Vakency - Recruitment CRM for enterprise IT hiring teams on .NET, React, TypeScript, and Azure with automated notification workflows and full CI/CD. Quote Master - React and Dot Net based Web App that simplifies complex cost estimation, quote generation and job management process for Windows and Doors Manufacturer ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔷 WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Custom ERP and CRM Development Multi-module ERP and CRM platforms built from scratch around your exact workflows - not adapted templates. Sales, job costing, inventory, commissions, and accounting consolidated into one maintainable system. Built on .NET Core and React, deployed on Azure with CI/CD from day one. ▸ SaaS and Multi-Tenant Platform Development Full stack SaaS platforms with clean tenant isolation, role-based access control, subscription and license management, and third-party API integrations. Designed to scale on Azure without architectural rework later. ▸ Full Stack Web Application Development React, Next.js, TypeScript, Node.js, NestJS, .NET Core 8, REST API - integrated end to end. As a full stack developer I own every layer: frontend, backend, database schema, and Azure cloud infrastructure, with no handoffs between layers. ▸ AI-Integrated Business Applications Embedding AI capabilities into production business systems - OpenAI API integrations, intelligent workflow automation, and AI-powered processing within custom ERP, CRM, and SaaS platforms built on .NET Core and Node.js. ▸ Legacy .NET Modernization Taking over inherited .NET, VB.NET, ASP.NET, WinForms, or WPF codebases and migrating them to .NET Core 8, or rebuilding as modern full stack web applications - without losing critical business logic or operational data. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠 TECH STACK ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚡ Frontend: React.js, Next.js, TypeScript, JavaScript, Tailwind CSS, Material UI, DevExtreme, DevExpress ⚡ Backend: .NET, ASP.NET MVC, Node.js, NestJS, C#, REST API ⚡ Database: PostgreSQL, Azure SQL, MS SQL Server, MySQL, SQLite, MongoDB ⚡ Cloud: Azure App Services, Azure Functions, Azure DevOps, AWS, Docker, CI/CD, Git ⚡ Reporting: SSRS, Crystal Reports, RDLC, DevExpress Reports ⚡ Desktop: C# WinForms, WPF, DevExpress ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔷 HOW I WORK ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ I work as business analyst, solution architect, and hands-on full stack developer at the same time. You get system-level architecture thinking and full accountability on delivery. No handoffs between layers. No out-of-scope surprises. No disappearing after go-live. Every project starts with a structured requirements session - no formal spec required. Rough ideas get shaped into executable plans before a single line of code is written. Agile iteration cycles deliver working software in your hands within weeks, tested and ready for feedback. Share what you are building and I will come back with a clear architecture and a realistic timeline before committing to anything.

Over 15 years of software development expertise: small- to large-scale projects. GUI, console, multi-tier, web, service and embedded applications. Line of Business applications. Amazon MWS API. Application domain modeling. Domain Driven Design. Distributed telemetry systems. Mission-critical telecommunication applications. Freelance/independent software development/consulting experience. Ability to lead small groups of developers. SPECIALTIES: - C#, C++, C, Objective-C; - .NET, .NET Core, EntityFramework, WebApi, WPF, MSMQ, MS Prism, MS Unity, etc.; - JSON, XML, XSLT, HTML; - Database design, stored procedures, MS SQL Server/CE, Oracle, Sqlite; - OOA&D, OOP, UML, CI, Design Patterns, UI; - Visual Studio, MSBuild, NUnit, NAnt, CCNET, SVN, TFS, ClearCase, MKS, VSS, Git, GitHub, Bitbucket; - Cocoa, Core Data, Xcode; - Enterprise Architect, Rational Rose, Visio.

I'm a senior .NET developer with over 12 years on Upwork, specialising in Windows desktop applications, legacy system work, and business integrations across the Microsoft stack. My background is broad, but where I'm most useful is on the harder projects — undocumented codebases, legacy migrations, ERP integrations, and end-to-end delivery of complex Windows software. These are the kinds of projects I've built a reputation around. A recent example: I designed and built a full Windows Assistant platform using WPF — combining video capture, SharePoint content management with a Windows Explorer-style interface, a locally cached SQLite database with a background sync service, and a Web API built on a clean services/infrastructure architecture over Entity Framework Core and SQL Server. The system included SignalR real-time notifications, JWT authentication, and integrations with Vimeo, Twilio, SmileBack and others, alongside a complete MVC admin portal. What I work on: Legacy systems — VB6, Visual FoxPro, VB.NET, WinForms, WPF. I regularly take on codebases other developers decline, and I'm comfortable working in undocumented or inherited code. ERP and business integrations — SAP, SAGE, MYOB, SQL Server, Oracle, Shopify, DocuSign, Amazon API and more. I've worked across insurance, logistics, and enterprise clients and understand how business-critical systems need to behave. I ask the right questions before I start, flag issues early, and deliver on time. Clients tend to come back for that as much as the technical work. Tech I work with: WPF · WinForms · C# · .NET / ASP.NET · WCF · Entity Framework Core · SQL Server · Oracle · SQLite · SignalR · JWT · REST APIs · SharePoint · MS Office Add-ins · SAP · SAGE · MYOB · VB6 · VB.NET · Visual FoxPro · Shopify · DocuSign · Amazon API · Vimeo · Twilio · MVC

