Replatformed Tatcha, a Unilever brand, from SFCC to Shopify Plus with data transfer and custom function to the fullest. Improved UX with mobile-first design, image compression, and flexible layouts. Integrated Klaviyo, YOTPO, Zendesk, Shoplift, Awin, and Duel. Optimized international checkout and CMS update for better performances and scalability.