QA Engineer – Payments & POS Automation

qu-careers; Arlington (VA); Hybrid; USD 80,000 - 110,000; Full time

Job summary

Qu is hiring a QA specialist focused on payments and integrations for its hybrid environment. You will design and execute manual and automated tests for payment APIs, UI flows, and EMV hardware interactions, ensuring fast, secure flows across the POS platform.

You will validate RESTful APIs with Postman, contribute to L3 certification testing with partners, and collaborate with QA, Product, and Engineering to define robust test plans.

Qualifications

• 3–5 years of QA experience in web or enterprise platforms, with a focus on payments or integrations.
• Strong experience testing payment systems, including EMV terminal workflows and cloud-to-device communication.
• Hands-on with Postman for API validation; familiarity with Swagger/OpenAPI specs.
• Experience testing web UI across browsers, responsive layouts, and frontend/backend coordination.
• Familiarity with basic backend testing using C# (xUnit, Moq) or ability to read/debug service code.
• Understanding of EMV L3 certification processes and best practices.
• EMV payment terminal certification experience is a strong plus.
• Comfort working in hybrid environments involving cloud services and on-site devices.
• Basic knowledge of MongoDB, DynamoDB, or similar databases.
• Familiarity with CI/CD pipelines and Agile/Scrum development processes.
• Strong documentation, collaboration, and bug reporting skills.

Responsibilities

• Design and execute manual and automated test cases for payment APIs, UI flows, and EMV hardware interactions.
• Perform functional, regression, and device-level testing of payment workflows (card present/card not present).
• Validate RESTful APIs using Postman, including auth flows, error handling, and integration behaviors.
• Participate in L3 certification process testing with payment partners and contribute to certification documentation.
• Collaborate closely with QA, Product, and Engineering to define clear test plans, acceptance criteria, and edge cases.
• Use browser dev tools to inspect request/response payloads; investigate logs and backend activity.
• Support test automation using Playwright, Appium, and backend verification tools.
• Assist in test data setup and backend verification using MongoDB, DynamoDB, and AWS tools.
• Document defects clearly in JIRA and contribute to test coverage during sprints and releases.
• Participate in Agile ceremonies including sprint planning, refinement, and reviews.

Skills

API testing

Postman

Automation

EMV testing

C# (xUnit Moq)

REST/JSON

UI testing across browsers

Agile/Scrum

Test planning

Tools

Playwright

Appium

Swagger/OpenAPI

Postman

JIRA

MongoDB

DynamoDB

AWS

Job description

Qu is hiring a QA specialist focused on payments and integrations for its hybrid environment. You will design and execute manual and automated tests for payment APIs, UI flows, and EMV hardware interactions, ensuring fast, secure flows across the POS platform.

You will validate RESTful APIs with Postman, contribute to L3 certification testing with partners, and collaborate with QA, Product, and Engineering to define robust test plans.