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I am a Shopify theme and app developer with 7 years of experience as a results-driven Shopify Developer, I specialize in both frontend and backend eCommerce solutions. - Shopify Development: Expertise in Shopify Liquid and API for custom applications, including Checkout and Discount extensions. - Frontend Skills: Proficient in HTML, CSS, JavaScript, and familiar with frameworks like ReactJS and VueJS. - Backend Development: Experienced in Node.js and Express, knowledgeable in RESTful APIs. - Database Management: Proficient with Firebase, MongoDB, and MySQL. - API Integrations: Skilled in integrating third-party services to enhance functionality.…I am a Shopify theme and app developer with 7 years of experience as a results-driven Shopify Developer, I specialize in both frontend and backend eCommerce solutions. - Shopify Development: Expertise in Shopify Liquid and API for custom applications, including Checkout and Discount extensions. - Frontend Skills: Proficient in HTML, CSS, JavaScript, and familiar with frameworks like ReactJS and VueJS. - Backend Development: Experienced in Node.js and Express, knowledgeable in RESTful APIs. - Database Management: Proficient with Firebase, MongoDB, and MySQL. - API Integrations: Skilled in integrating third-party services to enhance functionality.

Takumi Saito

Full Stack Developer, Web Developer, Front-End Developer, +3

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I am a Shopify theme and app developer with 7 years of experience as a results-driven Shopify Developer, I specialize in both frontend and backend eCommerce solutions. - Shopify Development: Expertise in Shopify Liquid and API for custom applications, including Checkout and Discount extensions. - Frontend Skills: Proficient in HTML, CSS, JavaScript, and familiar with frameworks like ReactJS and VueJS. - Backend Development: Experienced in Node.js and Express, knowledgeable in RESTful APIs. - Database Management: Proficient with Firebase, MongoDB, and MySQL. - API Integrations: Skilled in integrating third-party services to enhance functionality.…I am a Shopify theme and app developer with 7 years of experience as a results-driven Shopify Developer, I specialize in both frontend and backend eCommerce solutions. - Shopify Development: Expertise in Shopify Liquid and API for custom applications, including Checkout and Discount extensions. - Frontend Skills: Proficient in HTML, CSS, JavaScript, and familiar with frameworks like ReactJS and VueJS. - Backend Development: Experienced in Node.js and Express, knowledgeable in RESTful APIs. - Database Management: Proficient with Firebase, MongoDB, and MySQL. - API Integrations: Skilled in integrating third-party services to enhance functionality.

Available to hire

I am a Shopify theme and app developer with 7 years of experience as a results-driven Shopify Developer, I specialize in both frontend and backend eCommerce solutions.

Shopify Development: Expertise in Shopify Liquid and API for custom applications, including Checkout and Discount extensions.
Frontend Skills: Proficient in HTML, CSS, JavaScript, and familiar with frameworks like ReactJS and VueJS.
Backend Development: Experienced in Node.js and Express, knowledgeable in RESTful APIs.
Database Management: Proficient with Firebase, MongoDB, and MySQL.
API Integrations: Skilled in integrating third-party services to enhance functionality.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Japanese

Fluent

English

Advanced

Work Experience

Senior Shopify App Developer at 100x Elevate

May 1, 2025 - Present

Led development and customization of Shopify apps using Laravel (PHP) and React; delivered admin workflows and subscription/membership tooling with Polaris and App Bridge; implemented Shopify webhooks and checkout extensions; built churn-offer functionalities and tracking; integrated with payment services and third-party APIs; launched Customer Accounts 2.0 extensions.

Senior Shopify Developer at Sweans

December 1, 2022 - April 1, 2025

Implemented Shopify apps using Shopify Liquid and GraphQL; developed checkout extensions; integrated features into the buyer journey; created admin dashboards and onboarding flows guided by client feedback; improved site performance and reliability.

Junior Shopify Developer at Sweans

February 1, 2019 - October 1, 2022

Developed responsive Shopify themes using HTML, CSS, and JavaScript; ensured cross-browser compatibility and mobile optimization; contributed to a ~90% increase in site performance through efficient theme customization and coding practices.

Senior Shopify Developer at 100x Elevate

December 1, 2022 - April 1, 2025

Led development and customization of highly responsive Shopify themes using Shopify Liquid. Developed advanced Shopify apps leveraging GraphQL for efficient querying and data management. Implemented mobile-first layouts, RESTful API integrations with third-party payment services, and admin workflows. Built revenue-driving components including product upsell and checkout extensions, and iterated based on merchant feedback.

Senior Shopify App Developer at Subscribify

May 1, 2025 - Present

Built and maintained a Shopify subscription/membership app using Laravel (PHP) + React, delivering onboarding flows with Polaris / App Bridge. Implemented Shopify web hook pipelines for subscription lifecycle events, enabling reliable processing and data synchronization. Delivered churn-offer functionality end-to-end and product upsell components, collaborating with product/support and iterating on merchant feedback.