Senior Mainframe Developer — Remote & Modernization

Infinite Computer Solutions; Indiana; Remote; USD 100,000 - 130,000; Full time

Benefits offered by this job

Remote work flexibility

Job summary

Thoriva is seeking a Senior Mainframe Application Developer to design, develop, and maintain enterprise mainframe systems, supporting mission-critical operations. You will work hands-on with batch and online programs (CICS) and participate in testing, production support, and modernization initiatives.

The role emphasizes IBM z/OS expertise, collaboration across cross-functional teams, and potential use of AI-enabled tools to accelerate delivery and documentation.

Qualifications

• 10+ years hands-on mainframe development experience (flexible for strong candidates).
• Proficiency in COBOL, JCL, DB2, and VSAM.
• Experience with CICS and/or IMS.
• Experience developing and supporting both batch and online applications.
• Familiarity with mainframe development and debugging tools such as Expeditor, Intertest, Endeavor, or Changeman.
• Experience in production support environments.
• Strong problem-solving, troubleshooting, and communication skills.
• Ability to work independently with minimal ramp-up.
• Excellent communication skills (written and verbal).

Responsibilities

• Design, develop, enhance, and maintain mainframe applications using COBOL.
• Develop and support batch and online programs (CICS).
• Write and maintain JCL, manage job scheduling, and support batch cycles.
• Develop and maintain integrations with DB2, VSAM, and other mainframe data sources.
• Perform unit testing, system testing, and UAT support.
• Troubleshoot production issues and provide production support.
• Participate in requirements analysis and translate business needs into technical solutions.
• Collaborate with cross-functional teams including analysts, testers, and infrastructure teams.
• Follow established SDLC, change management, and release processes.
• Support documentation, knowledge transfer, system modernization initiatives, and continuous improvement as applicable.

Skills

COBOL

JCL

DB2

VSAM

CICS

IMS

Batch processing

Online applications

Communication

Education

Bachelor's degree or higher

Tools

Expeditor

Intertest

Endeavor

Changeman

Job description

Thoriva is seeking a Senior Mainframe Application Developer to design, develop, and maintain enterprise mainframe systems, supporting mission-critical operations. You will work hands-on with batch and online programs (CICS) and participate in testing, production support, and modernization initiatives.

The role emphasizes IBM z/OS expertise, collaboration across cross-functional teams, and potential use of AI-enabled tools to accelerate delivery and documentation.