Senior Full-stack Engineer

Senior Full-Stack Engineer (E-commerce Platform)

At EX Squared LATAM, we connect top engineering talent across the region with high-impact digital products. We’re currently looking for a Senior Full-Stack Engineer to join a cross-functional team supporting a high-traffic e-commerce platform for a U.S.-based, mission-driven company.

We’re looking for a true full-stack engineer with strong frontend and backend experience, who has worked with Shopify as part of a broader, modern web architecture.

What You’ll Do

• Own and implement complex frontend features using React (and modern frameworks), with strong emphasis on performance, accessibility, and maintainability.
• Build and maintain backend APIs and services, supporting frontend functionality and integrations.
• Integrate frontend applications with Shopify Storefront APIs and internal backend systems.
• Work across the stack to deliver scalable, high-quality e-commerce experiences in a high-traffic environment.
• Collaborate closely with Product, Design, Frontend, and Backend teams to ship polished, user-focused features.
• Drive best practices around code quality, modular architecture, performance optimization, and testing.
• Break down complex initiatives into incremental, shippable deliverables.
• Contribute to architectural discussions and help improve engineering standards across the team.
• Mentor other engineers through code reviews and technical collaboration.

What You’ll Bring

• 5+ years of experience building complex web applications as a Full-Stack Engineer.
• Strong expertise in modern frontend development, particularly with React and component-based architectures.
• Solid backend experience building and maintaining APIs (experience with PHP/Laravel, Node.js, or similar backend stacks).
• Experience working with Shopify, preferably integrating custom storefronts via APIs — Shopify is important, but not the core skill.
• Comfort working in systems that span multiple backends and services.
• Strong understanding of scalable architecture, performance, and maintainable codebases.
• Experience improving existing codebases and engineering processes.
• Ability to explain technical decisions, trade-offs, and refactoring approaches clearly.
• Experience collaborating in remote, cross-functional teams.
• Advanced English proficiency (C1), comfortable communicating with U.S.-based teams.

What We Offer

+ Competitive USD compensation.
+ 100% remote work from anywhere in Latin America.
+ Flexible schedules and a people\-first culture.
+ Opportunities for continuous learning and professional growth.
+ The chance to work on global e\-commerce platforms with modern technologies.