Shopify App Development for Catalog & Pricing Management

I am in need of a seasoned developer who can build a Shopify app focusing on Catalog and Pricing Management. This app should provide seamless functionality within the Shopify ecosystem and cater to both desktop and tablet users.

Key Features:
- Bulk Product Import/Export: The app should facilitate easy handling of large inventories.
- Dynamic Pricing Rules: A feature to implement flexible pricing strategies based on various parameters.
- Product Categorization: The app should assist in sorting products into defined categories.

Ideal Skills & Experience:
- Strong backoffice integration knowledge of Shopify
- Proficient in consuming Shopify's Catalog APIs
- Previous experience in developing Shopify apps
- Passion for e-commerce

Please share your portfolio and examples of previous Shopify apps you've developed.