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🏆 .NET Developer with 20+ years of experience building scalable, high-performance web applications and backend systems. I specialize in ASP.NET Core, C#, MVC, Web API, and SQL Server to deliver robust, secure, and user-friendly solutions. 💡 Key Competencies: 🔹 Backend Development: C# | ASP.NET Core ⚡ Building scalable and secure backend systems with ASP.NET Core and C# ⚡ Developing RESTful APIs for seamless frontend-backend communication ⚡ Implementing authentication and authorization using JWT and OAuth ⚡ Middleware development for request handling and validation 🔹 Frontend Development: 📌 Creating dynamic, responsive, and interactive user interfaces with ASP.NET MVC and Razor Pages 📌 Integration with RESTful APIs and third-party libraries 📌 Responsive web design with CSS, Bootstrap, and JavaScript 📌 Building web applications with Angular, PrimeNG, TypeScript 📌 Blazor for building interactive web applications with C# 🔹 Database Management: SQL Server and PostgreSql 🌟 Designing and optimizing databases for performance and scalability 🌟 CRUD operations and complex query implementation 🌟 Data modeling and schema design for efficient data storage 🌟 Integration with Entity Framework Core, NHibernate and Dapper for streamlined database interactions 🔹 Microservices Architecture: 🌠 Using Docker for containerization and deployment 🔹 Fullstack Development: ⭐️ End-to-end development of web applications, from concept to deployment ⭐️ Seamless integration of frontend and backend systems ⭐️ Deployment on cloud platforms like Azure and AWS ⭐️ Version control with SVN, TFS, Git and collaborative workflows 🔹 Additional Skills: ✨ Testing with xUnit and Moq ✨ Agile methodologies for project management ✨ CI/CD pipelines for automated deployment ✨ Performance optimization for faster load times 💡 Why Choose Me? 🔥 Proven Expertise: Delivered 20+ .NET projects with measurable results 🔥 Scalable Solutions: Build applications that grow with your business 🔥 Client-Centric Approach: Clear communication, timely delivery, and dedicated support 🔥 Future-Proof Development: Write clean, maintainable, and well-documented code 🔥 Continuous Learning: Always updating my skills to stay ahead in the ever-evolving tech landscape 💡 Technical Stack: 📌 Backend: ASP.NET Core, C#, RESTful APIs, SignalR, Entity Framework Core 📌 Frontend: Angular, React, ASP.NET MVC, Blazor, CSS3, Bootstrap, JavaScript 📌 Database: SQL Server, PostgreSql, Entity Framework Core, other ORMs 📌 Tools: Git, Docker, xUnit, Moq 📌 Deployment: Azure 💡 Recent Projects: 🌎 Developed web system using ASP.NET Core Web API, Angular, PrimeNG, DevExtrem 🌎 Build different integrations using Azure Functions, Azure Storage, CosmosDB 🌎 Improve security with Azure Key Vault 🌎 Bug fix and implement new features for existed systems 🌎 Support and bug fix for big legacy distributed system .