Senior Full Stack Engineer

About Artist Shot

Artist Shot is a global online marketplace connecting artists, designers, brands, and entrepreneurs with customers looking for unique, personalized products. Through our print-on-demand and custom manufacturing platform, creators sell their designs on apparel, accessories, and home décor without ever touching inventory, production, or fulfillment. We blend creative commerce, deep customization, and on-demand manufacturing to turn ideas into real products - fast. Our team works at the intersection of technology, design, and e-commerce, serving customers worldwide and giving both emerging and established creators a platform that scales with them.

The Role

We're looking for a pragmatic, high-leverage Senior Full-Stack Engineer to help lead the technical evolution of our large-scale print-on-demand marketplace. Our core platform runs on PHP, JavaScript, and MySQL within an MVC framework, powering multi-channel sales, custom admin and vendor panels, complex checkout flows, and dozens of critical third-party integrations.

This is a full-time, on-site role based in Bucaramanga. This requirement is not negotiable.

What You'll Do

• Maintain & modernize - Drive the continuous evolution of a mature, high-traffic codebase, strengthening its architecture and performance while keeping 24/7 production stable.
• Build complex integrations - Design, build, and optimize checkout flows, webhooks, and asynchronous background sync across a broad ecosystem:
• Payments & tax: Stripe, PayPal, Braintree, Square, Afterpay, Avalara, Stripe Tax
• Fulfillment & shipping: Printful, ScalablePress, ShipStation, DHL, and more
• Marketplaces: inventory, catalog, and order sync across Shopify, eBay, and Amazon
• Marketing: Klaviyo, HubSpot, Facebook Business SDK, Google Shopping
• Establish AI-augmented standards - Define and maintain our AI development guidelines: managing project steering context, building automated guardrails (credential scanning, migration generation), and leveraging MCP (Model Context Protocol) servers to streamline workflows.
• Lead & mentor - Set high standards through rigorous human code review, especially for payments, authentication, and sensitive data, and mentor mid-level and junior engineers through pair programming and clear documentation.

What We're Looking For

• Advanced PHP & MVC - Deep, production-tested experience with PHP and MVC frameworks.
• Database mastery - Advanced MySQL: query optimization, strategic indexing, N+1 prevention, and robust data modeling.
• Modern frontend expertise - Strong command of semantic HTML5, CSS3, and modern JavaScript (ES6+), with hands-on experience in at least one major framework such as React, Next.js, or Angular, plus asset optimization (lazy loading, minification, cache busting).
• Asynchronous architecture - Proven experience building webhook handlers, cron jobs, and background processes for large-scale data synchronization.
• AI-assisted engineering - Hands-on familiarity with tools like Kiro, Claude, GitHub Copilot, or ChatGPT, and interest in structured workflows (spec-driven development, agent hooks, versioned context files).
• A human-first mindset - A firm commitment to meticulous human review for any code touching financial transactions, routing, or authentication.
• Everyday fluency with version control (Git), automated testing, and CI/CD.
• Strong communication and a collaborative, cross-functional mindset.

Bonus Points

• Experience in e-commerce, marketplaces, or print-on-demand.
• Production empathy - a calm, methodical approach to incident response in high-volume, live environments.
• Pragmatic refactoring instincts - the ability to take a large, complex helper, map its dependencies with modern tooling, and safely modularize it step by step.
• Bachelor's in Computer Science, Engineering, or a related field, or equivalent practical experience.