Software Engineer III (Mainframe Assembler(HLASM)- z/OS Security & Systems (zAssure Portfolio)

Rocket Software, Inc.; Pune District; Hybrid; INR 1,200,000 - 2,000,000; Full time

Job summary

Rocket Software, Inc. is looking for a Mainframe Engineer to join the zAssure Security Portfolio team in India. This highly specialized role demands a strong foundation in z/OS internals, HLASM, and system-level debugging.

The successful candidate will design and maintain HLASM-based components, troubleshoot complex issues, and collaborate with global teams, contributing significantly to our security solutions.

Rocket Software is committed to diversity and inclusion in the workplace.

Qualifications

• Minimum 10 years of experience in z/OS environments.
• Strong expertise in HLASM (Assembler).
• Hands-on experience with JCL, ISPF, and SDSF.

Responsibilities

• Design and maintain HLASM components for z/OS security.
• Diagnose complex issues using z/OS diagnostic tools.
• Collaborate with engineering and support teams.

Skills

z/OS internals

HLASM (Assembler)

Batch job debugging

System diagnostics

Git

Problem-solving

Tools

JCL

ISPF

SDSF

GTF traces

Job description

It’s fun to work in a company where people truly BELIEVE in what they’re doing! Rocket Software is seeking a Mainframe Engineer to join the zAssure Security Portfolio team. This role focuses on deep system‑level engineering, security analysis, and advanced diagnostics within z/OS environments. This is a highly specialized role requiring strong expertise in z/OS internals, HLASM (Assembler), and system‑level debugging. The role combines product engineering with complex troubleshooting and customer‑facing escalation support, making it critical to the success of our security solutions.

Key Responsibilities

• Design, develop, and maintain HLASM‑based components for z/OS security and system tooling (VAP and related products)
• Diagnose complex issues using z/OS diagnostic tools (including GTF traces)
• Analyze APF‑authorized programs, SVCs, PC routines, and system behavior
• Perform deep root cause analysis for performance, system failures, and security exposures
• Work with JCL, ISPF, SDSF, and system utilities to debug and validate behavior
• Collaborate with engineering and support teams on L3 escalations and product fixes
• Contribute to tooling, automation, and modernization efforts
• Apply modern development practices (Git, AI‑assisted debugging/workflows)

Required Qualifications

• Minimum 10 years of experience in z/OS environments
• Strong expertise in:
  • HLASM (Assembler)
  • z/OS internals (mandatory)
• Hands‑on experience with:
  • JCL, ISPF, SDSF
  • Batch job debugging and system diagnostics
• Proven experience in:
  • Collecting and analyzing GTF traces (required)
  • Debugging low‑level system issues
• Strong understanding of:
  • APF authorization, SVC, PC, memory and execution model
  • z/OS security concepts (RACF awareness)
• Experience with Git or modern version control
• Strong problem‑solving, debugging, and analytical skills

Highly Desirable

• REXX scripting experience
• Knowledge of system exits, hooks, and intercepts
• Performance tuning and advanced diagnostics
• Exposure to DB2, VSAM, or system‑level data structures
• Experience supporting customer escalations / L3 roles

Work Model

Collaborate with global (US‑based) teams. Flexibility for overlapping time zones when required. Operate with high ownership and minimal supervision.

Rocket Software Inc. is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. Rocket Software Inc. is also committed to compliance with all fair employment practices regarding citizenship and immigration status. As part of our commitment to a safe and trustworthy workplace, we include background and reference checks in our hiring process. Rocket is committed to working with and providing reasonable accommodation to individuals with physical and mental disabilities. If you need special assistance or an accommodation while seeking employment, please call 781‑577‑4321 or send an email to [e-mail]. We will make a determination on your request for reasonable accommodation on a case‑by‑case basis.