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 REST API Developer Upwork .NET Web API Development Upwork .NET Enterprise Application Development Upwork .NET Database Development Upwork .NET SQL Server Developer Upwork .NET Azure Developer Upwork .NET Cloud Application Development Upwork .NET Integration Developer Upwork .NET Performance Optimization Upwork .NET Maintenance and Support Upwork .NET Migration & Upgrade Services Upwork Skill Keywords# ASP.NET Developer | Blazor | Angular | ASP.NET Core MVC Developer | .NET Backend Engineer | Senior Full-Stack C# Developer | Clean Architecture in .NET | Freelance Enterprise .NET Developer | Microsoft Azure .NET Specialist | Cloud-Native .NET Engineer | .NET Dev with CI/CD Pipelines | Dockerized .NET App Developer | Finance & Insurance .NET Systems | API Development & Documentation (Swagger, Postman) | Backend Developer (.NET Core) | SQL Server Optimization & Query Tuning | Entity Framework Core + Code-First Dev | T-SQL / Stored Procedure | RESTful API Developer | Agile & Scrum-Based Project Experience | DevOps on Azure + GitHub Actions | Secure App Developer (JWT, Role-based Auth) | Localization & Globalization in .NET Apps | PDF & Excel Report Generator in .NET | Upwork Verified .NET Expert | ASP.NET Identity & Claims-Based Authorization | Automated Unit Testing with xUnit & NUnit | Azure App Service + Azure Storage + Key Vault Setup | Legacy App Modernization - .NET Framework to .NET Core

🚀 Senior .NET Developer | Acumatica ERP | React | Azure | AI Solutions I help businesses build, modernize, and scale enterprise applications, ERP systems, CRM platforms, SaaS products, and cloud solutions. With 11+ years of commercial software development experience, I have successfully delivered enterprise-grade applications from concept and architecture through deployment and long-term support. My expertise includes backend, frontend, cloud infrastructure, ERP customization, Microsoft 365 integrations, and AI-powered business solutions. Core Technologies ✔ C# ✔ .NET Framework ✔ .NET Core ✔ .NET 8 ✔ ASP.NET MVC ✔ ASP.NET Core ✔ REST API Development ✔ Entity Framework ✔ Entity Framework Core ✔ SQL Server ✔ Azure ✔ Azure DevOps ✔ Docker ✔ Microservices Frontend Development ✔ React ✔ TypeScript ✔ JavaScript ✔ DevExpress ✔ Infragistics ✔ HTML5 ✔ CSS3 ✔ Responsive UI Development Desktop Development ✔ WinForms ✔ WPF ✔ Enterprise Desktop Applications ✔ Legacy Application Modernization Acumatica ERP Expertise ✔ Acumatica ERP Customization ✔ Workflow Automation ✔ Business Events ✔ Generic Inquiries ✔ Custom DAC Development ✔ ERP Integrations ✔ Business Process Optimization Microsoft 365 & Office Development ✔ Excel Add-ins ✔ Outlook Add-ins ✔ Word Add-ins ✔ Office JavaScript API ✔ Microsoft Graph API ✔ Office 365 Integrations AI & Modern Development ✔ OpenAI API ✔ ChatGPT Integrations ✔ Claude AI ✔ GitHub Copilot ✔ OpenAI Codex ✔ Cursor AI ✔ AI Workflow Automation ✔ AI-powered Business Applications ✔ Document Processing Solutions Recent Project Experience • Enterprise CRM Systems • Acumatica ERP Customization • SaaS Platforms • Enterprise Dashboards • Legacy System Modernization • Cloud Migration Projects • Office 365 Add-ins • AI-powered Business Solutions • Database Optimization Projects • Enterprise Workflow Automation Why clients work with me: ✅ Clean and maintainable code ✅ Strong architecture and design skills ✅ Fast problem solving ✅ Excellent communication ✅ Reliable delivery ✅ Full project ownership ✅ Long-term partnership mindset Whether you need ERP customization, a modern SaaS platform, enterprise software development, AI integration, Office Add-ins, cloud migration, or modernization of an existing system, I can help deliver reliable and scalable solutions that create real business value.

