Custom WooCommerce Store & Scalable Payment Integration
Live Build
Working System & Interface Capture
Topology
System Schematic & Architecture
Redis Session Lock · Optimistic Inventory Reservation
Zero oversell race conditionStripe & Razorpay Async Handlers
SHA-256 HMAC Signature VerifiedAsynchronous Order Queue & Automated Invoicing
Transactional Email TriggerOverview
Architected and deployed a custom e-commerce solution for a retail consumer brand. Focused on frictionless mobile checkout, automated inventory sync, and localized payment gateway integration.
The Problem
The client experienced significant checkout friction on their default multi-step checkout and suffered from server latency spikes during high traffic periods.
The Solution
Redesigned the entire purchase funnel into a high-speed single-page AJAX checkout, offloaded sessions to Redis, and integrated webhooks for instant order confirmation and WhatsApp dispatch updates.
Key Features
Engineering Obstacles
Challenges Overcome
Synchronizing inventory states across concurrent checkouts to prevent overselling.
Ensuring compliance with PCI-DSS guidelines by preventing payment data touching the server.
Verification & Impact
Results & Verification
Streamlined single-page checkout flow with automatic address autofill and instant validation.
Faster page responses after introducing Redis object caching.
Automated webhook reconciliation across Razorpay and UPI.