Programmer - Advanced - Mainframe Developer - Composite Reservoir Accounts

Roles/Responsibility

• 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.
• Support implementation, conversion of any in-scope existing accounts, and early-life production runs, including on-call cover during the first cycles.
• Leave behind program documentation, data-flow notes, and runbook updates that the support team can work from.

Mandatory Skills:

1. 5+ years of Enterprise COBOL development experience in a z/OS environment
2. 5+ Years of Experience with NaturalOne
3. 3+ years of JCL development and production support experience
4. 3+ years of experience with financial/accounting systems development or support including double-entry posting, balance/accrual maintenance, value dating, reconciliation, and month-end closeouts in a regulated environment
5. 3+ years of experience working with Adabas and VSAM
6. 3+ years of experience with tracing undocumented logic through copybooks, call chains, and job streams
7. 5+ years COBOL - substantial production experience in Enterprise COBOL on z/OS, both batch and online; comfortable extending large existing programs and reading code you did not write.
8. 5+ years Natural One - the Eclipse-based Software AG development environment; developing, debugging, and deploying Natural applications from it, including local development and remote z/OS projects.
9. Natural and Adabas - Natural programs, subprograms, and maps; DDMs, descriptors and super descriptors, and Adabas file design and performance behaviour.
10. z/OS and JCL - writing and debugging JCL, procs, GDGs, utilities, SORT, and restart/rerun handling; fluent in TSO/ISPF.
11. Mainframe data stores - VSAM file design and access, and Adabas for z/OS.
12. Financial accounting logic - double-entry posting, balance and accrual maintenance, value dating, reconciliation, and month-end close in a regulated environment.
13. Analysis of legacy systems - tracing undocumented logic through copybooks, call chains, and job streams, and stating clearly what a change will and will not affect.

Desirable Skills:

1. Experience with cash management, account pooling, sweeps, or treasury applications
2. Experience with CA-7 scheduling and batch operations
3. Experience with REXX, Python, or Java
4. Track record of taking a specification from analysis through production implementation with limited supervision.
5. Clear written communication: you can explain a change to an auditor, a business analyst, and another developer, and adjust the explanation for each.
6. Degree in computer science or a related field, or equivalent practical experience.

Not required to apply. Each of these will shorten your ramp-up, and we will support you in learning the ones you do not have.

• Mixed-estate integration - calling between COBOL and Natural, and exposing mainframe function through z/OS Connect, IBM MQ, or REST services.
• Scheduling and operations - CA-7 batch window analysis and performance tuning.
• Scripting and adjacent languages - REXX or CLIST for tooling, plus Java or Python for data comparison and migration work.
• Cash management domain - notional and physical pooling, cash concentration, sweeps, and intercompany allocation.