I am a Full Stack .NET Developer with expertise in ASP.NET Core, Kentico Xperience, Umbraco CMS, React, Blazor, Vue.js, and SQL Server. With 15+ years of experience and 16,000+ successful Upwork hours, I build scalable, secure, and high-performance enterprise web applications and CMS solutions. I specialize in delivering complete solutions — from backend architecture and database design to CMS implementation and modern frontend development. ✅ Core Services Backend & API Development ASP.NET Core MVC / Web API development RESTful API design & third-party integrations Authentication & authorization systems Custom business logic development SQL Server database design & performance optimization CMS Development Kentico Xperience implementation & customization Umbraco CMS development, upgrades & migrations Custom modules, widgets & extensions eCommerce & marketing automation setup Enterprise integrations & performance tuning Frontend Development React.js application development Vue.js SPA development Blazor Server & Blazor WebAssembly development Component-based UI architecture API integration with modern frontend frameworks Responsive, scalable, and optimized UI solutions 🚀 Technical Stack ASP.NET Core • C# • MVC • Web API • Blazor Kentico Xperience • Umbraco CMS React • Vue.js • JavaScript SQL Server • Azure • AWS • Git • CI/CD 💡 Why Clients Work With Me ✔ Enterprise-level full stack expertise ✔ Clean architecture & scalable solutions ✔ Strong debugging & performance optimization ✔ Professional communication & reliable delivery ✔ Long-term technical partnership mindset If you're looking for a senior Full Stack .NET developer who can handle backend systems, CMS platforms, and modern frontend frameworks — let's connect and discuss your project.

⭐️ Top Rated Plus - Top 1% of talent on Upwork 🕒 5,000+ hours on Upwork ✅ 8+ years of experience ✅ 50+ projects delivered ✅ Excelling in delivering Fortune 100-scale projects 8+ years of experience as a software engineer, and have worked at both small startups and large organizations. While I'm a proficient full-stack developer, my expertise is in building scalable Applications in (.NET Core, CQRS, Azure, API Services, ASP.NET MVC C#, MS SQL Server, VB.NET, EFCore, MongoDb, JIRA, Git, RabbitMQ, QuickBooks Integration, Micro Services, BitBucket, Unit Testing and DevOps). One recent project involved migrating a large legacy ASP MVC app to ASP.NET Core SaaS app. Responsible for implementing: - ASP.NET Core app with Core Identity for authentication and authorization - I also implemented JWT Token based claims and authentication. - REST API for WordPress clients - EF Core code first with SQL server - Background service for implementing long running tasks from API requests - SignalR for notifying clients of the status of the long running tasks - Stripe integration for one off card charging, and monthly subscriptions Another large project for a financial services firm involves: - working with a UI designer to redesign the UI (Bootstrap, jQuery, CSS, JS) - next phase to redesign back end with new REST API for a new Angular client Professionally, I have B.S (Software Engineering)

Senior .NET Full Stack Developer | 12+ Years | AI-Native Engineering | 100% Job Success | Top Rated I build enterprise-grade web applications and AI-powered systems using ASP.NET Core, C#, React, Angular, and Azure. With 6,000+ hours delivered and a 100% Job Success Score across 49 projects, I bring deep expertise and proven reliability to every engagement. 🤖 AI & INTELLIGENT SYSTEMS I actively use AI development tools (Cursor, Claude Code, GitHub Copilot) to accelerate productivity and deliver faster without sacrificing code quality. I also integrate AI features directly into your product: → OpenAI API & ChatGPT integrations → LangChain agents and RAG pipelines → AI chatbots embedded in .NET/React apps → Intelligent document processing and automation → AI-assisted legacy modernization (ASP.NET → .NET 8/10) ⚙️ BACKEND & API DEVELOPMENT → ASP.NET Core | .NET 6/7/8/10 | C# | Web API → Microservices | CQRS | Mediator pattern | Event-driven architecture → Entity Framework | Dapper | SignalR → REST APIs | GraphQL | Third-party API integrations 🖥️ FRONTEND DEVELOPMENT → React | Angular | Blazor | TypeScript | Vue.js → Responsive UI/UX | Tailwind CSS | Material UI → SPA development | PWA | Component architecture ☁️ CLOUD & DEVOPS → Microsoft Azure (App Service, Functions, SQL, Blob, DevOps) → AWS (EC2, S3, Lambda) → Docker | Kubernetes | CI/CD pipelines → IIS | Windows Server | Load balancing 🗄️ DATABASE → SQL Server | PostgreSQL | MongoDB | CosmosDB | Redis 🏗️ WHAT I BUILD FOR CLIENTS → SaaS platforms and enterprise web applications → Legacy ASP.NET to .NET 8/10 modernization → AI-powered features for existing products → ERP, CRM, WMS, HRIS, and e-commerce systems → Real-time dashboards with SignalR → Workflow automation and n8n integrations ✅ WHY CLIENTS CHOOSE ME ✔ 100% Job Success Score across 49 completed projects ✔ Top Rated Upwork's highest recognition ✔ AI-Native developer using Cursor, Claude Code & Copilot daily ✔ 12+ years with ASP.NET Core, C#, .NET ecosystem ✔ Fast delivery & clear communication (avg. response under 4 hrs) ✔ Full-time availability, 30+ hrs/week If you need an AI-augmented .NET expert who delivers fast, writes clean scalable code, and communicates clearly send me an invite. I am available now and ready to start.

