IBM Mainframe z/OS assembler developer/Architect-100% Remote

Jobs via Dice; Bethesda (MD); Remote; USD 70,000 - 105,000; Full time

Job summary

A leading company in software development is seeking an Assembler Developer for a remote position based in Bethesda, MD. This role requires expertise in IBM z/OS assembly language and involves the modernization of legacy systems, focusing on IRS mission-critical applications. The successful candidate will analyze legacy code, extract business rules, and contribute to code conversions while working collaboratively with cross-functional teams. Applicants should possess a Bachelor's degree in Computer Science and extensive knowledge of mainframe environments.

Qualifications

• Bachelor's degree in Computer Science or related field required.
• In-depth knowledge of assembly language and IBM z/OS.
• Experience with IRS Core Record Layouts (CRL) highly desirable.

Responsibilities

• Analyze and enhance legacy code in IBM z/OS assembly language.
• Extract business rules and assist in code conversion.
• Collaborate with teams on data processing and legacy logic migrations.

Skills

IBM z/OS assembly language

Business rules extraction

Code modernization

Data processing

Version control with CA Endevor

Job scheduling with BMC Control-M

Java programming

Education

Bachelor's degree in Computer Science

Tools

CA Endevor

BMC Control-M

Job description

1 day ago Be among the first 25 applicants

Dice is the leading career destination for tech experts at every stage of their careers. Our client, Cleo Consulting Inc., is seeking the following. Apply via Dice today!

Job ID: 148581

Job Title: Assembler Developer- 100% Remote

Job Location: Bethesda, MD

Projecte Duration:- 4 Years

100% Remote

Job Description

• We are seeking a highly experienced Assembly Language Developer with deep expertise in IBM z/OS mainframe environments, IRS Core Record Layouts (CRL), and legacy system modernization. The ideal candidate will support the extraction of business rules from legacy code, assist in code conversion to modern platforms, and work with mission-critical IRS systems such as the Individual Master File (IMF) and Business Master File (BMF).
  
  

Key Responsibilities:

• Analyze, maintain, and enhance legacy code written in IBM z/OS assembly language.
• Extract business rules from existing assembly code and assist in code conversion efforts.
• Work with IRS Core Record Layouts (CRL) and QSAM data formats to support data processing and transformation.
• Collaborate with cross-functional teams to ensure accurate interpretation and migration of legacy logic.
• Utilize CA Endevor Software Change Manager (SCM) for version control, release management, and secure code handling.
• Leverage BMC Control-M for job scheduling, workflow automation, and monitoring batch job execution.
  
  

Required skills/Level of Experience:

• Bachelor's degree in Computer Science, Information Systems, or a related field.
• In-depth knowledge of IBM z/OS assembly language, including:
• Assembly instructions, addressing modes, and data manipulation techniques
• Job control processing and JCL
• Familiarity with IBM mainframe architecture, including:
• Storage hierarchy (registers, memory, I/O)
• System calls (SVCs) and interrupt handling
• Experience with IRS Core Record Layouts (CRL) and QSAM/VSAM data formats (highly desirable).
• Experience with IRS IMF or BMF systems (highly desirable).
• Proficiency with CA Endevor SCM for secure and controlled software development lifecycle management.
• Experience with BMC Control-M for job automation and workflow orchestration.
• Strong understanding of mainframe development tools, including debuggers, assemblers, linkers, and utilities.
• Familiarity with DB2 and other legacy data storage formats.
• Understanding of Java programming, including:
• Object-oriented principles, syntax, libraries, and frameworks
• Ability to map assembly logic to Java constructs (loops, conditionals, functions, design patterns)
  
  

Cleo Consulting is an equal opportunity employer (Minorities/Women/Veterans/Disabled)

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Management and Manufacturing

• Industries

  Software Development

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