Hire the Best ASP.NET Developers
in Serbia

Senior Full-Stack .NET Developer with 5+ years of experience building scalable web applications, robust APIs, and modern database architectures. My core stack includes C#, .NET Core, SQL Server, and TypeScript/Angular, alongside legacy support in VB.NET. I leverage advanced AI coding workflows to deliver high-quality, maintainable code faster, optimize complex queries, and accelerate overall project execution. Core Skills & Focus: Backend & APIs: C#, .NET, Web APIs, Entity Framework, MSSQL Frontend: Angular, TypeScript, JavaScript Efficiency & Practices: AI-assisted development, clean architecture, Git, automated testing Whether you need end-to-end web application development, legacy code refactoring, or performance optimization, I provide reliable, independent solutions tailored to your business goals. Let's discuss your project!

I’m a senior .NET backend engineer focused on building APIs, integrations, and automation-heavy systems. Over 10+ years on Upwork, I’ve delivered large-scale backend solutions with 5.0 feedback across 18K+ hours. What I build: Clean, versioned REST APIs Integrations (CRM, billing, IoT, webhooks, payment providers) High-load backend services Background workers, schedulers, messaging Secure authentication (OAuth2, JWT, RBAC) Tech: .NET 6–8, C#, EF Core, SQL Server, Azure, Docker, Redis, RabbitMQ What you get: stable, production-ready backend clear documentation fast communication reliable delivery without micromanagement If your project needs a senior engineer who can take ownership and deliver from day one — let’s talk.

🔔🔔🔔 Job success lowered just because I return money from escrow, nothing else. 🔊 Vibe Programming available 💻 Programming Languages 🟣 C# | 🔵 VB.NET | 🔴 Python | 🟡 JavaScript/TypeScript | 🟠 Node.js | 🟢 SQL /TSQL ☁ Cloud Platforms 🔹 Azure: AppService, Functions, ServiceBus, CI/CD (GitHub Actions), CosmosDB, VM 🔹 AWS: Lambda, DynamoDB, EC2 (VM) 🔹 Google Cloud: Firebase 🏗 ORM & Data Access 🟢 Entity Framework | 🔵 Dapper | 🔸 ADO.NET | 🟠 LINQ 🌐 Backend Development ✔ ASP.NET Web Forms/MVC | ✔ Web API | ✔ SignalR ✔ Blazor (Server & WebAssembly) | ✔ MAUI ✔ WCF Data Services | ✔ IdentityServer/Duende | ✔ Keycloak ✔ MediatR (CQRS & Request/Response Patterns) ✔ Node.js (Express, Fastify, NestJS, WebSockets, WebRTC) 🎨 Frontend & UI Technologies 🔹 React | React Native 🔹 AngularJS 1.5+ / Angular 2+ 🔹 jQuery | Bootstrap 3,4,5 | Material Design 🔹 WebRTC (Real-time Audio/Video Communication) 📱 Mobile & Hybrid Development 🔹 Ionic | NativeScript | Xamarin | MAUI | React Native 🖥 Desktop Development 🔹 WPF | WinForms | UWP | MAUI 🗄 Database & Data Storage 🔹 Relational Databases: MS SQL Server (2000 - 2016) | PostgreSQL | SQLite | Oracle (9i, 10i, 11i) | MS Access | MySQL 🔹 NoSQL & Vector Databases: MongoDB | RavenDB | Firebase Firestore Elasticsearch (Full-text search) | Qdrant | Pinecone (Vector Search & AI-based Retrieval) 🏢 Operating Systems 💠 Windows | 💠 Unix/Linux 🚀 Frameworks & Architecture 🔹 .NET Framework 2.0 - 4.8 | .NET Core 3+ 🔹 Blazor (Server & WebAssembly) | MAUI 🔹 Node.js (Express, Fastify, NestJS) 🔹 IdentityServer/Duende, Keycloak 🔹 MediatR (CQRS, Request/Response & Notification Handlers) 🔹 UnitOfWork & Repository Pattern 🔹 Async/Parallel Execution 🤖 AI & Machine Learning 🟠 OpenAI (GPT, Codex, DALL·E, etc.) 🟣 Ollama (Fine-tuning & RAG) 🟢 ML.NET (Machine Learning for .NET) 🔵 ONNX Runtime (Optimized AI Model Inference for .NET) 🔥 Why Work With Me? ✅ Over 15 years of hands-on experience in multi-tier development, relational databases and business applications. ✅ Extensive experience in HR, GIS, Medical, Real Estate, GPS Tracking, Ecommerce and Commercial Software Development. ✅ Strong expertise in web applications, including REST/OData, GraphQL, SOAP/XML services. ✅ Advanced database design skills, including complex SQL queries, stored procedures and performance tuning. ✅ Strong network administration background (MCSA Certified). ✅ Excellent analytical skills, adaptable to evolving technical environments. ✅ Proficient in front-end, back-end, cloud, AI, real-time communication (WebRTC) and DevOps, ensuring end-to-end software development expertise. 📩 Let’s Connect! 🚀 Looking for a reliable full-stack .NET & Node.js developer to elevate your business? Let's talk!

