1. Node.js: A strong understanding of Node.js is essential since it’s the core technology for server-side development.
2. Java: A deep knowledge of JavaScript is crucial because Node.js is built on it.
3. Developers should be skilled in both front-end and back-end JavaScript development.
4. Asynchronous programming: Node.js is known for its asynchronous, non-blocking
5. I/O model. Developers should be proficient in writing asynchronous code using callbacks, Promises, or async/await.
6. Express.js (or similar frameworks): Many Node.js applications are built using web frameworks like Express.js. Familiarity with such frameworks is often necessary for building RESTful APIs and web applications.
7. Database knowledge: Experience with databases, both SQL (e.g., MySQL, PostgreSQL) and NoSQL (e.g., MongoDB), is important. The developer should be able to work with databases, design schemas, and write queries.
8. API development: Proficiency in designing and building RESTful APIs or GraphQL APIs is a common requirement for Node.js developers.
9. Version control/Git: Knowledge of Git and using version control systems is crucial for collaboration and code management.
10. Package managers: Familiarity with npm or yarn for managing dependencies and packages is essential.