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The types of projects a Node.js developer handles can vary widely, ranging from small-scale web applications to large-scale enterprise-level systems. These projects may include APIs for mobile apps, real-time dashboards, e-commerce platforms, content management systems (CMS), microservices architectures, and more. Additionally, Node.js is often used in combination with frontend frameworks like React or AngularJS to create full-stack JavaScript applications.
Node.js developers handle various tasks and work on different types of projects. Here are some common tasks that Node.js developers typically handle:

Building Backend APIs:

Node.js developers use the runtime environment to create scalable and efficient server-side applications, building RESTful or GraphQL APIs for frontend clients (web, mobile apps).

Database Integration:

They integrate databases such as MongoDB, MySQL, PostgreSQL with their Node.js applications to store and retrieve data efficiently.

Authentication & Authorization:

Developers implement user authentication systems using libraries like Passport.js or JSON Web Tokens (JWT) to secure access control and protect API endpoints.

Handling HTTP Requests & Responses:

Node.js developers handle incoming HTTP requests from clients, process them asynchronously using frameworks like Express.js or Koa, and send back appropriate responses with necessary data.

Real-time Communication:

Using libraries like Socket.IO or WebSockets, they enable real-time bidirectional communication between clients and servers in applications requiring instant updates (chat applications, collaborative tools).

Data Processing & Manipulation:

They perform data processing tasks using JavaScript/TypeScript code within the backend application logic—manipulating received data before storing it in a database or formatting it for client consumption.

Third-Party API Integrations:

Developers integrate external services/APIs into their Node.js applications for functionalities such as payment gateways (Stripe), social media integrations (Facebook/Twitter login), geolocation services (Google Maps API), etc.

Testing Applications:

They write unit tests for individual modules/controllers/middleware functions using testing frameworks like Mocha or Jest to ensure proper functionality throughout development while following Test-Driven Development (TDD) practices when applicable.

Deployment & Scaling Infrastructure:

Developers may be responsible for deploying their Node.js applications onto cloud-based infrastructure providers such as AWS EC2 instances or containers managed by Kubernetes/Docker Swarm; setting up load balancers/proxies/cache layers to handle scaling demands imposed by increasing usage.