Welcome, I am Szabolcs, from Serbia, Europe. With over 23+ years of experience in software development, digital graphic design, cybersecurity expert I bring a wealth of knowledge, skill, and dedication to every project. My passion lies in delivering high-quality results tailored to meet your unique needs. Whether it’s a small or an enterprise project, I take pride in providing solutions that drive success. WHY WORK WITH ME? ✔ 23+ Years of Experience ✔ 3700+ Successful Projects ✔ 1300+ Returning Customers ✔ 99% Client Satisfaction MY AREAS OF EXPERTIZE INCLUDE: ✔ Software Development • Web Development - Websites, Web Shops, Landing Pages, ERP/CRM Web Applications, Custom Solutions, WordPress Websites & Custom WP Plugins • Desktop Application Development - Only for Windows OS • Database Development - Microsoft SQL Server, MySQL, MS Access • Microsoft Office Automation - MS Word, MS Excel, MS PowerPoint, MS Access ✔ Digital Graphic Design • Branding & Identity - Logo Design, Business Cards & Stationery, Brand Guidelines & Style Sheets • Marketing & Advertising - Social Media Graphics, Posters & Flyers, Banner Ads & Promotional Materials • Web & UI/UX Design - Website Layouts & Mockups, Mobile App Interfaces, Icon & Button Design • Digital Illustrations & Artwork - Concept Art & Character Design, Vector Illustrations, Infographics • Print & Editorial Design - Magazine & Book Covers, Brochures & Catalogs, Packaging & Label Design ✔ Cybersecurity • Network Security - Firewall & Intrusion Detection Systems (IDS/IPS), Virtual Private Networks (VPNs), Secure Network Architecture Application Security - Application Security, Application Security, Application Security • Endpoint Security - Antivirus & Malware Protection, Mobile Device & IoT Security, Patch Management & Vulnerability Scanning • Identity & Access Management (IAM) - Multi-Factor Authentication (MFA), Privileged Access, Management (PAM), Single Sign-On (SSO) • Penetration Testing & Ethical Hacking - Red Team vs. Blue Team Operations, Vulnerability Assessment & Exploitation, Social Engineering & Phishing Defense ✔ Other Various Services TECHNOLOGIES I SPECIALIZE IN: ✔ C#, VB.NET, PHP, ASP.NET , VBA, C++ ✔ Microsoft SQL Server, MySQL, MS Access, ✔ WordPress, Angular, jQuery, JavaScript ✔ HTML5, CSS3 ✔ DIVI, Avada, Laravel ✔ Adobe Photoshop, Adobe Illustrator, Adobe Premier, CorelDRAW, Canva MY SOFT SKILLS: I’m a dedicated, hard-working, and highly motivated professional with extensive knowledge and excellent problem-solving skills. As a team player, I bring focus and efficiency to every project I handle. I’m committed to delivering results that exceed expectations, and I encourage you to check out my reviews and portfolio to see the quality of my work. I value clear communication, reliability, and efficiency—ensuring a smooth collaboration from start to finish. If you’re looking for someone with deep industry insight and a commitment to excellence, let's connect and create something outstanding together! Best regards, Szabolcs Benkő