Mainframe Developer (Senior)
$95,000–$115,000 year
HybridChicago, Illinois, United States
Job Summary
Lead mainframe-based healthcare claims adjudication systems by analyzing, designing, and implementing complex fixes, enhancements, and maintenance updates using COBOL, DB2, VSAM, JCL, and CICS. Investigate and resolve critical production incidents, batch failures, and performance issues through root cause analysis, while supporting system upgrades, releases, and integration activities. Partner with stakeholders to translate claims requirements into technical designs, enforce coding standards via code reviews, and mentor junior developers on debugging and production support practices. Create technical documentation, runbooks, and knowledge-transfer materials to ensure compliance and traceability for application changes.
Required Qualifications
- 6–9 years of hands-on mainframe application development experience
- Strong development experience with COBOL
- Strong development experience with DB2
- Strong development experience with VSAM
- Strong development experience with JCL
- Strong development experience with CICS
- Experience supporting, enhancing, and troubleshooting mainframe-based enterprise applications
- Hands-on experience with mainframe debugging tools such as Xpediter, File-AID, Abend-AID, or equivalent tools
- Strong experience investigating production defects, batch abends, performance issues, and application failures
- Experience conducting root cause analysis and delivering permanent fixes for recurring issues
- Knowledge of healthcare claims processing and claims adjudication workflows
- Experience with healthcare EDI transactions, including 837 claims and 835 remittance advice files
- Working knowledge of ICD-10 coding standards and their impact on claims processing
- Ability to analyze business requirements and convert them into technical specifications, program designs, and implementation plans
- Experience participating in code reviews, testing, release management, and change-control processes
- Strong problem-solving, written communication, documentation, and stakeholder-management skills
- Ability to work effectively in a hybrid team environment and be onsite in Chicago three days per week
Desired Qualifications
- Experience working with payer, provider, health insurance, Medicare, Medicaid, or other healthcare claims platforms
- Experience with HIPAA-related claims-processing requirements and healthcare data controls
- Familiarity with Agile delivery methodologies, Jira, ServiceNow, or similar work-management and incident-management tools
- Experience with mainframe production-support models, including on-call support and incident triage
- Prior experience mentoring developers or serving as a technical lead on mainframe development initiatives
- Experience with testing tools or methodologies for mainframe applications, batch jobs, and EDI claims-processing interfaces
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