A Node.js development company specializes in creating server-side applications using Node.js, a popular JavaScript runtime. Node.js is known for its scalability and efficiency, especially for real-time applications. These companies build fast, high-performance applications, such as chat applications, streaming platforms, and APIs, leveraging Node.js’s non-blocking architecture. With expertise in JavaScript, these developers ensure quick execution and handle concurrent requests effectively. Node.js is also a preferred choice for building microservices and scalable back-end systems, helping businesses build responsive and reliable applications for users across various devices.