[Hiring] Staff Software Engineer @Rebuy, Inc.

Role Description

You'll join the team that owns Checkout, Post-Purchase, Smart Flows, and A/B Testing — what a shopper sees during and after checkout on Shopify, and the tools merchants use to run experiments on their stores. Some of these surfaces run inside Shopify's checkout and post-purchase pages, some of the most constrained runtimes in web development; others are our own PHP services, a TypeScript API, MySQL, and a BigQuery event pipeline. You'll work across all of it.

• Own Shopify checkout and post-purchase features.
• Build and maintain the extensions that render Rebuy offers inside Shopify's checkout, thank-you, customer-account, and post-purchase surfaces.
• Understand and work within the limits Shopify imposes on these runtimes: bundle size, sandboxed APIs, and strict review.
• Rebuild experimentation reporting.
• Design the data model, the PHP and TypeScript endpoints, and the BigQuery and MySQL queries behind it.
• Build robust REST APIs.
• Investigate merchant-reported problems that come to the team through our Product Manager.
• Work AI-first using Anthropic's Claude Code across development, review, and testing.
• Do your own quality assurance.
• Look beyond your own ticket.

Qualifications

• Proven track record operating with Staff-level ownership.
• Fluent daily use of AI coding tools.
• Strong troubleshooting in an unfamiliar codebase.
• 8+ years building production web applications.
• Experience owning a revenue-critical, customer-facing system in production.
• Hands-on experience with BigQuery on Google Cloud or another columnar warehouse.
• Testing discipline across unit and end-to-end suites.
• Solid understanding of secure coding fundamentals.
• A track record with orchestration and building platform-wide, componentized systems.
• A strong fit for remote-first, high-autonomy culture.
• Educational background in CS / Engineering or a similar area, or equivalent experience.

Requirements

• Shopify app development, especially Checkout Extensibility, post-purchase extensions, or the Admin and Storefront GraphQL APIs.
• Preact.
• Comfortable moving between Kanban and Sprint-based workflows.

Benefits

• Fully remote company across the U.S. and Canada.
• Flexible vacation policy, generous holiday schedule, parental leave, and sick policy.
• 100% free health, dental, and insurance for you and your family.
• 401(k) retirement plans for U.S. employees and TFSA and RRSP retirement plans for Canadian employees.
• 3% contribution of your gross salary, no matter where you’re located.
• Compensation reflects the cost of labor across several U.S. geographic markets.