Junior/Mid Full-Stack Developer

About Us
GymSets is a fast-growing e-commerce business specializing in fitness equipment and accessories. We build and maintain our own internal technology to support our warehouse, logistics, and order fulfillment operations. Our custom platform, GymSets HQ, powers everything from inventory management to shipping, enabling us to process hundreds of customer orders every day.

We're a small, collaborative team that values practical solutions, ownership, and continuous improvement. If you enjoy solving real-world operational challenges and seeing the direct impact of your work, we'd love to hear from you.

About the Role
We're looking for a Software Developer to join our small tech team, working on GymSets HQ, our internal warehouse, logistics, and order management platform that powers our e-commerce operations. You'll work closely with our Lead Developer and Operations team to build, improve, and maintain features that directly impact how we pick, pack, and dispatch hundreds of orders every day.

Tech Stack
• Node.js / Express (Backend)
• MySQL / MariaDB
• EJS (Server-side templating)
• Tailwind CSS v4
• AWS (EC2, S3, SQS, Lambda)
• PM2
• Shopify API
• Git / GitHub

What You'll Work On
• Build and maintain warehouse workflow features, including pick lists, parcel scanning, and label printing
• Develop and maintain Shopify integrations, including order ingestion, webhook handling, and tracking uploads
• Implement role-based access control and user management
• Create dashboard widgets and operational reports
• Debug and resolve production issues in a fast-paced environment
• Write scripts for data migration, diagnostics, and backfill processes

What We're Looking For
• Strong experience with JavaScript and Node.js
• Comfortable writing raw SQL queries, including joins, transactions, and JSON column handling
• Experience working with REST APIs and webhooks
• Ability to quickly understand and contribute to an existing codebase
• Strong debugging and problem-solving skills, with the ability to trace issues from the user interface through to the database
• Experience working on Linux servers using SSH

Nice to Have
• Experience with AWS services such as EC2, S3, Lambda, and SQS
• Shopify API or Shopify app development experience
• Experience with EJS or similar server-side templating engines
• Familiarity with PM2 or similar process managers

What We Offer
• Work on software that directly powers our warehouse operations every day
• A small, agile team with minimal bureaucracy and fast decision-making
• The opportunity to influence architecture, technical direction, and platform improvements
• Exposure to real-world e-commerce, logistics, and warehouse automation challenges
• A collaborative environment where your ideas and contributions matter

Working Hours
• Full-time position
• Monday to Friday 9:00 AM to 5:00 PM UK Time

How to Apply
Please send your application with the subject line: Developer – [Your Full Name]
• Your updated CV or resume
• A brief introduction about yourself and your relevant experience
• Links to your GitHub, portfolio, or any projects you'd like to showcase (if available)

Shortlisted applicants will be contacted for the next stage of the recruitment process.