CartEngine

PORTFOLIO & CASE HIGHLIGHTS

Proven solutions for
complex commerce.

Real-world eCommerce engineering across CS-Cart, Multi-Vendor, and connected enterprise systems. Case studies reflect actual production solutions delivered for clients worldwide.

Strict Client Confidentiality: Merchants trust our team with mission-critical systems and proprietary data. Case studies below describe architectural challenges and measurable outcomes with identifying client data cleared or anonymized.
Multi-Vendor · Performance

High-Concurrency Marketplace Optimization

Overhauled a 250+ merchant Multi-Vendor storefront struggling with database locks and 6+ second checkout latencies during peak shopping periods.

Outcome: 68% latency reduction, 0 database lock timeouts during holiday peak, and automated vendor split disbursements.
Implementation Details & Solution ▼

Complete architectural audit of query execution plans, Redis caching layer deployment, and refactoring of vendor order splitting logic to avoid table locking under concurrent transactions.

CS-Cart Multi-Vendor MySQL 8 Indexing Redis Cache PHP 8.2
Systems Integration · ERP

Real-time SAP Inventory & Order Pipeline

Architected an automated bidirectional sync between CS-Cart and SAP ERP covering 120,000+ SKUs across 4 regional fulfillment centers.

Outcome: 3-second stock update propagation, automated stock allocation buffers, and complete elimination of overselling incidents.
Implementation Details & Solution ▼

Engineered a resilient middleware queue pipeline listening to SAP stock changes with idempotent webhook workers and automatic retry mechanisms.

CS-Cart REST API Spring Boot Webhook Workers Queue Pipelines
Checkout · Conversion

Custom Frictionless Checkout & Stripe Add-on

Re-engineered standard CS-Cart checkout into a streamlined one-page accordian interface with native Stripe Payment Elements and localized EU methods.

Outcome: 18.4% increase in mobile checkout conversion rate with comprehensive SCA 3D-Secure error recovery states.
Implementation Details & Solution ▼

Designed a non-destructive custom add-on implementing modern payment hooks, instant client-side validation, and fallback handling for 3D Secure challenges.

Custom Add-on Stripe API Apple/Google Pay JavaScript / UX
Migration · Modernization

Legacy 4.2 to 4.17+ Zero-Downtime Upgrade

Audited and migrated a 9-year-old heavily customized CS-Cart deployment with 15 custom legacy add-ons onto modern PHP 8.2 infrastructure.

Outcome: Seamless transition with zero data or order loss, full rollback safeguard, and clean hook-based refactoring.
Implementation Details & Solution ▼

Comprehensive database diffing, deprecated hook replacement, refactoring legacy procedural code to modern object-oriented add-on standards with zero-downtime cutover.

CS-Cart 4.17+ PHP 8.2 Migration Refactoring Zero Downtime
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