SEO Optimization for Single Page Site

I need SEO services for my one-page landing site aimed at improving my online visibility, primarily on Google.

Key Focus Areas:
- On-Page SEO: Enhance content, optimize keywords, and refine meta tags.
- Off-Page SEO: Build high-quality backlinks and improve social signals.

Ideal Skills and Experience:
- Proven track record in SEO, particularly for single-page sites.
- Strong keyword research and content optimization skills.
- Experience in building authoritative backlinks.
- Familiarity with Google Analytics and Search Console to track progress.

Please provide a detailed plan and timeline.