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StockX is seeking a Software Development Engineer in Test (SDET) to own quality across services that shape the customer experience during and after order placement. You will be responsible for testing the entire order lifecycle—from trade execution and delivery date calculations to managing cancellations, returns, and order page updates. Your scope includes customer support chat functionality, buyer-seller communications, real-time order history, and offer tracking. You will also ensure the reliability of RBAC-enabled internal APIs and CRM integrations.
You will work across a rich technical ecosystem including an internal agent portal, GraphQL APIs, event-driven Kafka pipelines, OpenSearch-powered search, the bid-ask-decorator service, the estimated-delivery-date service, and a real-time chat platform. The tech stack spans Amazon Web Services, GraphQL, Node.js, NestJS, TypeScript, React, CircleCI, Kubernetes, Harness, Terraform, LaunchDarkly, OpenSearch, Kafka, SQS, Redis, Postgres, and Datadog.
Key responsibilities include collaborating with engineers and product managers to deliver high-quality products; performing functional, regression, and smoke testing; reviewing documentation to define requirements and create test cases; executing manual and automated tests; driving testing best practices including performance, load, and security testing; developing and maintaining automated test cases within existing frameworks; applying GitHub and CI/CD best practices; and working with the QA team to build product knowledge and share results. You will design, create, document, and implement test strategies, automation tools, and processes.
You are expected to own quality decisions, not just execute test cases. You will identify gaps, propose solutions, and present your work in team and org-level forums. The role includes mentoring junior team members.
StockX is a Detroit-based technology leader in the online marketplace for sneakers, apparel, accessories, electronics, collectibles, and trading cards. The platform connects buyers and sellers globally using dynamic pricing mechanics, with hundreds of brands including Jordan Brand, Nike, adidas, Supreme, and major electronics manufacturers. Founded in 2016, StockX employs 1,000 people across offices and verification centers worldwide.
