Mainframe QA Engineer / Onsite in Plano

A leading enterprise technology organization is currently looking for a Senior Mainframe Quality Engineer to join its core platform engineering team. This role will support the testing and validation of a model-driven development platform used to build and maintain large-scale enterprise applications across mainframe and distributed environments.

In this role, you’ll work closely with developers, platform engineers, and stakeholders to ensure the quality and reliability of applications running in a mainframe (z/OS) environment. The ideal candidate brings strong experience in end-to-end testing, including system, integration, and acceptance testing, along with hands-on experience validating both legacy and modernized application workflows. This individual will play a key role in ensuring platform stability, supporting internal users, and improving overall testing practices across the environment.

It is a fully onsite position based in Plano, Texas.

Required Skills & Experience

Bachelor’s degree in Computer Science, Information Technology, or a related field
5+ years of experience working in software quality assurance roles
Hands-on experience testing mainframe-based applications (z/OS environment)
Experience working with technologies such as COBOL, JCL, DB2, or CICS
Strong understanding of end-to-end testing methodologies (system, integration, UAT)
Experience creating, executing, and maintaining detailed test cases and test plans
Experience identifying, documenting, and tracking defects using tools such as Jira
Experience working in Agile or Scrum development environments
Strong analytical, problem-solving, and communication skills
Ability to work independently and take ownership of testing efforts

Desired Skills & Experience

Experience with test automation (Python preferred, but not required)
Exposure to mainframe tools such as TSO/ISPF or similar environments
Experience working with messaging or middleware technologies (IBM MQ, etc.)
Familiarity with modern development tools such as Git, CI/CD pipelines, or similar
Experience supporting large-scale enterprise or platform-based applications
Ability to learn and adapt to new tools and frameworks quickly

What You Will Be Doing

Tech Breakdown

70% Manual Testing (Mainframe /zOS)
30% Automation (Python based)

Daily Responsibilities

100% Hands on

The Offer

Salary + Benefits

You Will Receive The Following Benefits

Medical, Dental, and Vision Insurance
Vacation Time
Stock Options

Applicants must be currently authorized to work in the US on a full-time basis now and in the future.

Posted By: Jordan Carbonell
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