API Client Enhancements

I'm looking for a skilled developer to enhance the API client application using React, Node.js, and related technologies. The project involves both new features and bug fixes.

Key Requirements:

New Features
- Post Collection Export & Import: Implement functionality to export and import post collections. Support nested data structures and use JSON format.
- Tabs Drag and Drop: Enable users to rearrange tabs using drag-and-drop functionality.
- Collection Subfolders: Introduce subfolders within collections for better organization.
- UI Enhancements: Improve the overall user interface for a more intuitive experience.

Bug Fixes
- Fix any bugs identified during testing.
- Ensure the application works in a restricted environment where internet access is blocked.

Ideal Skills and Experience
- Proficiency in React and Node.js
- Experience with API integration
- Strong understanding of JSON and data structures
- UI/UX design skills
- Problem-solving skills for debugging and working in restricted environments

Please provide examples of similar work done and an estimated timeline for completion.