Hire the Best Node.js Developers
in Serbia

I’m a backend developer with 5+ years of experience working in a high-paced environment, focusing on building reliable data pipelines and monitoring solutions. I previously worked at a major quant firm, developing and maintaining critical infrastructure for data processing and system observability. I’ve also built a complete data pipeline and software solution for an accounting company, streamlining their workflow and automation. Now, after relocating, I’m back to freelancing and open to new projects. Expertise: ✅ Backend development with Node.js ✅ Designing and optimizing data pipelines ✅ Building scalable APIs and microservices ✅ System monitoring, alerting, and automation ✅ Database architecture (SQL & NoSQL) ✅ Cloud infrastructure & serverless solutions ✅ Frontend development with React & Vue I thrive on solving complex problems with structured, pragmatic solutions. I value clear communication, efficient execution, and delivering quality work within realistic deadlines. Let’s build something great together.

Senior Node.js & Chrome Extensions Developer | 18+ Years of Experience I specialize in building high-performance web applications, browser extensions, and automation tools. My expertise includes: - Chrome Extensions: Advanced automation, API integrations, UI enhancements - Web Applications: Scalable and efficient solutions using Node.js, React - Scrapers & Parsers: Data extraction, automation, AI-powered captcha solving - Desktop Applications: Cross-platform apps using Electron - ERP & Document Automation: Custom workflow solutions for businesses 💡 Tech stack: Node.js, Chrome Extensions, React, Electron, PostgreSQL, Selenium

🔔🔔🔔 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!

Hi, this is Nenad. 🖐 I am a Senior Full Stack Developer specializing in React, Next.js, Node.js, and TypeScript, with over 10 years of experience building scalable, high-performance web applications. My focus is on delivering modern, responsive, and user-friendly applications that are optimized for speed, maintainability, and long-term growth. 🔹 Front-End Expertise: - Advanced React.js & Next.js development (server-side rendering, static site generation, performance optimization) - TypeScript for strong, maintainable codebases - Tailwind CSS, Styled Components, and UI/UX best practices 🔹 Back-End Expertise: - Node.js, Express, and REST/GraphQL API development - Microservices architecture & cloud integration (AWS, Vercel, Firebase) - Secure authentication, database design (PostgreSQL, MongoDB, MySQL) 🔹 What I Deliver: - Clean and scalable codebases using TypeScript - High-performing React/Next.js front-ends with smooth UX - End-to-end full stack solutions for SaaS, dashboards, marketplaces, and custom web apps - Fast turnaround with professional communication I have successfully developed and maintained enterprise applications, SaaS platforms, and dynamic dashboards, always with a strong emphasis on performance, scalability, and clean architecture. If you are looking for a reliable React/Next.js and Node.js developer who can design, build, and optimize your web application from start to finish, let’s connect and discuss how I can contribute to your project.