Most developers write code. I build systems that don’t break when your business grows. I help businesses build scalable SaaS applications and multi-tenant systems using ASP.NET Core — designed for performance, security, and long-term stability. When your .NET project needs to work — and keep working — I’m the developer you bring in. With 10+ years of experience in the Microsoft ecosystem, I specialize in designing and building complex systems where architecture matters as much as code. My core expertise: Multi-tenant SaaS applications (secure tenant isolation, scalable architecture) ERP / LMS / business management systems Custom authentication & role-based authorization systems ASP.NET Core migrations and performance optimization I build: Scalable web apps using ASP.NET Core, Blazor, and MVC Secure REST APIs and third-party integrations Cloud-ready applications with clean architecture Full-stack solutions when needed (Blazor WASM, Blazor Server) Stack: ASP.NET Core, C#, Entity Framework, SQL Server, My Sql, PostgreSQL, Azure, AWS, Docker I’ve completed 70+ projects on Upwork with a 100% Job Success Score, mostly involving complex systems and long-term client relationships. If you’re building a serious product and need it done right — let’s talk. I’m happy to review your requirements and suggest the best approach before we start.

🟢 𝐀𝐕𝐀𝐈𝐋𝐀𝐁𝐋𝐄 NOW 👋 Hi there, I'm Artem! Need a developer to build a SaaS, MVP, or support a legacy system? I'm your full stack developer expert. With 15+ years as a Senior .NET Full Stack Developer, I plan, architect, and deliver high-performance applications that scale. Through my agency CodeLuxSolution and direct Upwork engagements, I've completed 66+ projects globally, transforming outdated systems into modern, blazor-powered solutions that drive user adoption and slash operational costs. ═══════════════════════════════════════════════════════════ 🏆 Why Our ASP.NET Core and .NET Developer Solutions Stand Out ⭐ 15+ years as a Senior .NET Full Stack Developer and Desktop Application specialist ⭐ 66+ custom projects delivered: 36 on Upwork, 30+ through enterprise contracts ⭐ Top Rated on Upwork with 100% Job Success Score ⭐ Leading projects for USA educational platforms serving 250k+ users after regulatory updates ⭐ Enterprise SaaS platforms in management and analytics spanning 20+ person teams ⭐ Desktop application migrations from WinForms to Blazor Server reducing deployment cycles to 1 second ⭐ ASP.NET WebForms to .NET Core migrations accelerating page load times by 100x (30s down to 0.5s) ⭐ High-load IoT systems optimized from 3 servers down to 1 server, cutting infrastructure costs 66% ⭐ ASP.NET MVC to RazorPages performance gains delivering 3x faster rendering ⭐ Blazor developer expertise enabling remote-first access and real-time data sync across 1000+ concurrent users ⭐ .NET Core microservices reducing deployment risk from multi-day windows to single-second updates ═══════════════════════════════════════════════════════════ 🚀 Services | ASP.NET Core and .NET Developer Expertise ▶ Enterprise SaaS Architecture - Scalable, Management and Analytics Focused ► ASP.NET Core microservices for high-load systems processing thousands of IoT requests per second ► .NET Core backend serving 250k+ users on educational platforms with zero downtime ► Blazor Server and Blazor WASM applications enabling remote access and cross-user data synchronization ► SQL Server optimization and EF Core entity mapping for complex domain logic ► Developer-led database scaling strategies reducing server footprint by 66% ▶ Legacy System Modernization - WebForms to Modern .NET ► ASP.NET WebForms to .NET Core rewrites accelerating page loads from 30s to 0.5s ► WinForms Desktop Application refactoring into Blazor Server reducing update cycles to 1 second ► ASP.NET MVC to RazorPages migration delivering 3x performance improvement ► Eliminate version conflicts across 1000+ users with web-based Blazor deployment ► .NET Framework to .NET Core infrastructure consolidation cutting infrastructure needs from 3 servers to 1 ▶ Custom Desktop Applications - WinForms and Windows Services ► WinForms application development for enterprise productivity tools ► Windows Services for background processing and system integration ► Desktop application architecture supporting offline and connected scenarios ▶ SaaS Platform Development - Full Stack from Concept to Scale ► ASP.NET Core APIs powering management and analytics SaaS dashboards ► Blazor components for real-time reporting and user collaboration ► .NET developer expertise in multi-tenant architecture and data isolation ► High-performance SaaS solutions serving thousands of concurrent users ▶ Specialized Modernization Services ► WinForms to Blazor Server conversion enabling work-from-anywhere deployment ► ASP.NET WebForms to .NET Core rewrites for systems handling high-load IoT data ► MetaTrader indicator development and NinjaTrader platform expertise ► Educational platform scaling from pilot to 250k+ user systems ► Fire safety and emergency management SaaS currently in development ═══════════════════════════════════════════════════════════ ⚙️ Workflow, Tech-Stack and Extra Value 🔍 Discovery and Requirements Analysis ► Understanding legacy system pain points and defining success metrics for migration projects ► Competitive analysis and user experience mapping for SaaS platforms 🏗️ Architecture and Design ► Mapping WinForms components to Blazor Server architecture ► Designing ASP.NET Core microservices for SaaS platforms ► Planning infrastructure consolidation strategies for high-load systems ► .NET developer best practices for scalability and maintainability 💻 Development and Integration ► C# as primary language chosen over Python for development velocity and C++ for performance parity ► ASP.NET Core | Blazor Server | Blazor WASM | RazorPages | .NET Framework legacy ► HTML5 | CSS | JavaScript | SQL Server | EF Core with advanced querying ► WinForms for Desktop applications | Windows Services | API development ► Integration with existing enterprise systems and third-party APIs ⚡ Performance Optimization ► ASP.NET WebForms to .NET Core refactoring reducing page loa

