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I’m a results-driven full-stack engineer with a 10-year track record building and maintaining robust eCommerce platforms, especially on Shopify. I’ve designed and implemented Shopify themes and apps, integrated Vue with Shopify, and delivered frontend and backend solutions that scale across teams and markets. I thrive on turning complex requirements into reliable, user-friendly systems and I enjoy collaborating with design and product to ship value quickly. My experience spans Shopify, Node/React, Ruby on Rails, and modern frontend ecosystems, with a focus on performance, security, and maintainability. I’m seeking senior full-stack opportunities where I can lead architecture, mentor teammates, and deliver high-impact solutions for commerce and software platforms.…I’m a results-driven full-stack engineer with a 10-year track record building and maintaining robust eCommerce platforms, especially on Shopify. I’ve designed and implemented Shopify themes and apps, integrated Vue with Shopify, and delivered frontend and backend solutions that scale across teams and markets. I thrive on turning complex requirements into reliable, user-friendly systems and I enjoy collaborating with design and product to ship value quickly. My experience spans Shopify, Node/React, Ruby on Rails, and modern frontend ecosystems, with a focus on performance, security, and maintainability. I’m seeking senior full-stack opportunities where I can lead architecture, mentor teammates, and deliver high-impact solutions for commerce and software platforms.

David Rosario

Full Stack Developer, Web Developer, Front-End Developer, +2

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I’m a results-driven full-stack engineer with a 10-year track record building and maintaining robust eCommerce platforms, especially on Shopify. I’ve designed and implemented Shopify themes and apps, integrated Vue with Shopify, and delivered frontend and backend solutions that scale across teams and markets. I thrive on turning complex requirements into reliable, user-friendly systems and I enjoy collaborating with design and product to ship value quickly. My experience spans Shopify, Node/React, Ruby on Rails, and modern frontend ecosystems, with a focus on performance, security, and maintainability. I’m seeking senior full-stack opportunities where I can lead architecture, mentor teammates, and deliver high-impact solutions for commerce and software platforms.…I’m a results-driven full-stack engineer with a 10-year track record building and maintaining robust eCommerce platforms, especially on Shopify. I’ve designed and implemented Shopify themes and apps, integrated Vue with Shopify, and delivered frontend and backend solutions that scale across teams and markets. I thrive on turning complex requirements into reliable, user-friendly systems and I enjoy collaborating with design and product to ship value quickly. My experience spans Shopify, Node/React, Ruby on Rails, and modern frontend ecosystems, with a focus on performance, security, and maintainability. I’m seeking senior full-stack opportunities where I can lead architecture, mentor teammates, and deliver high-impact solutions for commerce and software platforms.

Available to hire

I’m a results-driven full-stack engineer with a 10-year track record building and maintaining robust eCommerce platforms, especially on Shopify. I’ve designed and implemented Shopify themes and apps, integrated Vue with Shopify, and delivered frontend and backend solutions that scale across teams and markets. I thrive on turning complex requirements into reliable, user-friendly systems and I enjoy collaborating with design and product to ship value quickly.

My experience spans Shopify, Node/React, Ruby on Rails, and modern frontend ecosystems, with a focus on performance, security, and maintainability. I’m seeking senior full-stack opportunities where I can lead architecture, mentor teammates, and deliver high-impact solutions for commerce and software platforms.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Work Experience

Senior Shopify Engineer at Blazar Capital

April 1, 2025 - April 1, 2025

Developed 50+ Shopify theme sections using Liquid, HTML5, Vue, and Tailwind CSS, enabling feature integration across five Shopify shops. Implemented a Vite-based deployment pipeline via Shopify CLI for multi-country deployment. Built a Shopify app proxy to securely call external APIs with five third-party services, boosting CRM capabilities. Created a Vue-based backend to manage subscriptions and orders, replacing the default Shopify account area. Built a Vue-based app to collect hair-characteristic photos for an AWS-hosted AI model. Implemented Email Automation via Klaviyo and Reviews & Loyalty via Yotpo. Implemented subscriptions using Recharge, Seal Subscription, and Bold.

Shopify Developer at ECOM DEPARTMENT

August 1, 2024 - August 1, 2024

Led theme development & app integration. Worked with Liquid + Vanilla JS; developed an inventory management system; built storefronts using Node + Express + React + MongoDB; leveraged Storefront API with React. Conducted CRO through Google Optimize and implemented analytics/tracking on PDP, cart, and checkout. Implemented business logic via Shopify Plus Script Editor.

Ruby on Rails | Shopify Developer at Prime Trust

December 1, 2017 - December 1, 2017

Contributed the majority of the Rails codebase to launch a startup within three months, enabling $16M in activity. Integrated third-party services (SendGrid, Vantiv, Trulioo, OFAC checks). Onboarded new employees, created a customizable email template system, and maintained private/public Shopify apps. Migrated WordPress/Magento stores to Shopify Plus and automated workflows with Shopify Flow; optimized store speed and implemented A/B methodologies.

React Developer at Intuit

January 1, 2022 - January 1, 2022

Delivered updates to a web app featuring an interactive map view for property attributes, a Kanban page for research tasks, and a Property Details page with charts. Collaborated with clients and users to refine requirements and UX flows; reinforced UI consistency across the app.

React Developer at Trailmapper, Inc.

January 1, 2020 - January 1, 2020

Created an MVP CRM for political fundraising using React with Redux (RTK and RTK Query). Styled with Material Tailwind and integrated with Recharts and React Table Library. Iterated UX based on evolving project goals, and assisted with task management and scheduling.

React/UI Developer at Rubicon, Inc

February 1, 2019 - February 1, 2019

Led a landing page refresh for a cryptocurrency exchange. Collaborated with design to deliver an updated Next.js site using Tailwind CSS that aligned with Rubicon DeFi branding.