Project Overview Successfully developed and integrated a custom QIWI Payment Gateway API solution for a multi-vendor marketplace powered by WooCommerce & Dokan. The integration enables seamless, secure online payments via QIWI Wallet, bank cards (Visa, Mastercard, MIR), and phone balances, optimizing checkout conversions for international and regional shoppers.

Key Highlights & Implementation

• Custom Payment Gateway Development: Built a dedicated payment module directly integrated into WooCommerce core and Dokan multivendor settings.

• Multi-Method Support: Handled diverse payment options within QIWI Pay, including bank cards, regional payment methods (MIR), and direct wallet billing.

• Admin & Vendor Configuration: Created an intuitive admin dashboard UI for setting up Merchant ID, Merchant Site Keys, Secret Keys, and toggling Debug/Live mode.

• Smooth Checkout Experience: Embedded an interactive checkout selector with dynamic descriptions and instant feedback on order totals.

• Robust Error Handling & Logging: Integrated real-time API request logging and status callbacks to ensure secure transaction processing and debugging.

Tech Stack

• Platform: WordPress, WooCommerce, Dokan Multivendor

• Languages & APIs: PHP, JavaScript, QIWI Kassa REST API

• Security: Secure webhook/callback verification, encrypted credential handling