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# Application Developer (Assembler)

- **Company:** PLANIT GROUP
- **Location:** Potomac, MD, United States (Remote available)
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Assembly Language, IBM DB2, Software Debugging, Programming Tools, Endevor, IBM Mainframe, Job Scheduling, Object-Oriented Software Development, Release Management, Software Engineering, System Programming, Virtual Storage Access Methods, Z/OS, Data Processing, Software Version Control, Control M
- **Published:** November 5, 2026
- **Apply:** https://www.careerbuilder.com/job-details/application-developer-assembler-rockville-md--ca3ee76d-11be-49b6-8394-bfde44b4310b

## About the Role

Software Development, Software Development, Testing, Project/Program Management, Willing to Travel, Business Plan, Technical Support, Process Improvement, IBM z-OS Operating System, Assembly Language, * Bachelor's degree

 * In-depth knowledge of IBM z/OS assembly language: This includes understanding assembly instructions, addressing modes, data manipulation techniques, and job control processing. Will provide support with legacy code business rules extraction and code conversion.
 * Familiarity with IBM mainframe architecture: Grasp of concepts like storage hierarchy (registers, memory, I/O), system calls (SVCs), and interrupt handling mechanisms.
 * Knowledge of CA Endevor Software Change Manager (SCM) tool - including version control, release management, security and access control, and integration of Endevor with other development tools.
 * Knowledge of BMC Control-M - specifically with respect to automating job scheduling, managing workflows, and monitoring job execution.
 * Understanding of mainframe tools: Experience with debuggers, assemblers, linkers, and utilities specific to the IBM z/OS mainframe environment.
 * In-depth knowledge of legacy mainframe data formats: This includes experience with DB2, QSAM, VSAM data formats.
 * Understanding of target Java code: Candidate should understand object-oriented programming principles, Java syntax, libraries, frameworks, and best practices and can translate assembly logic to modern constructs such as mapping assembly instructions to equivalent Java code using loops, conditional statements, functions, and object-oriented design patterns.
 * Active IRS MBI Clearance High Desirable
 * Experience with IRS Core Record Layout (CRL), QSAM Data Formats highly desirable.
 * Experience with IRS Individual Master File (IMF) or Business Master File (BMF) highly desirable.

## Description

lanIT Group is seeking (3) Application Developers (Assembler) to support our Federal customer in the Washington, DC area. The ideal candidate will provide support and assistance to design, development, integrate, test, and deploy a modernized BMF platform and support day-to-day Operations & Maintenance (O&M) work based on IRS priorities. Provide for project management, O&M, development, modernization, enhancements, software development, legislative changes, and developmental O&M upgrades., Provide support and assistance to design, development, integrate, test, and deploy a modernized BMF platform and support day-to-day Operations & Maintenance (O&M) work based on IRS priorities. Provide for project management, O&M, development, modernization, enhancements, software development, legislative changes, and developmental O&M upgrades.