Website Speed Optimization & Feature Integration

I need a skilled developer to optimize the speed of three websites and implement some additional functionalities.

The sites are:
- https://dialabad.in/
- https://directory.dialabad.in/
- https://mallpapa.com/

Required Tasks:

Speed Optimization: Boost the loading speed of all three websites.

Feature Implementation:
- Evaluate and advise on the use of the "Digits" plugin for login.
- Set up SMS and WhatsApp notifications for contact form submissions.

Training:
- How to allow external agencies or freelancers to post listings on behalf of other users and activate those listings.
- How to backup and restore data.
- How to display featured ads from both sites on the home pages via feeds.
- Create an Admin Guide for SEO-compliant post listing.

Ideal Skills and Experience:
- Proficiency in website speed optimization.
- Experience with WordPress plugins and customizations.
- Familiarity with SMS/WhatsApp integration.
- Strong documentation and training skills.

Please provide a portfolio showcasing similar work.