Full-Stack Developer (MERN)

This role is ideal for a Senior Full-Stack Developer with 6+ years of experience, particularly strong in JavaScript/TypeScript and the MERN stack. Candidates should be proficient in building scalable, secure web applications, familiar with RESTful APIs, and adept in state management (Redux/MobX). Experience with AWS, Docker, and CI/CD is a plus, and readiness to work Australia shift hours onsite is required.

1. Can you explain the architecture of a typical MERN stack application?
   A MERN stack app uses MongoDB for the database, Express.js and Node.js for the backend API, and React.js for the frontend, all communicating via RESTful endpoints.

2. What are the differences between JavaScript and TypeScript, and why would you prefer TypeScript in a large-scale application?
   TypeScript introduces static typing and compile-time checks, helping catch errors early and improving code maintainability in large-scale applications.

3. How do you manage global state in a React application using Redux?
   Redux uses a central store, actions, and reducers to manage and update application state in a predictable way, enhancing scalability and debugging.

4. What are middleware functions in Express.js, and how do they enhance your backend APIs?
   Middleware functions process requests between the client and the server, handling tasks like authentication, logging, and error handling before final route handling.

5. How would you ensure security in a full-stack MERN application?
   Use HTTPS, sanitize inputs, implement authentication and authorization (e.g., JWT), and secure database connections and environment variables.

6. Describe your approach to designing and implementing RESTful APIs.
   RESTful APIs use standard HTTP methods and stateless architecture; I ensure clear endpoint naming, proper status codes, and versioning for maintainability.

7. What strategies do you use to improve frontend performance in React?
   Code splitting, lazy loading, memoization, avoiding unnecessary re-renders, and optimizing assets (images, fonts) are key strategies.

8. How do you handle form validation in React?
   I use libraries like Formik or React Hook Form combined with Yup for schema-based validation, or custom validation logic for flexibility.

9. Can you explain how Docker and Kubernetes can support your development workflow?
   Docker creates consistent environments for development and deployment, while Kubernetes orchestrates and manages containerized apps for scalability and resilience.

10. How do you conduct code reviews and mentor junior developers effectively?
    I focus on code readability, best practices, and test coverage, and provide constructive feedback while encouraging learning and knowledge sharing.

Join a dynamic tech team as a Senior Full-Stack Developer at a forward-thinking company, working with the MERN stack (MongoDB, Express.js, React.js, Node.js) on cutting-edge web applications. You'll contribute to architecture, performance, and scalability while mentoring junior devs and collaborating cross-functionally. This is a full-time, on-site role aligned with the Australia shift. Competitive salary offered, with exposure to modern tools like TypeScript, Redux, AWS, Docker, and GraphQL. If you're passionate about clean code and high-impact development, this is your chance to shine.