Senior QA Engineer - API & Integration Automation

About the role

Software Mind is partnering with a US-based promotional products and e-commerce company to build a new shipping and delivery service for its white-label B2B commerce platform, built on Shopify Plus with a .NET microservices backend on AWS. The engagement is short and focused: a discovery phase followed by two-week sprints to production release. The Senior QA Engineer defines the test strategy and runs end-to-end tests, including automation.

Key responsibilities

• Define the test strategy, quality metrics and test approach during discovery
• Derive test cases from acceptance criteria with the Business Analyst
• Test REST APIs end-to-end: functional, contract, negative and boundary scenarios
• Validate business-rule logic, including date/time and edge cases
• Run integration tests against third-party APIs and sandboxes, including error and timeout handling
• Test event-driven, asynchronous flows (queues, retries, error handling)
• Execute end-to-end e-commerce scenarios across storefront, backend services and downstream systems
• Build and maintain automated API and regression suites in CI/CD
• Test web admin interfaces
• Coordinate with client and partner QA teams, drive defect triage, UAT support and release-readiness sign-off

Required profile

• 5+ years in software QA, including 3+ years of API and integration test automation
• Experience testing asynchronous, event-driven systems (AWS SQS / SNS or equivalent)
• Defect and test management in Jira (Xray, Zephyr or similar)
• Experience coordinating with client-side QA and supporting UAT in multi-vendor projects
• Excellent written and spoken English for daily client interaction

Required skills

• Strong REST API testing: JSON, OpenAPI / Swagger, Postman or code-based frameworks
• Test automation in C# / .NET (xUnit / NUnit, Reqnroll / SpecFlow) or TypeScript (Playwright)
• Rigorous test design: decision tables, boundary values, equivalence partitioning
• Integrating automated tests into CI/CD pipelines

Nice to have: e-commerce checkout testing on Shopify, shipping or carrier APIs, performance and load testing (k6, JMeter), contract testing (Pact), and AI-assisted test design.