Senior Frontend/Full-Stack Dev – EXACT Shopify Checkout Clone + Payment Gateway

Project Description

NON-NEGOTIABLE: Checkout layout/steps/field order/UX behavior must match Shopify Checkout as closely as technically possible, with Shopify-level perceived speed (fast load, instant interactions, optimized mobile). You must replicate: layout structure, step flow, validations, error states, loading states.

Build:

Checkout UI (embedded) + performance optimization (mobile-first; target Shopify-like LCP/INP/TTI).

Payments: integrate 1 provider (Adyen/Checkout.com/Nuvei/Worldpay-like). Tokenization via provider (no raw card data stored). Webhooks, retries, signatures, idempotency.

Split + retention engine: auto-retain fulfillment cost; hold/release merchant balance by rules (tracking created/delivered/time). Refunds + basic chargeback handling.

Fulfillment trigger: on approval create order, start processing, return tracking ASAP; link payment<->fulfillment states.

Admin MVP: transactions, statuses, held funds, payouts, refunds, exports.

To apply: send checkout examples, payments experience, Shopify app/embed experience, proposed stack, milestones & timeline. If you can’t do UI parity + speed parity, don’t apply. Show More

Attachments

Project BriefPDF

Skills

Frontend DevelopmentFull Stack DevelopmentHTMLJavaScriptMobile DevelopmentPayment Gateway IntegrationPHPShopifyUI / User InterfaceWeb Development

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Client Info
    • Demo USER
    • Project Summary
    • Status
      Open
    • Category
      Web Development
    • Project Type
      Fixed Price
    • Budget
      $1,500 - $2,250
    • Date Posted
      1 month ago
    • Project ID
      2776
    • Project Views
      565