Hire a Node.js Developer. APIs. Real-time. Scalable. - Aleksandar Kuzmanovic offers many high-quality services. Need to hire a Node.js developer? I'm Aleksandar Kuzmanovic — a full-stack developer with 12+ years of experience building backend systems with Node.js, Express.js, and TypeScript. I architect RESTful APIs, GraphQL servers, real-time systems, and microservices that scale. Key stats: 12+ Years experience, REST + GQL API expertise, Full-Stack Capability, TypeScript Type safety. Technologies: Node.js, Express.js, TypeScript, GraphQL, REST APIs, Socket.io, PostgreSQL, MongoDB, MySQL, Prisma, AWS, Docker, Jest, Vitest. Contact: aleksandarkuzmanovic02@gmail.com.
Hire a Node.js Developer.
APIs. Real-time. Scalable.
Need to hire a Node.js developer? I'm Aleksandar Kuzmanovic — a full-stack developer with 12+ years of experience building backend systems with Node.js, Express.js, and TypeScript. I architect RESTful APIs, GraphQL servers, real-time systems, and microservices that scale.
Whether you need a Node.js developer for API development, a backend engineer for a real-time system, or a full-stack developer who can build both the frontend and backend — I deliver production-grade Node.js applications with clean architecture and comprehensive testing.
Need to hire a Node.js developer? I'm Aleksandar Kuzmanovic — a full-stack developer with 12+ years of experience building backend systems with Node.js, Express.js, and TypeScript. I architect RESTful APIs, GraphQL servers, real-time systems, and microservices that scale.
Services & deliverables.
End-to-end.
RESTful API Development
Clean, versioned REST APIs with authentication, validation, error handling, rate limiting, and comprehensive Swagger/OpenAPI documentation.
GraphQL Servers
Efficient GraphQL schemas with resolvers, subscriptions, DataLoader, and type-safe code generation for frontend consumption.
Real-Time Systems
WebSocket-powered live dashboards, chat systems, collaborative editing, notifications, and event streaming with Socket.io.
Microservice Architecture
Decompose monolithic backends into scalable, independently deployable microservices with proper service boundaries and message queues.
Database Design & Integration
PostgreSQL, MongoDB, and MySQL schema design with Prisma ORM, migrations, indexing, and query optimisation for production workloads.
Authentication & Security Systems
JWT, OAuth 2.0, social login, role-based access control, rate limiting, and comprehensive security hardening for Node.js applications.
Why hire me as your Node.js developer?
RESTful API Design
Clean, versioned, well-documented REST APIs with proper error handling, authentication, rate limiting, and validation. Built with Express.js and TypeScript for reliability.
GraphQL Expertise
Efficient GraphQL schemas with resolvers, subscriptions, and DataLoader for optimal database queries. Reducing over-fetching and enabling flexible client-side data consumption.
Real-Time Systems
Socket.io integrations for live dashboards, chat systems, collaborative editing, and real-time notifications. Event-driven architecture that handles thousands of concurrent connections.
Database & Cloud Integration
PostgreSQL, MongoDB, MySQL with Prisma ORM. Deployed on AWS, Vercel, or Railway with CI/CD pipelines, environment management, and monitoring.
Microservices & API Gateway
Decompose monolithic backends into scalable microservices with proper service boundaries, message queues, and API gateway orchestration.
Authentication & Security
JWT, OAuth 2.0, session management, rate limiting, input validation, and CORS configuration. Security-first backend development that protects your users and your data.
My process.
Simple. Transparent.
API Specification & Design
We define the API contract — endpoints, data shapes, authentication requirements, error formats, and rate limits. Clear specification before any code is written.
Database Architecture
Schema design, data modelling, relationship mapping, indexing strategy, and migration setup with Prisma ORM and the selected database engine.
Backend Development
Express.js or Fastify implementation with TypeScript, middleware chain, authentication flows, business logic, and background job processing.
Testing & Security
Unit tests, integration tests, security audits, rate limiting verification, and load testing. Every endpoint is tested under realistic conditions.
Deployment & Monitoring
Docker containerisation, CI/CD pipeline, cloud deployment (AWS/Railway/Vercel), logging, error tracking, and performance monitoring setup.
Technology Stack
Why Node.js for your backend.
Node.js has become the most widely used backend runtime for modern web applications. Its event-driven, non-blocking I/O model makes it ideal for real-time applications, API servers, and high-concurrency systems. Companies like Netflix, PayPal, LinkedIn, and Uber rely on Node.js for their production infrastructure.
The primary advantage of Node.js is shared language with the frontend. When both your React frontend and Express.js backend use TypeScript, you eliminate the cognitive switching cost of working in different languages. Types can be shared across the stack, API contracts are enforced at compile time, and one developer can work across the entire application.
For API development, Node.js with Express.js provides an incredibly flexible foundation. Clean middleware chains for authentication, logging, and validation. Type-safe request handling with TypeScript. Efficient database access with Prisma ORM. And a rich ecosystem of packages for everything from email delivery to payment processing.
Real-time functionality is where Node.js truly excels. WebSocket support through Socket.io enables live dashboards, chat systems, collaborative editing, and push notifications with minimal overhead. The same server that handles HTTP requests can maintain thousands of persistent WebSocket connections simultaneously.
Aleksandar Kuzmanovic builds Node.js backends with production-grade architecture — proper error handling, structured logging, graceful shutdown, health checks, and monitoring. Whether you need a new API from scratch, a real-time system, or improvements to an existing Node.js codebase, every project is engineered for reliability and scale.
Common questions.
Clear answers.
- What does a Node.js developer do?
- A Node.js developer builds server-side applications — REST APIs, GraphQL servers, real-time apps with WebSockets, authentication, database integrations, and microservices. Used by Netflix, PayPal, LinkedIn, and NASA.
- Why should I choose Node.js for my backend?
- Node.js offers non-blocking I/O for real-time and high-concurrency systems. It shares JavaScript/TypeScript with the frontend, enabling code reuse and faster development across the full stack.
- Can Aleksandar build both frontend and backend?
- Yes. Aleksandar is a full-stack developer — React/Next.js frontends and Node.js backends. Fewer communication gaps, faster delivery, and cohesive architecture across the entire stack.
- What databases does Aleksandar work with?
- PostgreSQL, MongoDB, MySQL, and Supabase. He uses Prisma ORM for type-safe database access and designs schemas optimised for performance and scalability.
- Can Node.js handle high-traffic applications?
- Yes. Node.js's event-driven, non-blocking I/O model is designed for high concurrency. Companies like Netflix, PayPal, and LinkedIn use Node.js for their production backends. Aleksandar architects Node.js applications with clustering, caching, and load balancing for scale.
- Do you work with existing Node.js codebases?
- Yes. Aleksandar joins existing Node.js projects, refactors legacy code, improves performance, adds new API endpoints, upgrades dependencies, writes tests, and migrates JavaScript to TypeScript.
- What is the difference between Node.js and Express.js?
- Node.js is the JavaScript runtime that runs server-side code. Express.js is a web framework built on Node.js that simplifies routing, middleware, and HTTP handling. Aleksandar typically uses Express.js for REST APIs and can also build with Fastify for performance-critical applications.
Ready to start?
Send a message and I'll respond within 24 hours with a clear plan for your project.