Shopify App & Store Customizations

I need a purpose-built Shopify app, that has some custom options like Membership, as per our requirements

I expect the app to plug directly into Shopify’s Admin API, use the latest components for any embedded UI, and keep performance Shopify-Plus ready.

I will provide collaborator access, brand assets and a staging theme. Please keep your proposal focused on similar Shopify app builds, key libraries you plan to use (Node.js, Ruby, or PHP SDK, etc.) and a realistic delivery timeline broken into milestones for app MVP, theme integration and final QA.

I really need an expert who has good knowledge on Shopify App Development. Your bid can be only be read and I only respond to bids, who start bid with these words, I understood. Otherwise I won't read your bid. Sorry, I am receiving lot of automated bids, so I don't want to waste time