shopify app development

I am looking for a Shopify app developer who can create a custom app with the following features and requirements:

Features:
- Product customization: The app should allow customers to personalize and customize their purchases.
- Inventory management: The app should have a robust inventory management system to track and manage stock levels.
- Payment gateway integration: The app should seamlessly integrate with popular payment gateways to enable smooth transactions.

Requirements:
- Design flexibility: The app should have the ability to be customized and match the branding and aesthetic of the client's online store.
- No external API compatibility required.
- The app should be user-friendly and provide a seamless shopping experience for customers.

Ideal Skills and Experience:
- Strong Shopify app development experience with a portfolio of successful projects.
- Proficiency in Shopify Liquid, HTML, CSS, and JavaScript.
- Experience with product customization and inventory management in Shopify.
- Familiarity with payment gateway integrations in Shopify.
- Ability to create a user-friendly and visually appealing design.

If you have the necessary skills and experience to develop a high-quality and customizable Shopify app, please submit your proposal.