Mainframe Developer

Location: Westlake, TX (Onsite)

Mode: Contract

Core Responsibilities

• Application Development and Engineering 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.

Required Technical Stack and Experience:

• Experience 8 plus 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 Required Tooling and Concepts Languages Enterprise COBOL, JCL, Embedded SQL, Assembler/EZTrieve is a plus Online Processing CICS BMS Maps, TS/TD Queues, Program Control, Intercommunication Data Management DB2 Relational design, .