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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

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.

I am a .NET full stack developer and software architect with 8+ years of experience building scalable web applications using ASP.NET Core, Angular, C#, TypeScript, Microsoft SQL Server, Azure, and modern cloud technologies. Across 35+ projects in defence, renewable energy, fintech, e-commerce, and enterprise SaaS development I have delivered systems that handle real production load, not just demo traffic. What I build as a .NET full stack developer My deepest work is in ASP.NET Core back-end development. I spent years as the lead .NET full stack developer on a platform managing thousands of wind and solar energy installations globally, processing massive volumes of real-time data, building microservices on .NET Core and Azure, and reducing critical downtime incidents by over 40% through improved monitoring and analytics. On another project I built a Loan Origination System in ASP.NET Core that automated the entire loan lifecycle from lead capture to loan issuance, integrating with HubSpot, external CRMs, and RESTful APIs on Microsoft Azure. The client went from manual processing to a fully automated fintech pipeline handling 550+ active applications, cutting processing time by 60%. ASP.NET developer work across enterprise and defence Some of my most complex work as an ASP.NET developer has been in defence and industrial sectors. I modernized a legacy web platform for a company managing 36 high-uptime naval fleet assets, warships that cannot afford downtime. The ASP.NET MVC rebuild reduced manual reporting time by 70% and enabled real-time asset tracking, secure document storage, and streamlined access to sensitive operational data. On another engagement I took over a large workplace management SaaS development project built by a single developer who had left, no documentation, weekly outages, daily hotfixes. I stabilized the ASP.NET Core back-end, eliminated the performance bottlenecks, and reduced unplanned incidents from weekly to zero within two months. ASP.NET Zero and enterprise acceleration ASP.NET Zero is my go-to when enterprise clients need multi-tenancy, role-based permissions, and audit logging without spending the first three sprints on boilerplate. I have used it to accelerate SaaS development on projects in pharma automation, workplace management software, and industrial IoT, cutting initial setup time by 3+ weeks and letting the team focus on actual business logic from day one. On average my clients ship their first production release 30% faster on ASP.NET Zero compared to building from scratch. Full-stack web development across the whole system As a .NET full stack developer I own the entire delivery, ASP.NET Core back-end, Angular or React front-end with clean web design, Microsoft SQL Server and PostgreSQL database design, and Azure infrastructure. I built a Shopify fulfillment tool in ASP.NET Core and React that reduced packing mistakes to zero and cut order processing time by 35%, integrating barcode scanning, inventory management, and connections to 8+ shipping providers. I delivered a fleet management system in .NET Core and Angular handling 1,250+ assets and 845 active rentals simultaneously, with automated reporting that saved operations teams 10+ hours per week. On the front end I work with Angular, React, TypeScript, JavaScript, Next.js, HTML, CSS, Bootstrap, and RESTful API integration, connecting them cleanly to .NET back-ends without creating maintenance nightmares six months later. C# and .NET developer engineering that goes deep Back-end development across 8 years as a .NET developer means I have seen what breaks under real load. I cut a US e-commerce platform's page load time from 8 seconds to 2, directly contributing to a 2x increase in sales. I optimize Microsoft SQL Server and PostgreSQL queries, regularly reducing query execution times by 60-80%, design database schemas that support complex reporting, and build API integration layers connecting .NET systems to CRMs, ERPs, payment gateways, and third-party platforms. I work with Node.js for event-driven services, TypeScript to keep large codebases maintainable, and Python or PHP when projects need scripting layers alongside the core .NET stack. For web development infrastructure I use Microsoft Azure and Amazon Web Services, Docker containers, microservices architecture, and CI/CD pipelines that reduced deployment time by 50% for several enterprise clients. Why clients come back I have worked with clients in Germany, the USA, Australia, the UK, Norway, Denmark, and the Netherlands across renewable energy, defence, fintech, e-commerce, and industrial IoT. What stays the same: I ask the right questions before writing the first line of code, flag problems early, and deliver .NET full stack applications that work in production, not just in development. If you are scaling a SaaS product, modernizing a legacy system, or need a .NET full stack developer your team can build on, let us talk.

