Cross-Platform Offline App Development

I'm looking for an experienced ElectronJS developer to create a cross-platform application with offline functionality.

Key Requirements:
- The app should work seamlessly across multiple operating systems.
- Users should be able to access, create, and edit text and documents while offline.
- Any changes made offline should sync automatically once the device is back online.

Ideal Skills:
- Proficiency in ElectronJS and cross-platform application development.
- Experience in implementing offline functionality and data synchronization.
- Strong background in handling text and document-based content.

Please provide examples of similar projects you've completed.