• Developed marketplace features and seller tools for Etsy’s platform serving 90+ million active buyers using Python/Django and React/Redux.

• Built a personalized recommendation engine utilizing machine learning algorithms, increasing user engagement by 25% and improving conversion rates.

• Created real-time analytics dashboards with D3.js visualization and WebSocket data streaming, enabling sellers to monitor performance metrics and revenue trends.

• Optimized API response times by 50% through Redis caching strategies, database query optimization, and connection pooling implementation.

• Designed and implemented an A/B testing framework to validate new features, resulting in a 20% improvement in key conversion metrics.

• Contributed to Etsy’s open-source projects and participated in peer code reviews within a 1,000+ engineer distributed organization.

• Collaborated with product and design teams to translate business requirements into functional, user-centric technical solutions.