Automation Test Engineer

Automation Test Engineer – Payments

Java,Rally,Selenium,Cucumber,T3,payment

OFALLON, MO

We are seeking a skilled Payment Tester with hands‑on experience in payment systems, specifically in Authorization, Clearing processes, and ISO message formats. The ideal candidate will play a critical role in validating payment flows, ensuring compliance with standards, and supporting end‑to‑end testing of payment transactions.

• Perform functional and integration testing of payment systems with a focus on transaction flows.
• Validate Authorization and Clearing processes across various payment scenarios.
• Analyze and test ISO 8583 and ISO 20022 message formats for accuracy and compliance.
• Collaborate with development and business teams to understand requirements and create detailed test cases.
• Execute test plans, log defects, and ensure timely resolution.
• Work closely with Client teams to align testing with network specifications and updates.
• Support regression testing and automation initiatives where applicable.

• Exposure to agile and waterfall testing methodologies and tools such as RALLY and ALM.
• Knowledge in Java/C/C++ development in Test automation.
• Experience of working with other developers to ensure that systems are designed for reliability, performance and testability.
• Experience testing across a variety of platforms: web and mobile user interface, APIs (REST and SOAP), and Mainframe and UNIX.
• Exposure in building and using automation frameworks using technologies:
  Java, JUnit, Selenium, JBehave, Soap UI/Pro, REST, JSON and XML.
• Expert knowledge of Payments Products (Credit/Pre-paid/Debit).
• Knowledge of payment simulation tools (Paragon, Fin Sim, T3 or similar).
• Knowledge of ISO payment protocols (8583) desirable.

• Experience with other payment networks (e.g., Visa, Client) is a plus.
• Knowledge of automation frameworks and scripting languages.
• ISTQB or equivalent testing certification.

Diverse Lynx LLC is an Equal Employment Opportunity employer. All qualified applicants will receive due consideration for employment without any discrimination. All applicants will be evaluated solely on the basis of their ability, competence and their proven capability to perform the functions outlined in the corresponding role. We promote and support a diverse workforce across all levels in the company.