IT - STO - Programmer - Advanced - Mainframe Developer - Composite Reservoir Accounts

Columbia, SC
Remote

$75–$78 Per Hour
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Job Description

Job Title: Mainframe Developer
Job Duration: 6 Months
Job Location: Columbia, SC, 29201 (Remote)

Job Summary:

Build a new pooled-account structure inside a running z/OS core, without disturbing the balances already on it.
We are adding new composite reservoir accounts to our existing mainframe accounting platform: a pooled account structure in which balances from multiple subsidiary accounts are concentrated into, and drawn back from, a single reservoir account under defined sweep and allocation rules.
This is additional function inside a legacy system. You will be reading a large body of COBOL that has been in production for an extended period, much of it lightly documented, and extending it so that the new account type posts, settles, accrues, reports, and reconciles exactly as the existing types do.
Correctness and traceability of every cent matter more than speed of delivery.

Job Responsibilities:

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.

Required Skills:

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
These are the skills we expect to see evidence of in the first conversation.
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.
NaturalOne the Eclipse-based Software AG development environment; developing, debugging, and deploying Natural applications from it, including local development and remote z/OS projects.
Natural and Adabas Natural programs, subprograms, and maps; DDMs, descriptors and superdescriptors, and Adabas file design and performance behavior.
z/OS and JCL writing and debugging JCL, procs, GDGs, utilities, SORT, and restart/rerun handling; fluent in TSO/ISPF.
Mainframe data stores VSAM file design and access, and Adabas for z/OS.
Financial accounting logic double-entry posting, balance and accrual maintenance, value dating, reconciliation, and month-end close in a regulated environment.
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.

Preferred Skills:

Experience with cash management, account pooling, sweeps, or treasury applications
Experience with CA-7 scheduling and batch operations
Experience with REXX, Python, or Java
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.

Additional Skills

Track record of taking a specification from analysis through production implementation with limited supervision.
Clear written communication: you can explain a change to an auditor, a business analyst, and another developer, and adjust the explanation for each.
Degree in computer science or a related field, or equivalent practical experience.

How We Work:

Production changes follow formal change control with peer review and a signed-off implementation plan.

Numbers & Facts

Location	Columbia, SC ( Remote)
Salary	$75–$78 Per Hour

Skills

Accountingunmatched
Accounting Closeunmatched
Accounting Softwareunmatched
Accrual-Basis Accountingunmatched
Adabasunmatched
Analysis Skillsunmatched
Auditingunmatched
Business Analysisunmatched
Cash Managementunmatched
Change Controlunmatched
Cobol Programming Languageunmatched
Communication Skillsunmatched
Computer Programmingunmatched
Computer Scienceunmatched
Data Migrationunmatched
Debugging Skillsunmatched
Documentationunmatched
Financial Accountingunmatched
Financial Systemsunmatched
IBM Clist Programming Languageunmatched
IBM Rexx Programming Languageunmatched
IBM TSO/ISPFunmatched
IBM WebSphere MQ (Message Queue)unmatched
IBM z-OS Operating Systemunmatched
JCL (Job Control Language)unmatched
Javaunmatched
Machine Toolunmatched
Mainframe Computerunmatched
On Callunmatched
Performance Tuning/Optimizationunmatched
Production Supportunmatched
Python Programming/Scripting Languageunmatched
REST (Representational State Transfer)unmatched
Reconciliationunmatched
Regression Testingunmatched
Scripting (Scripting Languages)unmatched
Software Developmentunmatched
Systems Analysisunmatched
Test Dataunmatched
Traceabilityunmatched
Treasuryunmatched
Unit Testunmatched

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