1. Developing Web Applications: Design, develop, and maintain web applications using the MERN (MongoDB, Express.js, React.js, Node.js) stack. 

2. Frontend Development: Create responsive and dynamic user interfaces using React.js, ensuring a seamless user experience across various devices and screen sizes. 

3. Backend Development: Build and manage server-side logic using Node.js and Express.js, including creating RESTful APIs to handle data exchange between the frontend and backend. 

4. Database Management: Design and implement database schemas using MongoDB, perform CRUD operations, and ensure efficient data storage and retrieval. 

5. Debugging and Troubleshooting: Identify and resolve technical issues and bugs in the application, ensuring smooth functionality and performance. 

6. Collaboration: Work closely with team members, including designers, other developers, and project managers, to deliver high-quality software solutions. 

7. Documentation: Write clear and concise documentation for the codebase, APIs, and any other technical processes to facilitate future maintenance and updates. 

8. Learning and Development: Continuously improve your skills and stay updated with the latest industry trends and technologies related to the MERN stack and web development. 9

. Code Review and Testing: Participate in code reviews to maintain code quality, and write unit and integration tests to ensure the robustness and reliability of the applications.