✅ 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 ✅𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐜𝐨𝐫𝐞 12+ years of professional experience Specialties: Project Management with Scrum & Extreme Programming Computer Systems Design and Architecture Programming: - .NET & .NET Core, C#, Blazor, ASP.NET MVC, ASP.NET, WebAPIs, Minimal APIs, WinForms, ADO.NET, LINQ, WCF, SOAP, etc - JavaScript (AngularJS, jQuery, KnockoutJS, ReactJs) and TypeScript, NodeJS, Ajax, HTML, CSS, JSON, DOM, XML, etc - SQL (MySQL, MS SQL) / NoSQL (MongoDB, ...), BI, Multithreading etc Next is the list of what exactly you get when you hire me: - Honest, long-term partner & friend, not just a coder (if you need just a coder for few days I am not the right choice). I will supply many ideas and suggestions you never get from the regular programmer, guaranteed! - Best Architecture & Design of your application - I will make code changes & commits from the first day you hire me. We may use Extreme Programming/Scrum, unless you prefer something else - We may carefully update your live server(s) with the latest code (Deploy) or setup new if you don't have servers yet (and yes, we will also setup continues integration & deployment). I have experience with hardware & OS software, Azure & AWS Clouds, DevOps and more! (You will see how it is possible to save $$$ every month on that, guaranteed!) - We will use best tools available to get your tasks done, your software will ship and your customers happy! * Visual Studio 2022 (or 2107 or 2015 or even 2013? maybe even VS Code) or WebStorm or IDEA? NP * Want to make Enterprise web app? Sure we can use Telerik (Kendo) / DevExpress or any other web controls. * Have already spaghetti code in ASP.NET 1.1 or 2.0? Well, we can use it for old things (upgrading very quickly to latest) and use ASP.NET MVC / ASP.NET Core for new things... * We most probably will use Github or Bitbucket as places where your code live in peace (or we can just install own Git / SVN repo on your server if you crazy about security and access), JIRA/Asana for your tasks & bugs tracking. * Need crazy attractive front-end? Sure, we will use AngularJs / React / or even Knockout. Want design for free, which still looks cool? Well, sure we will use Twitter Bootstrap (or Foundation), templates & starter kits! * Want to scale your app to the sky and make sure your clients are happy and all of them to get the best performance with minimum latency? Well, AWS, Docker, why not? I can use .Net SDK for AWS. We can use all that and much more! Please, when you hire me, we can talk every day. I Love to talk with my clients, partners & friends, not just code and hack!

