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Hi, I’m Julian Marcu, a senior Shopify and full-stack developer based in New York. I specialize in building scalable eCommerce solutions, crafting custom Shopify themes, developing private apps, and designing Shopify Plus architectures. I’m passionate about performance, maintainability, and conversion optimization. I focus on user-centric storefronts that deliver measurable business results, and I thrive when collaborating with cross-functional teams to deliver reliable, production-ready solutions.…Hi, I’m Julian Marcu, a senior Shopify and full-stack developer based in New York. I specialize in building scalable eCommerce solutions, crafting custom Shopify themes, developing private apps, and designing Shopify Plus architectures. I’m passionate about performance, maintainability, and conversion optimization. I focus on user-centric storefronts that deliver measurable business results, and I thrive when collaborating with cross-functional teams to deliver reliable, production-ready solutions.

Julian Marcu

Full Stack Developer, Web Developer, Front-End Developer, +4

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Hi, I’m Julian Marcu, a senior Shopify and full-stack developer based in New York. I specialize in building scalable eCommerce solutions, crafting custom Shopify themes, developing private apps, and designing Shopify Plus architectures. I’m passionate about performance, maintainability, and conversion optimization. I focus on user-centric storefronts that deliver measurable business results, and I thrive when collaborating with cross-functional teams to deliver reliable, production-ready solutions.…Hi, I’m Julian Marcu, a senior Shopify and full-stack developer based in New York. I specialize in building scalable eCommerce solutions, crafting custom Shopify themes, developing private apps, and designing Shopify Plus architectures. I’m passionate about performance, maintainability, and conversion optimization. I focus on user-centric storefronts that deliver measurable business results, and I thrive when collaborating with cross-functional teams to deliver reliable, production-ready solutions.

Available to hire

Hi, I’m Julian Marcu, a senior Shopify and full-stack developer based in New York. I specialize in building scalable eCommerce solutions, crafting custom Shopify themes, developing private apps, and designing Shopify Plus architectures.

I’m passionate about performance, maintainability, and conversion optimization. I focus on user-centric storefronts that deliver measurable business results, and I thrive when collaborating with cross-functional teams to deliver reliable, production-ready solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Full Stack Engineer - Shopify at Hewitt

January 1, 2023 - December 31, 2025

Led Shopify theme development and customization for client projects. Created and modified themes using Liquid, ensured responsive, cross-browser compatibility, and optimized loading speeds. Extended store functionality with apps and custom blocks, and implemented SEO best practices. Provided ongoing technical support to ensure smooth store operation.

Shopify & App Developer at P.J. Salvage

October 1, 2021 - November 30, 2022

Built high-volume single-page applications and collaboration tools with real-time chat, group management, project management, and video streaming. Implemented robust API endpoints, React-based UIs, WebRTC, and end-to-end encryption. Developed Shopify and Shopify Plus stores from scratch using Liquid, HTML, and Vanilla JavaScript; created custom apps with Laravel, React, GraphQL, and MongoDB; customized store themes and integrated third-party apps. Wrote Shopify Plus scripts for shipping, line items, and payments using Ruby; customized Recharge portals and built Vue.js-based portal themes.

Shopify Developer at Contra Collective Agency

April 1, 2020 - July 31, 2021

Transformed design files (Figma/XD) into fully responsive Shopify stores. Developed custom Shopify apps, integrated third-party services, and enhanced e-commerce functionality to deliver a superior user experience. Built a Liquid-based solution for a subscription flow; created a press page with repeatable sections for content editors, and set up an Agile Trello board for feature requests and bug fixes.

Shopify Full-Stack Engineer at YellowWebMonkey

January 1, 2023 - December 1, 2025

Designed, built, and customized Shopify themes to meet client brand guidelines and business goals, using Liquid for dynamic content and template logic. Ensured responsive storefronts across desktop and mobile, extended store functionality by integrating third-party apps and plugins; created custom blocks and bespoke features when needed. Applied SEO best practices at the theme level to improve visibility and search rankings. Provided ongoing technical support and troubleshooting to maintain smooth day-to-day operations.

Shopify & App Developer at TFC Marketing

November 1, 2021 - November 1, 2022

Architected and implemented Shopify and Shopify Plus stores from the ground up, including complete theme development using Liquid, HTML, and JavaScript. Built custom Shopify apps and internal collaboration tools using Laravel, React, GraphQL, and MongoDB to support high-volume team workflows. Developed real-time chat, group/project management, and video streaming features; incorporated shared services and WebRTC for communication. Improved security and performance through end-to-end encryption and optimized code complexity for large-scale usage. Wrote Shopify Plus Scripts for shipping, line items, and payment logic; customized Recharge customer portal with Novum theme engine and Vue.js enhancements. Integrated third-party services, modified themes, and created custom storefronts leveraging GraphQL and React.js.