shopify site editing

I am looking for a Shopify expert to help me customize a few specific product pages on my site. I trust your judgement when it comes to the look and feel of these pages, so no need for examples. Here are the details:
need work done immediately

Specific edits needed:
- Product page customization

Requirements:
- Experience with Shopify
- Strong design skills
- Familiarity with optimizing the checkout process

Please provide examples of previous work and let me know your estimated timeframe for completion. Thank you!