Referso Jobs

Programmer - Advanced - Mainframe Developer - Composite Reservoir Accounts

Omega Solutions · Posted Nov 13, 2026

Build a new pooled-account structure inside a running z/OS core, without disturbing the balances already on it.

Analyze the current account master, posting, and balance-maintenance programs to establish where composite reservoir accounts must be recognized, and document what you find.
Design and code the new account type end to end: master file and table structures, account opening and closing, participant linkage, sweep and reverse-sweep logic, allocation and interest apportionment, and closing balance derivation.
Modify batch COBOL programs and JCL and extend the nightly and month-end cycles to include the new processing without lengthening the batch window beyond agreed limits.
Add new CRAs to the audit trail, exception reporting, and reconciliation controls the new function requires, working with accounting stakeholders on what must be evidenced.
Produce test data, unit and regression test packs, and parallel-run comparisons against current production output; investigate every difference until it is explained.

Degree in computer science or a related field, or equivalent practical experience
Nice to have: cash management
Nice to have: account pooling
Nice to have: sweeps
Nice to have: treasury applications