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Freelance Mainframe Applications Developer Jobs in Ohio

Mainframe DB2 Developer

Columbus, OH · On-site

$47.25 - $60.75/hr

Mainframe DB2 Developer Location: Columbus, OH (100% Onsite from Day 1) Experience: 10+ Years Roles ... Design, develop, enhance, and maintain mainframe applications using COBOL, JCL, and DB2. * Perform ...

Mainframe Developer

Columbus, OH · On-site

$47.25 - $60.75/hr

Job Title Mainframe Developer - DB2 & CICS Location Columbus, OH Experience 6-8 Years Job Overview ... The ideal candidate will support and enhance enterprise mainframe applications, ensuring stability ...

ITTConnect is seeking a Senior Mainframe Developer (zOS Environment) to work on site for a client ... mainframe applications are being API-enabled and integrated into an AI-driven utility platform. You ...

Cobol Developer

Columbus, OH · On-site

$48.50 - $65.75/hr

The role involves developing and maintaining complex mainframe applications, leveraging expertise in COBOL and other related technologies to support mission-critical systems. Responsibilities : • ...

New

Application Senior Developer

Columbus, OH · On-site

$92.70K - $127.50K/yr

Responsibilities : • Develop, code, test, and debug mainframe applications using COBOL, JCL, DB2, VSAM, and CICS. • Collaborate with cross-functional teams to gather and analyze system ...

New

Application Senior Developer

Columbus, OH · On-site

$92.70K - $127.50K/yr

The role involves developing and maintaining complex mainframe applications, leveraging expertise in COBOL, JCL, DB2, VSAM, and CICS to support mission-critical systems while ensuring high-quality ...

New

Cobol Developer

Columbus, OH · On-site

$48.50 - $65.75/hr

Develop, code, test, and debug mainframe applications using COBOL, JCL, DB2, VSAM, and CICS. * Collaborate with cross-functional teams to gather and analyze system requirements. * Ensure application ...

New

Mainframe Developer

Cleveland, OH · On-site

$110K - $115K/yr

Mainframe Developer Role: Mainframe Developer Location: Cleveland, USA Full Time Skill: COBOL Visa ... complex applications and data relationships Excellent interpersonal and communication skills ...

Mainframe Developer

Columbus, OH · On-site

$47.25 - $60.75/hr

Design, develop, and maintain applications using COBOL, JCL, DB2, and CICS on IBM Mainframe systems ... Strong programming skills in COBOL, JCL, DB2, and CICS . * Experience in System z platform and CICS ...

Mainframe Developer

Cleveland, OH · On-site

$47.50 - $61/hr

Local Preferred We are seeking a skilled Mainframe Application Support Engineer with strong ... Provide production support (L2/L3) for applications running on Mainframe technologies. * Develop ...

Mainframe Developer

Cleveland, OH · On-site

$47.50 - $61/hr

Local Preferred We are seeking a skilled Mainframe Application Support Engineer with strong ... Provide production support (L2/L3) for applications running on Mainframe technologies. * Develop ...

Senior Java Developer

Columbus, OH · On-site +1

$55.25 - $70.50/hr

Exposure to mainframe systems and applications, particularly DB2, with an understanding of ... CI/CD, and DevOps tooling. Professional Skills: Strong analytical, problem-solving, and ...

Software Engineer

Columbus, OH · Hybrid

$53 - $57/hr

Job Title Senior Software Engineer - Mainframe (Hogan / Batch Automation) (Lead-level candidates ... Design, develop, test, and maintain mainframe applications using COBOL, JCL, and SQL . * Support ...

Mainframe Developer

Cleveland, OH · On-site

$47.50 - $61/hr

Role: Mainframe Developer Skills: Collaboration~Communication~Mainframe DB2 - Application ... Develop| test| and maintain applications using COBOL| JCL| VSAM| and DB2.Perform enhancements| bug ...

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Freelance Mainframe Applications Developer information

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Infographic showing various Freelance Mainframe Applications Developer job openings in Ohio as of May 2026, with employment types broken down into 3% Internship, 28% Full Time, 27% Part Time, and 42% Contract. Highlights an 82% In-person, and 18% Remote job distribution.

Mainframe DB2 Developer

Prophecy Technologies

Columbus, OH • On-site

$47.25 - $60.75/hr

Full-time

Posted 27 days ago


Job description

Role Name: Mainframe DB2 Developer
Location: Columbus, OH (100% Onsite from Day 1)
Experience: 10+ Years
Roles & Responsibilities:
  • Design, develop, enhance, and maintain mainframe applications using COBOL, JCL, and DB2.
  • Perform DB2 application development including SQL coding, stored procedures, and database interactions.
  • Optimize, tune, and debug complex mainframe applications for performance and reliability.
  • Analyze business and technical requirements and translate them into scalable mainframe solutions.
  • Support production cycles, resolve incidents, perform impact analysis, and root cause analysis.
  • Work closely with system analysts, QA teams, and stakeholders for end-to-end delivery.
  • Develop batch and online programs using Enterprise COBOL on System Z.
  • Create and maintain JCL scripts to manage batch processes.
  • Participate in code reviews, testing cycles, and deployment activities.
  • Ensure compliance with coding standards, security requirements, and documentation best practices.

Competencies:
  • Strong analytical and problem-solving skills
  • Deep expertise in mainframe DB2 application development
  • Ability to troubleshoot complex mainframe issues quickly
  • Strong understanding of mainframe architecture and job processing
  • Excellent communication and teamwork skills
  • Ability to work onsite in a fast-paced environment

Required Technical Skills:
  • Mainframe DB2 - Application Development
  • System Z - Enterprise COBOL
  • System Z - JCL
  • Strong SQL, stored procedures, and performance tuning
  • Debugging tools and mainframe utilities (File-Aid, Abend-Aid, etc.)
  • Experience with batch and online processing

Must-Have Qualifications:
  • 10+ years of hands-on experience in mainframe development
  • Strong expertise in COBOL, JCL, and DB2
  • Proven experience in System Z - Enterprise COBOL
  • Ability to work 100% onsite from Day 1 in Columbus, OH
  • Experience supporting large-scale mainframe applications