Mainframe Software Engineer (Assembler/C)

PKWARE is seeking a

Mainframe Software Engineer

with deep expertise in

Assembler (HLASM)

and

C

programming within IBM z/OS environments. You will design, develop, and maintain

enterprise-grade mainframe software solutions , ensuring

high performance, reliability, and security .

Key Responsibilities Develop, enhance, and maintain applications on

IBM z/OS

using

Assembler, C, JCL, REXX , and related technologies. Participate in the full SDLC: requirements analysis, design, coding, testing, and production support. Optimize performance, troubleshoot defects, and ensure system reliability. Collaborate with cross-functional teams (System Engineers, QA, DevOps, Business Stakeholders). Maintain technical documentation, coding standards, and operational procedures. Support legacy systems while contributing to modernization efforts.

Required Qualifications 5+ years

of programming experience in: Assembler / HLASM

(on z/OS) C

(on z/OS) Comprehensive expertise in IBM subsystems and z/OS internals: cross-memory services, SRB management, Program Call routines, interlanguage communication (Assembler, Java, C, REXX). Extensive experience in

APF-authorized code development

and secure, high-performance system-level modules. Expert-level proficiency in

HLASM

and z/OS system macros for program management, storage, synchronization, recovery, and messaging. Skilled in subsystem interfaces and exits integrating with JES, SMF, and core components. Advanced debugging using

XDC, IPCS, dump analysis

for complex system issues. Familiarity with Sysplex communication using

XCF macros . Experience with Agile/Scrum methodologies for mission-critical software delivery.

Preferred Skills Knowledge of

Zowe, z/OSMF, RESTful APIs , modernization/integration projects. Strong Java development skills (JZOS, JNI, batch-mode applications). Familiarity with

ICSF, RACF , SMP/E packaging, SBOM compliance (CycloneDX/SPDX).

Education Bachelor’s degree in computer science, software engineering, IT, or equivalent experience.

What We Offer Competitive salary and benefits. Opportunity to work on mission-critical enterprise systems. Professional growth and training on modern mainframe and hybrid cloud technologies. Collaborative and inclusive work environment.

About PKWARE PKWARE delivers the only data discovery and protection solution that locates and secures sensitive data across any device or environment. Our scalable software enables precise, automated visibility and control of personal data—even in the most complex IT environments. With

1,200+ customers , including leading financial institutions, retailers, healthcare organizations, and government agencies, PKWARE is an award-winning global leader in data security and compliance. Learn more at PKWARE.com.