Mainframe Batch Tester

Job Title: Mainframe Batch Tester

Location: 100% Remote

Duration: 12+ months (extensions likely)

Work Authorization: Preference for candidates who do not require sponsorship

We are seeking an experienced Mainframe Batch Tester to lead test planning and execution for enhancements to the ACS batch system and its integration with a cloud-based collections platform. This role will also validate onboarding of new compliance-driven data sources. The tester will ensure end-to-end accuracy in posting logic, exception handling, data quality, and auditability across batch and cloud components.

Test Planning & Design

• Develop the Master Test Plan, test scenarios, detailed test cases, and data setup strategies for batch and API/file interfaces.

• Establish traceability to requirements and risks (RTM).

Execution

• Perform SIT, regression, reconciliation, and end-to-end testing across mainframe and cloud platforms.

• Validate batch cycles (triggers, dependencies, restart/recovery) and downstream impacts (reports, statements, ledgers).

• Test negative and edge cases, including partial payments, insufficient funds, reversals, duplicates, and invalid/late feeds.

Tooling & Evidence

• Use SQL/DB2 and file compare utilities to verify results; capture logs/screens from Splunk/ELK and 3270 emulators.

• Log and track defects in JIRA/ADO; collaborate with developers/analysts on root cause analysis and retesting.

Readiness & Delivery

• Support UAT, sign-off, and cutover rehearsals; contribute to go/no-go decisions.

• Provide test execution reports, defect metrics, and cutover validation support during hypercare.

• 5+ years of functional testing experience in financial/banking systems, with direct mainframe batch exposure.

• Strong SQL and data validation expertise; experience with file feeds and API testing.

• Ability to interpret COBOL/JCL results, job logs, and abend codes at a tester s depth.

• Strong skills in documentation, defect triage, and stakeholder communication.

• Background in collections, loan servicing, or payments.

• Experience with test tools such as Postman/ReadyAPI, qTest/Zephyr, Jenkins pipelines.

• Basic scripting ability (Python, PowerShell) for automation and data setup.

• Master Test Plan

• Test cases and test data sets

• Execution reports and defect metrics

• UAT sign-off package

• Cutover validation checklist