I'm Haruki Izumo, a Shopify Fullstack Developer with more than seven years of experience helping Shopify store owners achieve their goals by delivering on-time, high-quality work. I specialize in Shopify app development, theme customization, performance optimization, CRO, SEO, UX enhancements, and reliable bug fixes. I take full responsibility for my actions and strive to deliver the best possible results from my work. I enjoy leading full-stack projects, collaborating across teams, and turning business problems into scalable storefronts and apps using React, Vue, Node, Ruby, PHP, GraphQL, and Polaris. I value thoughtful design, testing, and clear communication, and I’m always learning to bring the best possible results to Shopify clients.

Haruki Izumo

I'm Haruki Izumo, a Shopify Fullstack Developer with more than seven years of experience helping Shopify store owners achieve their goals by delivering on-time, high-quality work. I specialize in Shopify app development, theme customization, performance optimization, CRO, SEO, UX enhancements, and reliable bug fixes. I take full responsibility for my actions and strive to deliver the best possible results from my work. I enjoy leading full-stack projects, collaborating across teams, and turning business problems into scalable storefronts and apps using React, Vue, Node, Ruby, PHP, GraphQL, and Polaris. I value thoughtful design, testing, and clear communication, and I’m always learning to bring the best possible results to Shopify clients.

Available to hire

I’m Haruki Izumo, a Shopify Fullstack Developer with more than seven years of experience helping Shopify store owners achieve their goals by delivering on-time, high-quality work. I specialize in Shopify app development, theme customization, performance optimization, CRO, SEO, UX enhancements, and reliable bug fixes. I take full responsibility for my actions and strive to deliver the best possible results from my work.

I enjoy leading full-stack projects, collaborating across teams, and turning business problems into scalable storefronts and apps using React, Vue, Node, Ruby, PHP, GraphQL, and Polaris. I value thoughtful design, testing, and clear communication, and I’m always learning to bring the best possible results to Shopify clients.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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Language

English
Fluent

Work Experience

Shopify App Developer at UpsellPlus
May 1, 2024 - May 1, 2025
Post-purchase and PDP upsell widgets based on smart conditions; conversion tracking on upsell widgets; A/B testing
Shopify App Developer at Shopping Gives
October 1, 2022 - April 1, 2024
UI development using Polaris; Backend development using PHP; Theme app blocks; Cart Transform Shopify Function
Shopify Fullstack Developer at Classic Tees
March 1, 2021 - September 1, 2022
Theme maintenance; improve SEO, accessibility and performance; wrote Shopify Plus Scripts for line items, shipping, payments using Ruby; developed custom apps to manage coupon codes
Shopify Fullstack Developer at Vaulted Oak
June 1, 2019 - January 1, 2021
Shopify Plus theme development & customization based on Zeplin, Figma, XD, Vision Design; Custom Shopify apps using React.js, Node.js, GraphQL, MongoDB and Shopify Polaris; Shopify storefront development using Next.js, Shopify Storefront API, GraphQL; Wrote Shopify Plus Scripts for line items, shipping, payments using Ruby; Recharge Customer Portal Development

Education

B.S. in Computer Science at Iwate Prefectural University
January 11, 2030 - August 1, 2019
Coursework in C++: algorithms and problem solving; distributed apps and backend web development at Miyako Junior College
January 11, 2030 - January 26, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Retail, Professional Services