IT Mainframe Developer
Location: 100% REMOTE
Visa Type: Citizens / / H1B1
Contact: /
Contact Name: Sri
Role Overview
The IT Mainframe Developer designs, develops, enhances, maintains, and supports enterprise applications running on mainframe platforms. The role focuses on delivering reliable, secure, and high-performing solutions for critical business systems, often supporting banking, insurance, retail, healthcare, manufacturing, or other large-scale enterprises.
Key Responsibilities
- Design, develop, test, debug, and maintain mainframe applications.
- Develop and enhance applications using COBOL, JCL, CICS, DB2, and VSAM.
- Analyze business and technical requirements and translate them into application solutions.
- Perform application coding, unit testing, integration testing, and production implementation.
- Troubleshoot production issues and perform root-cause analysis.
- Optimize application performance, batch processing, and database operations.
- Develop and maintain JCL jobs, procedures, utilities, and batch processes.
- Work with DB2 databases, including SQL development, data access, and performance optimization.
- Develop and support CICS online transaction-processing applications.
- Maintain interfaces between mainframe applications and distributed/cloud systems.
- Participate in application modernization, migration, and integration initiatives.
- Perform impact analysis for system enhancements and changes.
- Prepare technical specifications, design documentation, test plans, and deployment documentation.
- Follow SDLC, change-management, security, and IT governance standards.
- Collaborate with business analysts, architects, QA teams, infrastructure teams, and other developers.
- Participate in production support and on-call rotations, where required.
Core Technical Skills
Technology | Typical Requirement |
COBOL | Application development |
JCL | Batch processing/job control |
DB2 | Database & SQL |
CICS | Online transaction processing |
VSAM | File/data management |
z/OS | Mainframe operating system |
TSO/ISPF | Mainframe development environment |
Endevor / ChangeMan | Source & change management |
Git / CI/CD | Increasingly used in modernization |
REXX | Scripting/automation |
MQ | Enterprise messaging |
CA7 / Control-M | Job scheduling |
Mainframe Development Lifecycle
Requirements → Design → COBOL/JCL Development → DB2/CICS Development → Unit Testing → Integration Testing → QA → Production Deployment → Production Support
Qualifications
- Bachelor's degree in Computer Science, Information Technology, Engineering, or related field.
- Typically 5+ years of mainframe development experience for a senior position.
- Strong experience with COBOL, JCL, DB2, and CICS.
- Experience with SDLC and enterprise application development.
- Strong troubleshooting and analytical skills.
- Experience working with production-critical applications.
- Strong communication and collaboration skills.
Senior Mainframe Developer
For a Senior IT Mainframe Developer, employers commonly expect additional experience with:
- Complex COBOL application architecture
- DB2 performance tuning
- CICS transaction optimization
- Large-scale batch processing
- Production incident management
- Application modernization
- Mainframe-to-cloud integration
- API and distributed-system integration
- Technical leadership and mentoring
- Code reviews and development standards
- Migration/conversion projects
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