shopify apps pro and modification existing website

I am looking for a Shopify apps pro who can make modifications to my existing website. I need both design and functionality changes to be made. Additionally, I would like some new functions to be added to my website.

Ideal Skills and Experience:
- Experience with Shopify apps integration
- Proficiency in both design and functionality changes
- Knowledge of inventory management apps, marketing apps, and sales apps

Budget:
- The budget for this project is not specified.