Re-design of Google Slide Corporate Presentation

We are looking to redesign the current presentation available here with a more professional look & feel while ensuring that the following requirements are met:
https://docs.google.com/presentation/d/1oie6N74LbHoLIIpOo3jxJQMrqTxYFEoJNmevHQ-CM9E/edit?usp=sharing

Editable: The entire presentation should be fully editable within Google Slides to allow for future updates.

Translatable: The structure and design should make it easy to translate the presentation into different languages.
Customizable: Company names, logos, and key elements must be easily replaceable to adapt to different clients or partners.

Slide Templates: The presentation should include at least 10 different slide templates that can be used for various types of content.

Optimized for file size: The images and graphics should maintain high quality but not significantly increase the overall file size.

High Quality: The design must reflect high professional standards, balancing creativity and clarity.

Platform: The final deliverable must be created in Google Slides and fully functional in that environment.

Virtuoso Look & Feel: The design should have a sleek, modern, and polished visual style, aligned with a "Virtuoso" aesthetic, conveying excellence and elegance.

Additionally, the presentation must be flexible for updates:

- App Screens: Screenshots of the app currently displayed in the presentation may need to be replaced in the near future. Ensure these elements are easily editable and replaceable.

Proposals: Before finalizing the presentation, we require at least 3 concept of design proposals for the overall look & feel.

Once a design direction is approved, we will proceed with incorporating the contents from the attached presentation into the new template.

Please list below the link of a similar project you have been working on in order to help us choose to work together!