Ognjen – JavaScript, liquid, MySQL

Print-on-demand store with both regular on-demand products and an app that allows companies to log in to the dashboard and create employee swag stores by creating their own products.

• Handled ongoing maintenance and continuous improvements while delivering new feature development across the storefront and custom app;
• Investigated and implemented Shopify Plus–specific capabilities, including showing a custom logo when items from specific collections appear in the cart;
• Audited, debugged, and improved a custom PHP app integrated via Shopify GraphQL, updated to the latest GraphQL version;
• Built new Launch app promo pages on the Shopify store;
• Developed frontend architecture for a custom dashboard web application;
• Resolved PDP issues related to add-on naming, ordering logic, and product configuration flows;
• Proposed and implemented UX improvements to the cart page to enhance clarity and overall customer experience.

A Shopify store with designer jewelry made with thought and crafted with love.

• Implemented ADA compliance updates to improve accessibility and ensure WCAG-aligned storefront standards;
• Built new sections based on a new design for homepage and collection pages;
• Ran structured A/B tests using Intelligems to validate design and conversion hypotheses;
• Built multiple Checkout Extension apps to extend Shopify’s native checkout functionality;
• Developed a Shopify Checkout Extension app that automatically adds Shopify Protection to cart, dynamically adjusts protection pricing based on cart value, includes a checkout widget allowing customers to remove protection;
• Developed a Shopify Checkout Extension app using Cart Transform functions enabling: “X items for fixed price” bundle logic, fully configurable rules managed directly in Shopify Admin, dynamic cart price adjustments without breaking checkout integrity.

Fashion store located in NYC offering timelessly luxurious designs.

• Provided ongoing monthly maintenance and performance optimizations;
• Implemented and configured Searchspring for advanced collection filtering and search functionality, customized styling, and frontend behavior to ensure seamless theme integration;
• Migrated search experience to Fast Simon, managing implementation, configuration, and UI adjustments;
• Integrated Rise.ai account widget using their API;
• Displayed dynamic customer reward data, including remaining reward balance, available credit, and associated reward codes, ensuring secure and accurate real-time data synchronization.

One of the best-selling mobile gadgets for gamers, which brings back the old gaming feel to mobile. It features console-style analog sticks, buttons, and triggers, enabling precise control for cloud gaming and mobile apps.

• Led a team of 3 developers during the initial development phase.
• Re-architected the store’s frontend infrastructure to improve scalability and performance using a custom mini framework that allows re-usable components for the entire team to work more efficiently.
• Built custom pages and reusable sections, and implemented market-specific features based on customer location to support international growth and localized user experiences.
• Introduced a structured CSS framework, significantly improved page speed, and optimized overall maintainability.
• Migrated lifecycle marketing from Klaviyo to OneSignal to streamline push communication and reduce platform dependency using Flow and OneSignal API
• Designed and built two extension-only Shopify apps: a checkout upsell extension to upsell an app subscription product and a post-purchase quiz extension on the Thank You page to improve data capture and customer insights.