Shopify App

I need someone to help me in develoing a shopify app I have in mind.

The ideal freelancer for this project should have:
- Extensive experience in Shopify app development.
- Proven expertise in creating customer engagement tools.
- Strong understanding of loyalty programs and email marketing systems.
- Ability to develop a user-friendly interface and seamless performance across all devices.

Please include samples of relevant past work in your bid.