Elta MD (a highly successful powerhouse skincare brand) required elite-level technical support, reliable site reliability engineering (SRE), and complex feature development to maintain their massive operational scale. Serving as a senior contributor, I spearheaded critical feature integrations, resolved performance-degrading bugs, and enforced strict code quality standards through code reviews. The most significant technical challenge involves architecting a complex, multi-tenant B2B2C platform that connects skincare professionals directly to the DTC pipeline. These engineering initiatives have delivered massive site performance boosts and unlocked new affiliate revenue streams, while the upcoming B2B2C is positioned to scale the brand's overall sales volume.