Position Overview
Client is seeking an experienced Mainframe COBOL / NaturalOne Developer to enhance an existing mainframe accounting platform by introducing composite reservoir accounts. These accounts pool balances from multiple subsidiary accounts into a central reservoir account under defined sweep and allocation rules.
The developer will analyze a large, lightly documented legacy codebase and extend existing functionality to support account posting, settlement, accruals, reporting, and reconciliation. Financial accuracy, auditability, and traceability are essential.
Key Responsibilities
- Analyze existing account master, posting, and balance-maintenance programs to identify required changes and document findings.
- Design and develop composite reservoir account functionality, including master files, tables, account opening and closing, participant linkage, sweep and reverse-sweep processing, allocation, interest apportionment, and closing balance calculations.
- Modify batch COBOL programs and JCL to incorporate new processing into nightly and month-end cycles within agreed batch windows.
- Extend audit trails, exception reporting, and reconciliation controls in collaboration with accounting stakeholders.
- Create test data, unit tests, regression test packs, and parallel-run comparisons against current production output.
- Investigate and explain all differences identified during testing and reconciliation.
- Support implementation, conversion of in-scope existing accounts, and initial production cycles, including on-call coverage.
- Maintain program documentation, data-flow notes, and operational runbooks.
- Follow formal change control procedures, including peer review and signed-off implementation plans.
Required Qualifications
- Enterprise COBOL development in a z/OS environment: 5+ years
- NaturalOne: 5+ years
- JCL development and production support: 3+ years
- Financial/accounting systems development or support in a regulated environment: 3+ years
- Adabas and VSAM: 3+ years
- Tracing undocumented logic through copybooks, call chains, and job streams: 3+ years
Rate:
Not specified
Location:
United States
IR35 Status:
Outside
Remote Status:
Remote
Industry:
IT
Seniority Level:
Senior