Principal Software Engineer - Mainframe Modernization

Job Description

The Role

General Motors is seeking a Principal Software Engineer to provide technical leadership and architectural direction for enterprise-scale mainframe modernization initiatives, guiding the evolution of mission-critical systems toward modern, scalable, SaaS-focused architectures. This role requires deep understanding of legacy mainframe platforms combined with expertise in modern distributed systems, cloud-native architectures, and incremental, value-driven migration strategies. 

The successful candidate will define modernization roadmaps, evaluate migration approaches, ensure transactional integrity and operational resilience, and partner closely with IT, operations, and business stakeholders to deliver long term transformation. In addition, the successful candidate will be expected to provide architectural guidance, conduct hands-on design/code reviews, and mentor technical talent across multiple teams.

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