Mainframe Developer

Job Title: Senior Mainframe Developer
Location: New York City, NY/ Jersey City, NJ - 4 Days onsite role
Fulltime (FTE) Role - Only visa independent candidate (OPT will also Work)
Experience: Need only (6-10 Years)



Role Overview: We are seeking a Senior Mainframe Developer with strong expertise in COBOL, JCL, and Control-M/CCS (or similar scheduling systems) to support critical enterprise applications. The role involves code screening, analysis/scraping, enhancement, and development on legacy mainframe systems, along with participation in modernization and integration efforts.
This individual will play a key role in maintaining high-performance, stable mainframe applications while contributing to system improvements and integration initiatives.



Key Responsibilities

• Perform code screening, analysis, and scraping of existing mainframe applications to identify dependencies, inefficiencies, and improvement opportunities
• Design, develop, test, and maintain COBOL-based applications
• Develop and manage JCL jobs, including batch processing and scheduling workflows
• Work with CCS / Control-M / enterprise scheduling systems for job automation and monitoring
• Analyze legacy code and contribute to modernization strategies
• Collaborate with cross-functional teams to support integration with distributed systems or APIs
• Troubleshoot production issues, identify root causes, and implement fixes
• Ensure adherence to coding standards, performance guidelines, and security practices
• Document technical specifications, code changes, and system workflows
• Support QA/UAT cycles and deployment activities

Required Skills & Qualifications

• 8+ years of experience in Mainframe development
• Strong hands-on experience with:
  • COBOL
  • JCL (Job Control Language)
  • Mainframe utilities (VSAM, DB2, CICS - as applicable)
• Experience with CCS / Control-M / similar job scheduling tools
• Experience with DB2, CICS transaction processing
• Proven experience in code analysis, reverse engineering, and refactoring legacy systems
• Strong debugging and problem-solving skills
• Familiarity with batch processing and high-volume transaction systems
• Ability to work independently and in a team-oriented environment

Nice-to-Have Skills

• Basic understanding of system integration concepts (APIs, middleware, web services)
• Exposure to mainframe modernization initiatives
• Familiarity with distributed systems or cloud integration
• Knowledge of DevOps practices for mainframe environments

About ApTask:
ApTask is a leading global provider of workforce solutions and talent acquisition services, dedicated to shaping the future of work. As an African American-owned and Veteran-owned company, ApTask offers a comprehensive suite of services, including staffing and recruitment solutions, managed services, IT consulting, and project management. With a focus on excellence, collaboration, and innovation, ApTask provides unparalleled opportunities for professional growth and development. As a member of the ApTask team, you will have the chance to connect businesses with top-tier professionals, optimize workforce performance, and drive success across diverse industries. Join us at ApTask and be part of our mission to empower organizations to thrive while fostering a diverse and inclusive work environment.

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