Project
High-Performance Vanilla JS Engine
A custom JavaScript engine powering campaign execution for Tier-1 retailers like Nike and Reebok across North America.
Overview
Architected and maintained a high-performance Vanilla JS engine used by Fortune 500 retailers to execute marketing campaigns. The engine handles dynamic product recommendations, social proofing, badging systems, and real-time analytics — all while maintaining zero-latency execution during high-revenue sales events.
Key Features
- Dynamic product recommendation injection
- Social proof notifications (recent purchases, low stock alerts)
- Badging system for promotions and discounts
- Real-time analytics tracking
- Support for complex campaign types
Performance
The engine was optimized to execute within browser's requestAnimationFrame cycle, ensuring no layout thrashing or jank. Achieved zero-latency execution during Black Friday and Cyber Monday events for Nike and Reebok.
Impact
Drove millions in revenue through optimized campaign delivery. The engine serves as the primary campaign execution layer for multiple Tier-1 retailers across North America.