Application Development; Mainframe Systems

Job Title:

ON‑SITE - Application Developer (Mainframe Systems) – 21540

Location:

2 Broadway, New York, NY 10004

Duration: 12 months

• Develop, enhance, and maintain legacy mainframe applications.
• Design and implement new application features.
• Provide application maintenance and production support.
• Troubleshoot and resolve complex production issues.
• Perform routine system maintenance and performance optimization.
• Support mission‑critical business applications and daily operations.
• Manage batch processing and interface workflows.
• Integrate data across upstream and downstream systems.
• Extract and prepare operational data for enterprise data lake.
• Support operational and regulatory reporting requirements.
• Ensure accurate, reliable, and seamless data flow across systems.
• Document business processes, workflows, and system integrations.
• Participate in modernization and large‑scale data migration initiatives.
• Provide technical knowledge transfer to IT teams and project stakeholders.
• Maintain high system reliability, availability, and business continuity.

Agency: MTA (Metropolitan Transportation Authority)

Detailed

Job Description:

The Application Developer (Mainframe Systems) will be responsible for enhancing and maintaining legacy enterprise applications while ensuring the stability, reliability, and performance of mission‑critical mainframe systems. The role involves new feature development, production support, troubleshooting, batch processing, data integration, interface management, and operational reporting. The developer will also support system modernization initiatives, data migration efforts, process documentation, and knowledge transfer while ensuring seamless business operations and accurate data flow across enterprise systems.