Open to opportunities

Michael John

@michaeljohn1

Senior Shopify Plus developer specializing in high-performance eCommerce, API integrations, and conversion-driven storefront optimization.

Philippines

Message

What I'm looking for

I’m looking for a forward-thinking team in an agile environment where I can own Shopify builds end-to-end—shipping headless-ready storefronts, strong API integrations, and performance/CRO improvements that drive measurable revenue growth.

I’m a Senior Shopify Plus developer with over 7 years of hands-on experience building, optimizing, and scaling high-performance eCommerce platforms for global clients. I bring Shopify expertise across theme customization, custom app development, API integrations, and performance tuning to deliver seamless user experiences that boost conversion and revenue growth.

Most recently, I led end-to-end development of 15 custom Shopify stores, improving site speed and checkout conversion through Liquid optimization, JavaScript performance tuning, and selective headless implementations using Hydrogen (Remix-based). I also designed and deployed bespoke Shopify apps for inventory management and personalized product recommendations, integrating Klaviyo for email automation and Stripe for payment processing across high-volume merchant stores.

I thrive on transforming complex business requirements into scalable solutions. I migrated legacy WooCommerce and Magento sites to Shopify Plus—reducing ongoing maintenance costs by ~40%—and improved mobile responsiveness for enterprise clients. I’ve also delivered measurable SEO wins via comprehensive audits, schema markup, AMP pages, and metafield strategies.

I’m a strategic problem solver who enjoys fast-paced, agile environments. I mentor developers on Shopify GraphQL API best practices and architecture, optimize storefronts for multi-market launches (multi-currency, localization, GDPR-compliant handling), and consistently focus on performance, accessibility (WCAG 2.1 AA), and long-term maintainability.

Experience

Work history, roles, and key accomplishments

Senior Shopify Developer

WalkingCo

Apr 2023 - Jan 2026 (2 years 9 months)

Led end-to-end development of 15 custom Shopify stores, improving site speed and checkout conversion through Liquid optimization, JavaScript performance tuning, and selective headless implementation with Hydrogen. Built Shopify apps integrating Klaviyo and Stripe, migrated WooCommerce/Magento sites to Shopify Plus (cutting maintenance costs by ~40%), and improved SEO via schema markup, AMP pages,

Liquid Optimization Shopify Hydrogen Shopify Migration Shopify App Development Klaviyo Stripe

Junior Shopify Developer

StoresSpecialists, Inc.

Apr 2021 - Jul 2023 (2 years 3 months)

Customized fully responsive Shopify stores using reusable components and templates, reducing subsequent development time by ~40% and improving user experience and client satisfaction. Enhanced site search with advanced filtering to improve product discoverability, migrated legacy platforms to Shopify with minimal disruption, and implemented performance/stability fixes to minimize downtime.

Shopify Theme Customization Liquid Online Store 2.0 Enhancements Filtering Conversion Rate Optimization Performance Optimization Agile Delivery

Full Stack Developer

LocalSolvePH

Apr 2021 - Jan 2023 (1 year 9 months)

Developed and maintained 10+ enterprise Shopify themes from scratch using HTML5, CSS3 (Sass/SCSS), and vanilla JavaScript, delivering WCAG 2.1 AA compliant, responsive designs. Integrated Recharge subscriptions and product bundling, implemented Cloudflare caching and lazy-loading to achieve sub-2-second page loads, and built Shopify Online Store 2.0 custom sections/snippets that reduced content tu

HTML5 CSS3 WCAG 2.1 AA Shopify Online Store 2.0 Cloudflare Lazy Loading

Front-End Developer

Xpanse Technologies Inc.

Apr 2018 - Nov 2019 (1 year 7 months)

Customized 8 mid-sized Shopify stores using Liquid, AJAX cart updates, and CSS animations to create engaging, brand-aligned user interfaces. Integrated apps (Oberlo, Judge.me), supported custom checkout and abandoned cart recovery flows, and contributed to A/B testing to improve product page click-through rates while maintaining performance using Google PageSpeed Insights.

Liquid Shopify Theme Customization AJAX Cart Updates CSS Animations A B Testing App Integrations (Oberlo Judge.Me)Cross Browser Testing