Shopify App Developer Needed – Bundle & Upsell App (Like Kaching / Pumper / AOV.ai)

We’re looking for an experienced Shopify App Developer to build a high-performance bundle & upsell app similar to Kaching, Pumper, and AOV.ai. The goal is to create a scalable public Shopify app that helps merchants increase conversions and boost AOV through bundles, quantity breaks, and upsells, with an easy no-code setup.

The app should include core features like fixed and mix-and-match bundles, quantity discounts, BOGO offers, frequently bought together, in-cart and post-purchase upsells, and one-click add-to-cart functionality. It should also have a fully customizable, mobile-friendly UI compatible with all themes, along with a simple merchant dashboard for creating offers, tracking revenue, conversion rates, and running A/B tests.

We expect a clean, performance-optimized build using Shopify APIs (Admin, Storefront, Checkout Extensibility) with technologies like Node.js/Remix (or similar), Polaris, App Bridge, and webhooks. Bonus if you have experience with AI recommendations, subscription upsells, or published Shopify apps. Deliverables include a complete, scalable app (private to public ready), onboarding flow, documentation, and deployment support. Budget is open, and the timeline is approximately 3–6 weeks depending on quality and scope.