Senior Mainframe Modernization & Integration Software Engineer – On-site
We are seeking a Senior Mainframe Modernization & Integration Software Engineer to design, develop, maintain, support, and modernize enterprise applications that enable critical GM business operations. In this role you will develop solutions that drive innovation and help the business remain competitive, while ensuring reliability and continuity of essential systems.
Key Responsibilities
- Design and develop enterprise-grade mainframe and integrated applications.
- Maintain and support production systems to ensure high availability for critical business operations.
- Lead and execute modernization efforts to evolve legacy systems and integrate them with enterprise platforms.
- Troubleshoot and resolve complex technical and operational issues.
- Collaborate with cross-functional teams to deliver integrated solutions that meet business requirements.
- Document designs, changes, and operational procedures to support ongoing maintenance and knowledge transfer.
What Success Looks Like
- Stable, well-supported enterprise applications that meet business SLAs.
- Practical modernization outcomes that reduce risk and improve maintainability.
- Effective integrations between mainframe systems and other enterprise platforms, enabling seamless business processes.
- Clear documentation and operational readiness for supported systems.
Role Context
This senior engineering position focuses on both sustaining critical mainframe capabilities and delivering modernization and integration initiatives that enable GM’s business operations to remain competitive and innovative.
If you have expertise in designing, developing, supporting, and modernizing mission-critical enterprise applications and enjoy working on cross-functional integration efforts, this role offers an opportunity to make a measurable impact on core business systems.

