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Need a backend, full-stack, or AI system that holds up in production, not just on a demo branch? That's what I do. I'm a senior software engineer with 6+ years building web apps, desktop products, data platforms, and enterprise integrations for clients in the US, Canada, and Europe. Clients usually come to me with one of these problems: - "Our API is slow or falls over under load." I profile it, fix the queries and caching, and add retries, idempotency, and monitoring so failures stop reaching your users. - "We need a real product, not a prototype." Secure auth, roles and permissions, billing, background jobs, licensing, automated tests, and CI/CD are part of the build, not a phase two. - "We want AI over our own documents but it keeps answering wrong." I build RAG pipelines with hybrid search, reranking, and measured retrieval quality so answers are traceable. - "Our legacy mainframe code needs to run somewhere modern." I deploy and repair COBOL/CICS/DB2/JCL systems on z/OS and IBM Cloud. WHAT I WORK WITH Backend: .NET Core, Python, FastAPI, Node.js, REST APIs, Clean Architecture, CQRS, Kafka, MassTransit, SignalR, Hangfire Frontend: Angular, React, Next.js, TypeScript, RxJS, NgRx, Tailwind, Material UI Data: PostgreSQL, SQL Server, MongoDB, Redis, Qdrant, pgvector AI: RAG, LangChain, OpenAI, Cohere, hybrid vector + BM25 search, reranking, evaluation Cloud and DevOps: AWS, Azure, IBM Cloud, Docker, GitHub Actions, Azure DevOps, xUnit, pytest Mainframe: z/OS, COBOL, CICS, DB2, VSAM, JCL WHAT I'VE DELIVERED - A multi-tenant vendor risk platform covering supplier onboarding through audits and remediation, with enterprise SSO, granular permissions, Stripe billing, and AWS deployment. - Three years on a freight-forwarding ERP: 1,000+ endpoints, 25+ carrier and accounting integrations, and the full rate-to-shipment lifecycle. - A licensed Windows and macOS desktop product with signed entitlements, offline grace periods, and crash-recovery testing. - A multilingual vehicle-manual chatbot with intent classification and an automated retrieval-evaluation harness. - Technical leadership of a 6-developer team across architecture, estimation, and releases. HOW I WORK I plan carefully before writing code, clarify anything that is unclear, and provide an honest estimate before development begins. I will also tell you early if an approach is risky or unlikely to work. You will receive working increments that you can review throughout the project - not a month of silence followed by unexpected results. I always take ownership of project and meet the deadline I commit to. I have maintained a 100% Job Success Score and delivered more than 2,400 hours of work on Upwork. Some of my project details are in my portfolio and work history below. Send me your requirements, and I will reply with a clear technical approach, the main trade-offs, and a realistic delivery timeline.

Greetings! If you want to create a website or make changes in an existing ASP.NET MVC website, then you are in the right place. I'm expert and well trained ASP.NET MVC developer and can help you. I can build virtually anything you may need. My 8-year web development experience includes a wide range of different solutions: from one-page websites to complex data-oriented applications. My main working technologies and frameworks: ASP.NET MVC, C#, JQuery, Bootstrap, AngularJS, Entity Framework, MS SQL Server. Key principles of my work: 🗹 Communication. I know how important it is, and I am always in touch with you. 🗹 Insight. I consider your project as my own and try to improve it, make suggestions and enhancements. 🗹 Quality. A key to the success of your project and my main area of expertise. I make ONLY high-quality websites and web application. Also, I have a good background of Windows software development (using C#, .NET, WinForms), so please feel free to send me a word if you need one. The following are some of the services with which I can help you: Here are my skill: 🗹 .NET & .NET MVC 🗹 .NET CORE 🗹 ASP.NET 🗹 CRYSTAL REPORT 🗹 RDLC 🗹 SQL SERVER 🗹 MY SQL 🗹 REACT 🗹 JQUERY 🗹 JAVASCRIPT 🗹 ANGULAR Why Me? 🗹 Can work with USA, Canadian and Australian local official time. 🗹 Available on skype, email and phone. 🗹 Well-organized and efficient. 🗹 Strong background in all phases of network and support. 🗹 Self-motivated and assertive. 🗹 Quickly learn procedures and methods. 🗹 Enjoy working with people. 🗹 Efficient and courteous. 🗹 Able to work with others toward a team goal. I am waiting for you to complete your project successfully. :)

As an accomplished C# developer and programmer with over 6 years of experience, I specialize in crafting reliable, high-quality web and desktop applications that meet and exceed client expectations. My passion for technology and commitment to delivering exceptional results have driven me to excel in the world of software development, providing innovative solutions tailored to each client's unique needs. My expertise includes: - Web and desktop application development using C#, ASP.NET, .NET Core, and .NET Framework. - Database design and optimization with SQL Server, Entity Framework, and LINQ. - Front-end development with HTML, CSS, JavaScript, and modern frameworks like Angular, React, and Blazor. - Integration with APIs, third-party services, and legacy systems. - Performance optimization, troubleshooting, and code refactoring. - Agile methodologies and strong collaboration with cross-functional teams. - PEPPOL Implementation - Business Dashboard - Analytics Over the course of my career, I've had the opportunity to work on a diverse range of projects, including financial systems, content management systems, inventory management, and more. My ability to quickly grasp complex concepts and adapt to new technologies allows me to tackle challenging projects with confidence. When you choose to work with me, you'll benefit from clear communication, timely updates, and a dedicated partner who's fully invested in your project's success. My goal is to not only meet your requirements but to exceed your expectations and establish a lasting relationship built on trust and outstanding results. Let's discuss your project and how my expertise as a C# developer and programmer can help bring your vision to life!

I'm a Senior Full-Stack .NET Developer with 14+ years of experience delivering enterprise web applications, SaaS platforms, and scalable business solutions for clients across the USA, Europe, Canada, and Australia. I specialize in building secure, high-performance applications using ASP.NET Core, C#, Blazor, React, Next.js, Web API, SQL Server, PostgreSQL, Azure, and Umbraco CMS. I also have extensive experience integrating Stripe, Authorize.Net, third-party APIs, and AI-powered solutions. ##Core Expertise: * ASP.NET Core, C#, Web API, REST APIs, Entity Framework Core, LINQ,Dapper * Blazor, React.js, Next.js, JavaScript, TypeScript, JavaScript, HTML5, CSS3, Bootstrap * Umbraco CMS & DotNetNuke(DNN) * SQL Server, PostgreSQL * Microsoft Azure,Azure App Service,Azure SQL Database,Azure Communication Services * Stripe, Authorize.Net * Google APIs, Facebook APIs, Email & SMS Services,Third-party REST APIs * AI-assisted application development * GitHub, Azure DevOps ## What I can help you build ✔ Enterprise Web Applications ✔ SaaS Platforms (Multi-Tenant) ✔ ERP & CRM Systems ✔ Inventory & Order Management ✔ Property Management Systems ✔ Healthcare & Education Platforms ✔ Financial & Accounting Solutions ✔ REST APIs & Third-Party Integrations ✔ AI-powered Business Applications ✔ Legacy .NET Modernization ✔ Cloud-ready Solutions on Microsoft Azure I focus on delivering clean architecture, scalable solutions, and high-quality code that helps businesses grow. Whether you need a new SaaS platform, enterprise application, API integration, or modernization of an existing system, I'm ready to help. If you're looking for a senior developer who understands both technology and business, I'd be happy to discuss your project and help turn your ideas into reliable, scalable software.