Mainframe Tester

Groupe Kardol; New York (NY); On-site; USD 100,000 - 140,000; Full time

Job summary

Groupe Kardol in New York City, NY is seeking a Mainframe Tester with deep hands-on experience in both manual and automated testing, including Playwright and Cucumber. The role requires strong collaboration with Product, DevOps, Engineering, and Operations to ensure quality across legacy mainframe and modern distributed systems.

Key responsibilities include designing end-to-end test strategies, building CI/CD test automation, and leveraging data-driven decisions to optimize coverage, risk

Qualifications

• 8+ years of software testing experience including manual and automated frameworks
• Hands-on experience with Playwright, Cucumber and end-to-end test strategies
• Experience testing legacy systems and data migrations in mainframe environments
• Ability to partner with Product, DevOps, Engineering and Operations to embed quality

Responsibilities

• Define and execute test strategies for complex workflows across distributed and mainframe platforms
• Develop and maintain automated regression suites integrated in CI/CD
• Collaborate with cross-functional teams to ensure timely delivery and quality gates
• Monitor metrics like defect leakage and test coverage to continuously improve quality

Skills

Jenkins

Selenium

Playwright

Cucumber

Tools

TestRail

qTest

JIRA

Insomnia

GitLab CI

Job description

Job Title : Mainframe Tester

Location: New York City, NY

Primary Skill : CICD Tools- Jenkins, Selenium, Playwright

Job Description

Domain & Technical Expertise- 8+ years of software-testing experience, including deep hands-on work in both manual and automated frameworks (e.g., Playwright, Cucumber).

Proven track record building end-to-end test strategies for complex, front-to-back workflows.

Hands-on experience with legacy mainframe systems:

understanding how the mainframe processes data, designing and validating data-migration flows from mainframe to distributed tiers, and testing those migrations in the live mainframe environment.

Collaboration- Strong influencer: comfortable partnering with Product, DevOps, Engineering and Operations to embed quality throughout the delivery lifecycle.

Skilled at balancing PODs individual priorities while maintaining a coherent, end-to-end test strategy across both distributed and mainframe platforms.

Strategic & Analytical Mindset- Experience defining test roadmaps, metrics/KPIs (e.g., defect leakage, test coverage, automation percentage) and continuously improving them.

Skilled at risk-based testing: prioritizing what to test when timelines are tight and leveraging *data* to drive coverage decisions.

Process & Tooling Savvy- Hands-on with CI/CD pipelines (Jenkins, GitLab CI, DevOps) to build automation into nightly/regression suites.

Expert in Playwright for UI automation and Insomnia for API testing. - Familiarity with modern test management platforms (TestRail, qTest) and defect-tracking tools (JIRA).

Communication & Stakeholder Management

Exceptional verbal and written communicator able to translate technical test results into clear, actionable insights for both technical and non-technical audiences.

Proactive in surfacing risks early and driving cross-team alignment on scope, timelines and acceptance criteria.

Playwright Cucumber/BDD Selenium Mainframe Testing CICD Jira, Scrum, Kanban