Haystack
← Back to Jobs
Other

Application Development (Mainframe Systems) - 5742-1

GreyCell Labs, IncNew York, NY🇺🇸United StatesPosted 9 Jul 2026

Quick Overview

Work Type
On Site
Level
Mid Senior

Job Description

Job Title: ON-SITE - Application Developer (Mainframe Systems)- 21540  

Location:  2 Broadway, New York, NY 10004  

Duration: 12 Months

Job Description:   

  • 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. 

Note: Sorry we do not Sponsor  Visa  
Max: SEVEN 32.800.2838  

Aryan: - SEVEN 32.800.2373 

Skills

Regulatory Reporting

Similar jobs