Fullstack Developer

Global-e ReturnGO is a post-purchase solution that enables merchants to efficiently manage returns and exchanges. Serving thousands of merchants across the e-commerce ecosystem, ReturnGO includes two main frontend applications, one for merchants and one for shoppers, and integrates seamlessly with leading e-commerce platforms and systems.

The shopper-facing frontend was completely rewritten six months ago and remains in active development. The backend consists of a BFF in NestJS, a PHP monolith, and several NestJS microservices, all backed by RDS/MySQL and SQS queues. Scalability is ensured via ECS and monitored through metric alerts, automatically flagging system issues. Our focus is in scaling the solution to serve twice as many merchants in a short period, while implementing quality procedures to support this growth.

Responsibilities

• Own end-to-end feature delivery and infrastructure improvements.
• Drive technical decisions across frontend and backend, ~70% React, ~30% PHP, 10% NestJS,
• Build production features using an AI-first development (Cursor, Claude Code, MCPs, etc.).
• Write and maintain high-quality unit, integration, and end-to-end tests.
• Promote engineering best practices, code quality, and scalable architecture.
• After a while, become a topic leader of some topics you own (similar to guilds).