Senior .NET developer with 25+ years of hands-on experience working on real production systems. I help companies stabilize, modernize, and extend desktop and legacy .NET applications, taking ownership of existing codebases and delivering clean, maintainable solutions that work reliably long-term. Most of my work involves improving existing Windows desktop applications rather than building throwaway prototypes. I regularly take over mature or poorly documented systems, identify structural and stability issues, and extend functionality without disrupting production workflows. Clients usually come to me when a system is business-critical and needs careful, senior-level handling. My core expertise is in Windows desktop development using C#, WPF, WinForms, and the .NET Framework. I also have extensive experience supporting and modernizing legacy systems built with VB.NET, VBA, C++, and Delphi, including Office automation, custom installers, file system integration, and data-processing tools. For modernization and supporting services, I work with .NET Core, ASP.NET, Razor Pages, and REST APIs, which allows me to evolve legacy desktop systems, build internal web tools, or deliver complete end-to-end solutions when needed. I follow proven architectural practices such as MVVM, layered design, version control with Git, and predictable deployment processes. I’ve completed 120+ projects and 37,000+ hours on Upwork, working primarily on long-term and technically demanding systems where reliability, clarity, and ownership matter more than quick fixes. If you’re looking for a dependable senior .NET developer who can take responsibility for an existing system or build a stable desktop application from scratch, I’d be happy to discuss your project.

🚀 Senior Full Stack Developer | Cloud Architect | AI Integration Specialist 💼 14+ years of professional software development experience ⚙️ C#, .NET, ASP.NET Core, Node.js, PHP 🎨 React, Angular, Next.js, TypeScript 🤖 OpenAI API, Hugging Face, Pinecone, FAISS, n8n, Zapier ☁️ Azure, AWS, CI/CD, scalable architecture 🔌 Google APIs, QuickBooks, Twilio, Zoho CRM, SendGrid Hi, I’m Senior Full Stack Developer with 14+ years of experience building, modernizing, and scaling web applications. I specialize in ASP.NET Core, C#, React, Angular, Next.js, cloud architecture, API integrations, and practical AI solutions. I help businesses build reliable web applications and add AI-powered features such as AI chatbots, document search, RAG-based assistants, workflow automation, smart dashboards, and AI-powered SaaS functionality. WHAT I CAN HELP YOU WITH * Building scalable web applications from scratch * Modernizing legacy .NET, ASP.NET MVC, Web Forms, or PHP systems * Developing secure REST APIs and backend services * Creating responsive frontends with React, Angular, Next.js, and TypeScript * Integrating third-party APIs such as Google APIs, QuickBooks, Twilio, Zoho CRM, SendGrid, and Zapier * Adding AI features using OpenAI API, Hugging Face, Pinecone, FAISS, n8n, and Zapier * Designing databases using SQL Server, MySQL, PostgreSQL, MongoDB, Redis, and Elasticsearch * Deploying applications to Azure and AWS * Leading teams and reviewing architecture, code quality, and technical decisions CORE SKILLS Backend: C#, .NET, ASP.NET Core, ASP.NET MVC, Web API, Node.js, PHP, Python Frontend: Angular, React, Next.js, TypeScript, JavaScript, HTML5, CSS3 Databases: SQL Server, MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch Cloud & DevOps: Azure, AWS, GitHub Actions, GitLab CI/CD, Jenkins, Azure DevOps, AWS CodePipeline AI & Automation: OpenAI API, Hugging Face, Pinecone, FAISS, RAG, n8n, Zapier Architecture: Microservices, REST APIs, SOLID principles, clean architecture, performance optimization WHY WORK WITH ME? * I bring both hands-on development and architecture-level thinking * I can join an existing team or independently own a project * I write clean, maintainable, scalable code * I understand business goals, not just technical tasks * I communicate clearly and keep projects moving Whether you need a new application, legacy system upgrade, AI integration, API automation, cloud deployment, or long-term technical partner, I can help you build it properly. Let’s discuss your project and find the best technical approach.