Built complete performance marketing system for health device brand from zero to 3.5x ROAS across Tier 1 markets. Conducted scientific research, developed unique positioning, created 150+ video creatives with actors, and designed high-converting funnels (Advertorial→Landing→Upsells). Results: $30 CPA, $89 AOV, 3.5% CR, 2%+ CTR. Delivered full Shopify store, copywriting suite, attribution dashboards, and testing SOPs. Funnel profitable 2+ years. Scaled to 6-figure monthly revenue through systematic creative rotation and data-driven optimization.