🟢 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

Many companies run critical business processes using spreadsheets, disconnected tools, or legacy systems that are difficult to maintain. I help businesses replace those systems with custom role-based web applications such as CRM, ERP, and SaaS platforms that automate workflows, unify data, and scale with the company. As a Full Stack Developer and .NET Expert with 20+ years of uninterrupted commercial experience, I design and build business software that fits the real workflow of your company — not the limitations of generic tools. What usually happens before clients hire a Full Stack Developer like me • Legacy systems that are impossible to maintain or scale • Manual workflows consuming hours of team time every day • Off-the-shelf CRM or ERP tools that almost fit — but not quite • AI-generated or poorly structured codebases that need to be rebuilt properly • Developers who disappear mid-project or deliver code nobody can maintain As a Full Stack Developer and .NET Expert, I’ve solved these problems many times by rebuilding architecture, simplifying systems, and creating reliable software platforms companies can depend on. What I build as a Full Stack Developer • Custom CRM development for sales pipelines and customer management • ERP systems that unify operations, finance, and internal processes • SaaS platforms for startups and new digital products • Workflow automation to eliminate manual work • Admin panels and dashboards for internal teams • API integrations with external services • Legacy system modernization As a Full Stack Developer, I build complete systems using: C# • ASP.NET • SQL Server • PostgreSQL • REST APIs Cloud deployment on AWS and Azure What you get working with a .NET Expert • Clean and maintainable architecture • Secure backend and role-based access control • Audit trails and business-grade data security • Scalable systems designed for long-term growth Most importantly, you work directly with a Full Stack Developer who writes the code personally, manages deployment, and communicates clearly throughout the project. No vendor lock-in. White label. You fully own the code and infrastructure. If you need a custom CRM, ERP system, SaaS platform, or internal business tool, feel free to invite me to your project. I’m happy to discuss the architecture and help plan the right solution before development begins. Skills: .NET Full Stack, Web Developer, Software Architect, C#, ASP.NET, SQL Server, PostgreSQL, Frontend & Backend Development, Web development, Web developer, API integration, CRUD applications, Workflow automation, Admin dashboards, Reports & Analytics, Cloud deployment, Custom Web App, Low-Code / Rapid Application Development (.NET & Web), AI-Assisted Development Core Expertise & Technologies: CRM Development, ERP Development, Portal Development, Platform Development, System Development, Dashboard Development, Internal Tools Development, Database Development, CMS Development, Custom CRM, Custom Web Application, Web Application, Internal Tools, Business Process Automation, Integrations, Inventory/Accounting Software, MVP Development, Website Development, Fast Prototyping, Prototype Development, Rapid Application Development, From Scratch, Pilot, Initial, Early stage, Modernization, Custom Development, Not a Generic Solution, White label, No vendor lock-in, In house, Greenfield, Azure, AWS, Workflow Automation, Automation, API Integrations, Legacy, Migration, JSON API Integration, RESTful API Development, Excel Integration, Google Sheets Integration, C#/.NET, SQL, PostgreSQL, MS SQL, Security, Roles, User Roles, Notifications, Permissions, Validation, Pagination, Dashboard, Admin Panel, Administration, Admin Dashboard Builder, Web Forms, Notifications, HTML, CSS, JavaScript, B2B, B2C, Subscriptions, Stripe, Lovable, Frontend, Backend, AI, Artificial Intelligence, Authorization, Authentication, OAuth2, NoSQL, WordPress, MAUI, VB6, VBA, VB.NET, Mobile Development, Android, Algorithms, Data Structures, Engines, Copilot

Many companies don't need another developer—they need someone who can understand a complex system, identify technical risks, and build the right solution before writing thousands of lines of code. That's where I help. I'm a Software Architect and Senior .NET Engineer with 20+ years of commercial experience designing, modernizing, and scaling business-critical applications. I specialize in turning complex legacy systems into maintainable, scalable platforms while minimizing business disruption. Over the years, I've worked with startups, SMBs, and enterprise clients, helping them solve technical challenges rather than simply implementing features. What I can help you with ✔ Legacy system modernization ✔ Technical Discovery & Solution Architecture ✔ SaaS platform development ✔ ASP.NET Core / .NET 6-10 ✔ Azure Cloud Architecture ✔ System Design & Technical Leadership ✔ Performance optimization ✔ Multi-tenant applications ✔ REST APIs & Microservices ✔ Database design & optimization (SQL Server) ✔ Identity, Authentication & Authorization ✔ AI integration into existing applications Typical projects • Modernizing large legacy .NET applications • Building new SaaS products from scratch • Designing scalable cloud architectures • Technical due diligence before development starts • Recovering undocumented business logic • Refactoring complex systems • Leading development teams • Solving performance bottlenecks My technology stack • C# • .NET / ASP.NET Core • Azure • SQL Server • Entity Framework Core • Angular • React • Docker • Kubernetes (AKS) • Redis • RabbitMQ • SignalR • OpenIddict • Azure DevOps • GitHub Actions How I work I believe software development starts with understanding the business—not the technology. Before suggesting an implementation, I focus on understanding business goals, existing workflows, technical debt, and future scalability. This approach significantly reduces project risk and helps avoid expensive architectural mistakes. I'm comfortable working as: • Software Architect • Senior Full Stack .NET Developer • Technical Lead • Fractional CTO • Technical Consultant If you're looking for someone who can not only write high-quality code but also help make the right technical decisions, I'd be happy to discuss your project.

