Shopify Engineer - CB

Radial Inc.

We are hiring a Shopify Engineer to maintain and expand Landmark Global’s existing Shopify application that powers our Digital Front End platform. This application connects Shopify merchants with Landmark Global’s Mercury NextGen logistics and cross-border commerce services, enabling international shipping, duties and tax calculation, and global fulfillment capabilities. This role focuses on maintaining a production Shopify app, scaling integrations, and incrementally expanding platform capabilities over time. Rather than building a new system from scratch, the engineer will work within an established codebase to improve reliability, support merchant integrations, and deliver targeted feature enhancements. This role requires strong backend engineering skills to design and maintain orchestration layers that connect Shopify with multiple logistics and commerce systems. The engineer will help evolve the platform architecture over time as additional commerce, payments, and logistics capabilities are integrated. This role focuses on Shopify app development and platform integrations, not Shopify theme development. Platform & Technology Stack The Shopify Digital Front End platform integrates Shopify with Landmark Global’s Mercury NextGen logistics infrastructure. The core technologies used within this platform include:

Shopify Admin API (GraphQL)
Checkout UI Extensions and Shopify Functions
Node.js and TypeScript backend services
Shopify CLI and embedded app architecture
OAuth authentication and Shopify webhooks
API orchestration layers connecting Shopify to Mercury NextGen services
Cloud infrastructure and CI/CD deployment pipelines
Event-driven integrations across logistics and commerce systemsCore responsibilities will include the following areas:
Maintain and enhance Landmark Global’s existing Shopify application used by international merchants
Scale integrations between Shopify and Mercury NextGen logistics services
Develop and maintain Shopify Admin API and GraphQL integrations
Implement and enhance Checkout UI Extensions and Shopify Functions
Support cross-border ecommerce capabilities including duties and tax calculations
Design and maintain backend services and orchestration layers connecting Shopify with multiple internal systems
Develop API gateway integrations supporting shipping, compliance, payments, and fulfillment workflows
Improve reliability, performance, and maintainability of the production platform
Troubleshoot and resolve production issues affecting merchant integrations
Collaborate with Product Management to deliver incremental platform improvements
Contribute to CI/CD pipelines, automated testing, and release processes
Work with distributed engineering teams to support feature releases and platform improvements
Additional duties, as assigned Requirements/Qualifications include:
Bachelor’s degree in Computer Science, Engineering, Information Systems, or related field
5–8 years of professional software development experience
2+ years building or maintaining Shopify apps (experience limited to Shopify theme customization is not sufficient)
Strong experience developing Shopify apps using the Shopify Admin API and GraphQL
Experience implementing Checkout UI Extensions and Shopify Functions
Strong backend engineering skills using Node.js and TypeScript or similar technologies
Experience designing and maintaining API orchestration layers or gateway services that integrate Shopify with multiple backend systems
Experience integrating third‑party APIs and external platforms
Strong debugging and troubleshooting skills for production systems
Experience working in Agile development environments
Strong communication and collaboration skills working with global teams
Applicants should be prepared to provide links to Shopify apps they have built or maintained, GitHub repositories, or examples of production Shopify API integrations