Senior Full Stack Developer

Job Title: Senior Full Stack Developer (Shopify, PHP, and Custom Systems) Type: Full-time; Remote Schedule: US Time zone We are looking for a highly capable, hands-on Full Stack Developer with 4-6 years of professional experience.
This role is for a builder who understands the "how" and "why" behind the code.
We aren't looking for someone who just stitches together React libraries; we need someone who can write clean, high-performance vanilla JavaScript and handle complex backend logic.
You will be responsible for building end-to-end web experiences, managing custom Shopify environments, and maintaining the infrastructure that powers them.
Key Responsibilities No-Framework Frontend: Develop interactive, lightweight user interfaces using Vanilla JavaScript and jQuery.
You must be able to solve complex UI challenges without relying on React, Vue, or Angular.
Custom Shopify Development: Build and maintain bespoke themes using Liquid and implement advanced logic via Shopify Functions.
Backend & Database Management: Design and maintain SQL databases and write server-side logic in PHP.
Infrastructure: Manage hosting and deployments on Heroku and AWS, including the configuration of Cron jobs for automated tasks.
System Integration: Build and consume REST APIs to connect our storefront with internal and external services.
Technical Requirements Experience: 4–6 years in a professional full-stack role.
Shopify Stack: Expert-level knowledge of Liquid, Shopify APIs, and the new Shopify Functions API.
Languages: Deep proficiency in PHP, SQL, and "Plain Vanilla" JavaScript.
DevOps: Experience managing environments on Heroku and handling database migrations/management.
Automation: Ability to set up and troubleshoot server-side scheduled tasks (Cron).
"Nice to Have" Skills Image Processing: Experience with programmatic image generation, layering, or synthesis (e.
g., using GD library, ImageMagick, or Canvas).
Complex Scripting: Experience handling heavy data processing or asset manipulation on the fly.