Remote Mainframe Developer – Composite Reservoir Accounts

DP Professionals (DPP); Columbia (SC); Remote; USD 110,000 - 140,000; Full time

Job summary

DP Professionals (DPP) is seeking a Mainframe Developer for a remote-only engagement in Columbia, SC. The role focuses on building a new pooled-account structure on z/OS, extending COBOL batch processing, and ensuring batch windows stay within limits.

You will analyze current accounting programs, design end-to-end solutions, modify JCL, COBOL, and related batch processes, and produce test data and runbooks for the support team.

Qualifications

• 5+ years of Enterprise COBOL development experience in a z/OS environment.
• 5+ years of experience with NaturalOne.
• 3+ years of JCL development and production support experience.
• 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.
• 3+ years of experience working with Adabas and VSAM.
• 3+ years of experience with tracing undocumented logic through copybooks, call chains, and job streams.

Responsibilities

• 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.
• 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.

Skills

Enterprise COBOL

NaturalOne

JCL

Financial systems development

Adabas & VSAM

Copybooks tracing

Call chains

CA-7 scheduling

REXX

Python

Java

Education

CS degree or related field

Tools

CA-7

REXX

Python

Java

Job description

DP Professionals (DPP) is seeking a Mainframe Developer for a remote-only engagement in Columbia, SC. The role focuses on building a new pooled-account structure on z/OS, extending COBOL batch processing, and ensuring batch windows stay within limits.

You will analyze current accounting programs, design end-to-end solutions, modify JCL, COBOL, and related batch processes, and produce test data and runbooks for the support team.