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# Sr Mainframe developer/Lead Mainframe developer

- **Company:** iMedhas Consulting Services
- **Location:** Westlake Village, CA, United States
- **Experience:** Expert
- **Salary:** $104,000.0
- **Contract:** Temporary contract
- **Skills:** Application Programming Interfaces (APIs), Customer Information Control System (CICS), Cloud Computing, COBOL (Programming Language), Code Review, IBM DB2, Software Debugging, Embedded SQL, Job Control Language (JCL), IBM Mainframe, IBM WebSphere MQ, Mainframes, Performance Tuning, Software Engineering, SQL Stored Procedures, Systems Integration, Transaction Processing (Computing), System Availability, File-aid, Low Latency, Data Management, Restful APIs
- **Published:** July 3, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=e7bfed2fd0227bc5

## About the Role

* 8+ years of professional experience in IBM Mainframe software engineering.
 * Proven track record in high-volume, transactional environments (e.g., Financial Services, Healthcare, Logistics, or Insurance).
 * Skill Matrix
 * Domain: Languages
 * Required Tooling and Concepts: Enterprise COBOL, JCL, Embedded SQL, Assembler/EZTrieve is a plus
 * Domain: Online Processing
 * Required Tooling and Concepts: CICS BMS Maps, TS/TD Queues, Program Control, Intercommunication
 * Domain: Data Management
 * Required Tooling and Concepts: DB2 Relational design

## Description

* Design, write, test, and implement complex, highly secure batch and online programs utilizing enterprise COBOL within IBM zOS environments.
 * Transaction Processing - CICS
 * Architect and optimize online CICS applications to ensure ultra-low latency, optimal screen data layouts, high-volume throughput, and robust error-handling protocols.
 * Database Management - DB2
 * Design efficient relational tables, write high-performance embedded SQL statements, and optimize DB2 store procedures, indexes, and queries to eliminate processing bottlenecks.
 * Batch Architecture and JCL
 * Manage, write, and optimize complex JCL (Job Control Language) streams, utilities (IEBGENER, IDCAMS, SORT), and automated batch scheduling systems.
 * Performance Tuning and Debugging
 * Perform advanced root-cause analysis, system tracing, and performance tuning using tools like Dump Analysis, Xpediter, InterTest, or File-AID to maintain high availability.
 * Systems Integration and API Enablement
 * Partner with Cloud and Integration Architects to expose core mainframe data and transactional logic to modern RESTful APIs via zOS Connect or MQ Series.
 * Technical Stewardship
 * Define and enforce coding standards, lead rigorous code reviews, and maintain comprehensive documentation for legacy architectures.


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