Mainframe Developer (Senior)

Location: Chicago, IL
Employment type: Full-time
Work model: Hybrid — 3 days onsite per week

About The Role

Globant is seeking an experienced Mainframe Developer to support a client’s healthcare claims technology environment. This role will serve as a technical lead and subject matter expert for mainframe-based claims adjudication applications, contributing to production support, system enhancements, complex defect resolution, and modernization-related initiatives. The ideal candidate has strong hands-on mainframe development experience, deep knowledge of healthcare claims processing, and the ability to partner with business and technology stakeholders to deliver reliable, compliant, and scalable solutions.

Responsibilities

• Serve as a technical lead and subject matter expert for mainframe-based healthcare claims adjudication systems.
• Analyze, design, develop, test, and implement complex fixes, enhancements, and maintenance updates for claims-processing applications.
• Develop and maintain applications using COBOL, DB2, VSAM, JCL, and CICS.
• Investigate and resolve critical production incidents, application defects, performance issues, batch-processing failures, and functional issues.
• Perform root cause analysis for recurring production issues and recommend sustainable corrective or preventive actions.
• Support mainframe system upgrades, application enhancements, releases, and integration activities.
• Partner with business analysts, product owners, and operational stakeholders to translate healthcare claims requirements and regulatory updates into detailed technical designs and development solutions.
• Participate in code reviews and enforce established client coding, security, documentation, and quality standards.
• Use mainframe debugging and analysis tools, such as Xpediter, File-AID, and Abend-AID, to diagnose and resolve complex issues.
• Collaborate with application development, QA, infrastructure, database, and production-support teams to ensure smooth integration and delivery.
• Create and maintain technical designs, process documentation, support procedures, runbooks, and knowledge-transfer materials.
• Mentor junior developers and provide technical guidance on mainframe development standards, claims-processing logic, debugging, and production support.
• Support compliance requirements by maintaining accurate documentation, traceability, and appropriate controls for application changes.

Requirements

• 6–9 years of hands-on mainframe application development experience.
• Strong development experience with:
  • COBOL.
  • DB2.
  • VSAM.
  • JCL.
  • 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.

Preferred 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.

What You’ll Bring

• Strong ownership of complex application issues from analysis through production resolution.
• A quality-focused approach to design, coding, testing, documentation, and production support.
• The ability to balance urgent production priorities with sustainable engineering solutions.
• Clear communication skills for working across business, healthcare operations, and technical delivery teams.
• A collaborative mindset and willingness to mentor team members while helping improve engineering and support practices.

Pay

Salary Range: 95,000–115,000 annually