Senior Full Stack Developer

Activate Talent

Colombia Remote permanent

Posted: March 9, 2026

Job Description

We are looking for a highly capable, hands-on Senior Full Stack Developer with 4–6 years of professional experience. This role is for a builder who understands both the how and why behind the code.

We aren’t looking for someone who simply stitches together frontend frameworks. Instead, we need a developer who can write clean, high-performance vanilla JavaScript, build reliable backend systems, and manage the infrastructure that powers them.

You will be responsible for building end-to-end web experiences, managing custom Shopify environments, and maintaining the backend systems and infrastructure that support them.

Key Responsibilities

No-Framework Frontend

• Develop interactive, lightweight user interfaces using Vanilla JavaScript and jQuery
• Solve complex UI challenges without relying on frameworks such as React, Vue, or Angular
• Build performant frontend experiences optimized for speed and usability

Custom Shopify Development

• Build and maintain custom Shopify themes using Liquid
• Implement advanced logic and custom functionality using Shopify APIs and Shopify Functions

Backend & Database Management

• Design, build, and maintain SQL databases
• Develop server-side logic using PHP
• Ensure systems are scalable, secure, and efficient

Infrastructure & Deployment

• Manage hosting and deployment environments on Heroku and AWS
• Configure and maintain Cron jobs for automated server-side processes
• Monitor system performance and troubleshoot infrastructure issues

System Integration

• Build and consume REST APIs to connect storefront systems with internal tools and third-party services
• Maintain reliable integrations and ensure smooth data flow across platforms

Requirements:
• 4–6 years of experience in a professional full-stack development role
• Expert-level knowledge of Shopify development, including Liquid, Shopify APIs, and Shopify Functions
• Strong proficiency in PHP, SQL, and Vanilla JavaScript
• Experience managing Heroku environments and backend deployments
• Ability to manage databases and perform migrations
• Experience setting up and maintaining server-side scheduled tasks (Cron)

Nice to Have

• Experience with programmatic image processing, generation, or manipulation
• Tools such as GD Library, ImageMagick, or Canvas

• Experience handling complex scripting, heavy data processing, or asset manipulation in real time

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