😊 11+ years of commercial experience as Software Engineer 💻 I have a reliable team that is helping me to fill any role that is needed on a project. Any level of expertise, any budget, under my supervision SKILLS: ASP.NET & C# - 11+ years with ASP.NET MVC, ASP.NET Core, Web API, .NET Framework, .NET Core, Entity Framework Full-Stack - C#/.NET backend + Angular (2 yr), React/Redux (2 yr), jQuery (4 yr). TypeScript, JavaScript, HTML, CSS, SASS/SCSS, NgRx, Angular Material Databases -- SQL Server, MySQL, PostgreSQL, CosmosDB, Redis, MongoDB. Performance tuning, stored procedures, index optimization, database structure design Cloud & DevOps -- Azure (3 yr), AWS (1 yr), GCP (1 yr), Docker, Kubernetes, CI/CD, Azure DevOps, Bamboo, PowerShell Architecture -- Monolithic (6 yr) and Microservices (3 yr). Distributed transactions with MassTransit, RabbitMQ, database-per-service, shared database Leadership -- Scrum ceremonies, code reviews, sprint planning, backlog management, team performance evaluation Real-Time -- SignalR, WebSocket, ServiceBus for live notifications and messaging Security & Quality -- OAuth 2.0, JWT, Fortify scanning, penetration testing remediation, performance/load/stress testing Monitoring -- DataDog dashboards, AppDynamics, production metrics and performance reports PROJECTS: 1. Business Management Platform (2025 - present) Multi-location businesses and franchises: workforce scheduling, hiring, onboarding, task automation, compliance, maintenance scheduling, inventory control, analytics. Built real-time messaging with auto-scaling, hysteresis in caching, message reactions, SignalR broadcasting. Employee time clock. Advanced schedule configuration. Team: 5 devs, 1 PM. Tech: .NET Framework, .NET Core, ASP.NET MVC, SQL Server, CosmosDB, Azure, jQuery, Redis, SignalR 2. Commodity Trading Portal (2023 - 2024) -- Technical Lead SPA for South American commodity trading. Designed architecture, verified with solution architects. Wrote technical design documents and database diagrams. Managed development plan months ahead. Reviewed all PRs. Aligned cross-team dependencies. Set up MassTransit for distributed transactions across multiple databases. Built microservice for business contracts with South America-specific requirements. Team: 1 SA, 4 Full-Stack, 1 FE, 3 BAs. Tech: Angular, NgRx, TypeScript, OAuth 2.0, JWT, Docker, Azure DevOps, MassTransit 3. Healthcare Portal (2023) -- Team Lead Medical professionals: profiles, job applications, licence confirmation, patient history tracking. Improved legacy app performance by 30-80%. Built DataDog dashboards. SQL performance tuning. Fortify security scanning. Automated deployments. Identified root causes of inconsistently reproducible issues. Team: 2 TLs, 3 devs, 2 QA, 1 DBA, 1 PM, 1 SA. Tech: SQL Server, DataDog, AppDynamics, PowerShell, Fortify, Bamboo 4. Enterprise Feedback System (2022 - 2023) Built from scratch in 1 year, on time. Employee feedback: drafts, tags, aspects, receivers. Microservice architecture with shared database. Complex filtering and data warehouse reports. Performance/load/stress tests. Database index tuning. Migration tools. CRUD and filtering APIs. Penetration testing fixes. Private NuGet feed. Team: 1 TL, 3 BE, 2 FE, 1 PO, 1 BA, 3 QA, 1 DevOps, 1 SA 5. Warehouse Logistics (2019 - 2022) -- Team Lead Role-based portals: truck drivers tracking load/offload, dispatchers assigning docks, analytics. Business trips to Canada for on-site client work and production support. Managed front-end team. On-call support (red phone). Linux server management. High-performance SQL. Background workers. RabbitMQ queues. ML dataset preparation. Installed hardware on warehouse trucks for movement tracking. Team: multiple devs, 3 QA, 1 SA, 1 PM. Tech: ASP.NET MVC, Web API, React, Redux, jQuery, RabbitMQ, SQL Server 6. Social Network for Car Drivers (2017 - 2019) Posts, comments, likes, private messages, groups, organisations. User wall (Facebook-like), image/video upload and processing, real-time notifications with SignalR, ServiceBus jobs. Team: 6 devs, 1 PM, 2 QA. Tech: ASP.NET MVC, jQuery, SignalR, ServiceBus DOMAINS: Social networking, warehouse logistics/supply chain, healthcare, commodity trading, employee feedback/HR, business management/franchises, government compliance, asset/operational management CERTIFICATIONS: Azure Fundamentals, MCSD App Builder, MCSA Web Applications, Exam 487 (Azure/Web Services), Exam 486 (ASP.NET MVC), Exam 480 (HTML5/JS/CSS3) EDUCATION: Master's in Business Administration -- Ivano-Frankivsk National Technical University of Oil and Gas Have a 3+ years working with Angular and as a Full Stack Developer - Blazor Developer - .NET MAUI Developer Additionally to development, I am also a Business Manager in our team

🏆 .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

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.