Over the past 27+ years, we have developed a wide range of websites and web applications using technologies such as Classic ASP, ASP.NET MVC, C#, VB.NET, Angular, Node.js, React, jQuery, AJAX, PHP, MS Access, SQL Server, and MySQL and Mobile Application development using Flutter Development and React . Our experience includes building solutions for startups as well as small businesses and we also maintain existing Application Our core competency lies in the complete end-to-end management of new website development projects, as well as maintaining and enhancing existing applications. We specialize in working with legacy systems — whether it's customization, troubleshooting, or upgrading to modern technologies — and have extensive experience ensuring seamless transitions. In addition, we also work with open-source platforms like WordPress and other content management systems (CMS), offering tailored solutions to meet diverse business needs.

With nearly two decades of experience in enterprise software development using ASP .NET, I am a seasoned software professional. I have held various roles throughout my career, ranging from developer to solutions architect. I possess an excellent understanding of software architecture, object-oriented programming, and design principles, which allows me to confidently address complex requirements. I have been hands‑on in technical delivery, including design, coding, documentation, unit and integration testing, troubleshooting, bug fixing, and generating test plans. In addition, I have taken on leadership and mentorship responsibilities, guiding junior developers through coding standards, design patterns, and best practices to ensure quality and consistency across projects. Summary of my skills below: Backend - C#, ASP .NET (Core, MVC, Web Forms), REST API, Microservices - Azure, AWS - Entity Framework, Dapper - iText Pdf Library, Stripe Integration Frontend - Web: Angular, React, TypeScript, JavaScript, jQuery, HTML 5, CSS3, Bootstrap 5/4, Saas - Mobile: Xamarin Forms, React Native Databases - MS SQL Server, PostgreSQL, MySQL, MongoDB Third Party Controls - Telerik & Kendo UI, Dev Express, Syncfusion, Infragistics Certifications - Microsoft Certified Professional (MCTS, MCAD, MCP) - Scrum Alliance Certified Scrum Master (CSM) Let's collaborate to bring your project to life with innovative solutions that drive business success. Contact me to discuss how I can contribute to your next project!

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.

I'm a Full Stack Developer with 8+ years of experience building scalable, end-to-end web applications using .NET (C#), Angular, and React. I also bring hands-on experience in building user-friendly desktop applications using WPF, including projects that integrate AI for intelligent document review and analysis. I hold a Bachelor’s degree in Information Technology and specialize in building secure backend systems, dynamic frontends, and cloud-ready solutions. I work comfortably in both solo and team environments, and I follow Agile/Scrum workflows to ensure transparency, efficiency, and client collaboration at every step. 💻 𝗖𝗼𝗿𝗲 𝗦𝗸𝗶𝗹𝗹𝘀 & 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 💻 ✅.𝗡𝗘𝗧 & 𝗖# 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 - Deep expertise in C#, ASP.NET, and .NET Core for high-performance, enterprise-grade applications - Designing and developing robust REST APIs using Web API for seamless system communication ✅ 𝗔𝗻𝗴𝘂𝗹𝗮𝗿 & 𝗥𝗲𝗮𝗰𝘁 (𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱) - Creating dynamic, responsive, and maintainable UIs using Angular and React - Proficient in state management, component reusability, and performance tuning ✅ 𝗘𝗻𝘁𝗶𝘁𝘆 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸 & 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀 - Extensive experience with Entity Framework Core and SQL Server - Strong in designing scalable data models and writing optimized LINQ queries and transactions ✅ 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀 - Deploying and managing applications on Azure and AWS - Integrating cloud-based services and APIs to enhance functionality and reduce infrastructure complexity - Familiar with CI/CD pipelines, automated testing, and release workflows via Azure DevOps, Git, or Jenkins. ✅ 𝐀𝐈, 𝐌𝐋 & 𝐋𝐋𝐌 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 - Implementing ML models, embeddings, and vector databases - RAG pipelines for intelligent document search & summarization - Integrating OpenAI, Hugging Face, and custom ML APIs into .NET apps - AI-powered workflows for chatbots, recommendation engines, and NLP solutions ✅ 𝗔𝗴𝗶𝗹𝗲 & 𝗧𝗲𝗮𝗺 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻 - Experienced in Agile, Scrum, and Kanban development environments - Focused on delivering MVPs quickly, gathering feedback, and iterating rapidly with clear stakeholder communication. ❓𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲 - Sharp Problem-Solving: I bring a practical, analytical mindset to every challenge - Clear Communication: Transparent and professional collaboration from start to finish - Scalable Solutions: Clean, well-documented code built to evolve with your business 🧩 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜’𝘃𝗲 𝗪𝗼𝗿𝗸𝗲𝗱 𝗪𝗶𝘁𝗵 - Finance - E-Commerce - Healthcare Let’s discuss how I can help bring your product vision to life. Whether you need a long-term partner or a reliable contributor for your next sprint, I’m ready to help. Open to fixed-price and hourly projects.