Windows or web Offline software Development

I'm in the market for a skilled software developer who can transition the core functionalities of my online web application into a standalone offline software specifically for the Windows and linux platform. This project is instrumental in enhancing user accessibility and ensuring operational continuity without an internet connection.

**Core Requirements:**

- The software must facilitate robust user authentication and security measures to protect user data during offline use.
- Seamless transition between online and offline modes, especially focusing on data integrity and security when the application reconnects to the internet. Although not specified, it would be beneficial if the application could sync with cloud services upon reconnection.

**Ideal Skills and Experience:**

- Proficiency in developing Windows desktop applications.
- Strong background in implementing user authentication systems and security protocols within software applications.
- Experience with data encryption and protection methodologies, ensuring user data remains secure, especially in offline mode.
- Capability to create a user-friendly interface that aligns with the existing web application's look and feel.
- (Preferable) Knowledge in integrating offline applications with online services or cloud storage upon re-establishing an internet connection.

By creating this offline version, I aim to provide uninterrupted access for users to perform essential functions without dependency on internet connectivity. If you have the expertise in making this transition smooth and secure, I look forward to discussing this project further with you.