QA Engineer (Payments Squad)

Qu; Arlington (VA); Hybrid; USD 75,000 - 95,000; Full time

Job summary

Qu, located in Arlington, Virginia, is seeking a QA Specialist for its Payments squad. This hybrid position demands expertise in functional testing and automation of payment systems, including EMV terminals.

The successful candidate will design and execute test cases, validate APIs, and collaborate with various teams. A strong understanding of QA processes and payment systems is essential. Join a dynamic team to enhance our software solutions in the restaurant industry!

Qualifications

• 3–5 years of QA experience in web or enterprise platforms with a focus on payments.
• Experience testing payment systems and EMV terminal workflows.
• Comfort working in hybrid environments involving cloud services and on-site devices.

Responsibilities

• Design and execute manual and automated test cases for payment APIs.
• Validate RESTful APIs using Postman.
• Collaborate with QA, Product, and Engineering teams.

Skills

QA experience

Payments systems testing

API validation with Postman

C# backend testing

Documentation skills

Tools

Postman

JIRA

MongoDB

DynamoDB

Playwright

Appium

Job description

At Qu you’ll find a fun, dynamic, and diverse culture that celebrates team and individual success. Our people are down to earth, trail blazin’ folks who value innovation. While mostly virtual, we collaborate closely to produce leading-edge software solutions much needed in the restaurant industry.

At Qu You Will

Support the Payments squad, which is responsible for core payment flows and integrations across our POS platform. This hybrid QA role combines strong functional testing skills with growing automation capabilities. You’ll test APIs, payment processing flows, and integrated hardware like EMV terminals, ensuring our payment experience is fast, secure, and reliable. The ideal candidate is detail‑oriented, comfortable working with backend systems and hardware, and experienced in validating payments and POS workflows in web‑based environments.

Overview

• 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 behaviours.
• 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.

What We’re Looking For

• 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.

Bonus Experience

• Automation experience with Playwright, Appium, or similar tools.
• Experience with AWS‑based environments, test containers, or device farms.
• Previous QA experience in POS, payment gateway, or fintech domains.
• Familiarity with terminal simulators, payment SDKs, or mock acquirer environments.
• Experience testing offline/online fallback flows or device network behaviour.