Senior .NET ASP.NET C# Full-stack developer with 8 years of experience. Since the start of my career, I’ve delivered 80+ projects across logistics, transportation, warehousing, inventory, automotive, supply chain and marketplace domains. I work with founders, product teams, and enterprises, helping companies cut development costs by up to 50% while delivering stable, production-ready software. 👨‍💻 My skills include: • Working with .NET frameworks from the very first contact: .NET, .NET Core, Node.js, NestJS, ASP.NET, ASP.NET Core, ASP.NET MVC, C#, Entity Framework, API • Full-stack development: .NET C#, ASP.NET , React, Next.js, Angular, HTML, CSS, TypeScript, Tailwind, Javascript • For databases I usually use MySQL, SQL Server, PostgreSQL, Redis, MongoDB • Cloud and deployment(DevOps) experience in : AWS, Azure, Microsoft Azure, CI/CD pipelines, Docker, Kubernetes, CI/CD. • Real time notifications and messaging: SignalR, WebSocket • Architecture & Scalability: Monolithic Architecture, Microservices, Event-Driven Systems • Security & Authentication on JWT, OAuth 2.0, Role-Based Access Control • Integrations: Payment Gateways, CRM/ERP Systems, Third-Party APIs, GPS & Tracking Services 🔍 Key Project Highlights: Transportation Management System Using .NET Framework, ASP.NET, ASP.NET MVC, React, SQL Server, Web API, SignalR, JWT, Azure developed a transportation management system supporting shipment lifecycle management, dispatch planning, vehicle allocation, driver assignments, route optimization, administrative and operational dashboards and real-time shipment tracking. Maintained Travelport Universal API integrations using C# / .NET Inventory Platform/ERP Spent years as a Lead .NET full stack developer building a comprehensive inventory ERP system for supply chain management. Real-time inventory tracking, automated order intake, stock replenishment, and delivery coordination modules with microservice integrations, Web APIs, and cloud-based infrastructure. Tech stack I used: .NET, ASP.NET Core, C#, React, Next.js, TypeScript, SQL Server, Entity Framework, and RESTful APIs. Marketplace for Car Auctions (Automotive marketplace) Built from scratch multi-tenant automotive SaaS with integration with Rapid Car Check API and Anthropic Claude AI API (calculates the purchase offer based on car details and condition) . I used a .NET-based backend with microservice architecture and SQL database integration. Key features: dealer management, vehicle listings, bidding workflows, subscriptions, payment processing, and vehicle verification services developed with ASP.NET Core, React+ Next.js, Entity Framework, RabbitMQ, and SQL Server and TypeScript. Custom tracking and monitoring App IOS/Android As a Team Lead contributed to a real-time tracking platform for monitoring field operations, assets, and vehicle movements with live GPS tracking, geolocation, task management, photo uploads, and operational reporting. Built scalable APIs, integrated Google Maps and GPS providers, implemented push notifications and offline synchronization. Tech: ASP.NET Core, Web API, React, React Native, TypeScript, SignalR, SQL Server, Azure, Google Maps API. CRM Reviewed the architecture of a multi-role CRM for a printing business. Using .NET Core, improved the system performance by 30% through database query tuning and backend refactoring. Using .NET Core, ASP.NET Core, C# developed new modules for order processing and invoicing. Key things to consider: 📎 8+ years as a web and app developer and .NET software engineer 📎 110+ clients worldwide (US, UK, EU, Middle East, Australia) 📎 50% cost reduction through AI-assisted coding (Claude Code, Codex, Cursor and Chat GPT) and proven frameworks 📎 Delivered 70+ Web platforms, SaaS products, and Mobile apps 📎 Strong focus on architecture, clarity, and long-term maintainability If you’re looking for a full-stack .NET developer, a reliable .NET engineer or someone who can grow into a long-term technical partner – I’m ready to help, click the green INVITE button, and let’s give it a try.