Full-stack Software Engineer, Retention

About the Company Relay Commerce is an e-commerce enablement platform offering scaling solutions across personalized messaging, social commerce, and customer retention, helping merchants navigate the rapidly evolving digital landscape with a comprehensive suite of tools. The Relay suite of solutions currently drives more than $1 billion in aggregate incremental gross merchandise volume for more than 35,000 merchants. The Relay ecosystem currently consists of eight software products that accelerate merchant revenue growth through email marketing automation, on-page conversion optimization, user generated content management, retention analytics, and subscription management. Relay’s suite of products are established as key revenue generation tools for innovative e-commerce merchants worldwide. About the Role This is a primarily back-end role (~70%) where you will develop TypeScript services that power subscription management, billing workflows, and merchant-facing APIs used by Shopify stores processing millions of transactions.  You will independently deliver features as part of a team, proposing and agreeing the approach with an experienced team lead, implementing the solution, and monitoring and operating it in production. These systems need to be reliable, observable, maintainable, and performant. You will effectively use AI agents such as Claude code and Codex to deliver at pace. You will also contribute to our React-based front-ends (~30%) when delivering features as part of an experienced multi-functional team. About the Product Smartrr, a Relay company, is a leader in subscription solutions for e-commerce brands. The platform empowers hundreds of Shopify merchants to launch, manage, and scale their subscription and loyalty programs with ease. Smartrr has powered more than $300 million in transaction volume—helping brands build stronger, more profitable customer relationships