Hiroki Yamashita

Collaborated with design and marketing to increase organic traffic by 20% and search rankings by 5%, integrated CRM/payment/fulfillment apps improving workflows by 35%, and debugged checkout issues to reduce cart abandonment by up to 30%.

Designed and built Shopify apps using Node.js and React, integrated with Shopify APIs and GraphQL to improve data efficiency and reduce server load by 70%, delivering initial versions within 7 days.

Planned and executed Shopify migrations with 100% accurate field mapping and thorough testing to guarantee seamless platform transitions.

Built a custom Shopify theme with Liquid and advanced features like dynamic recommendations and filters, increasing engagement and store performance by 23% and improving analytics-driven decisions by 5%.

Improved custom checkout flows to reduce cart abandonment by 30% and collaborated on SEO and design alignment that increased organic traffic by 20% and search rankings by 5%.

Optimized meta tags and mobile-friendly design to improve search visibility by 15% and enhanced checkout (progress bar, one-click upsell, discount logic) to increase average order value by 14%.

Improved store load speed by 45% through image compression and caching, supported 5x traffic growth with modular code, and redesigned product pages to raise conversion rates by 25% in one month.

Completed a Bachelor in Computer Science at Osaka University, focusing on core computing principles and practical software development.