Mainframe Programmer
1 day ago
Role : Mainframe Assembler Programmer
Experience : 5 to 12 Years
Location : Hyderabad,Bangalore
Notice period : Immediate to serving 30 Days
Job Summary
We are seeking an experienced
Mainframe Assembler Programmer
to design, develop, optimize, and maintain high-performance system-level and application-level components on IBM z/OS. The role involves working with low-level Assembler (HLASM), debugging complex system routines, integrating with COBOL/PL1 applications, and supporting mission-critical mainframe workloads.
Key Responsibilities
- Develop, modify, and maintain
Assembler (HLASM)
programs running on z/OS. - Analyze and optimize
high-performance, low-level system routines
. - Work with
system exits, control blocks (TCB, PSA, RCB, CVT, JCT, SCT, etc.)
, and OS interfaces. - Support and enhance
batch and online (CICS) programs
written in Assembler. - Write and maintain
JCL
, PROC, PARMLIB updates, and job streams. - Debug complex issues using
IBM Debug Tool, IPCS, Abend-AID, Fault Analyzer
. - Integrate Assembler modules with
COBOL, PL/I, and C/C++
components. - Develop and maintain
macro instructions
, parameter libraries, and reusable code blocks. - Work with
VSAM
, BDAM, and low-level I/O routines. - Fix performance issues using:
- storage optimization
- instruction-level tuning
- register management
- minimizing supervisor calls
- Collaborate with mainframe systems programmers, application developers, infrastructure teams.
- Prepare technical documentation and participate in code reviews
-
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