Principal Platform Engineer

Fifth Third Bank

Principal Platform Engineer at Fifth Third Bank, evaluating, designing, and implementing technology solutions with a focus on mainframe system performance and capacity planning.

Posted 6/27/2026full-timeRemote • Missouri, Ohio • 🇺🇸 United StatesLead💰 $96,500 - $207,500 per yearWebsite

Tech Stack

Tools & technologies

Python

About the role

Key responsibilities & impact

Evaluate, design and implement technology solutions to build and progress technology strategies with a line of business
Be the application owner responsible for third party, purchased software aligned with a LOB
Work with vendor to understand upcoming changes
Design plans to ensure business continuity and effectiveness
Monitor, analyze, and tune mainframe system performance (CPU, memory, I/O, workloads)
Identify performance bottlenecks and implement corrective actions
Analyze SMF/RMF data to provide actionable insights and recommendations
Optimize WLM policies and service class definitions to align with business priorities
Develop and maintain capacity models to predict future demand and growth
Perform trend analysis and forecasting for CPU, DASD, and throughput requirements
Collaborate with engineering and business teams to align capacity plans with strategic initiatives
Support hardware upgrades, LPAR sizing, and infrastructure scaling decisions
Perform z/OS system programming tasks including installation, configuration, and maintenance
Tune system parameters (PARMLIB, JES2, WLM, SRM) for performance optimization
Support and enhance system automation and health monitoring
Maintain system software including SMP/E maintenance, patching, and upgrades
Troubleshoot system-level issues impacting performance and availability
Utilize performance tools such as RMF, SMF, OMEGAMON, or equivalent
Generate reports and dashboards to communicate performance metrics to stakeholders
Develop scripts or automation (REXX, Python, or similar) to improve efficiency
Follow industry and organizational best practices and standards, and participate in company communities of practice to continuously refine and communicate them.
Contribute to a culture of continuous improvement.
Achieve operational excellence by automating processes and creating maintainable, supportable, and testable solutions
Keep up with technology trends and innovations in your field(s) of practice
Provide operational support and troubleshooting for your team’s products and services
Provide coaching, mentoring, and training for new or less experienced team members

Requirements

What you’ll need

Bachelor’s degree in a relevant technology field or equivalent combination of education and work experience
8+ years of engineering or other IT work experience relevant to the position
Strong expertise in z/OS internals, WLM, RMF, SMF, JES2/JES3
Hands-on experience with capacity planning and performance analysis
Proficiency in system-level diagnostics and problem determination
Experience with SMP/E, PARMLIB configuration, and system upgrades
Strong problem-solving and communication skills
Willingness to work in a highly-collaborative environment
Solid understanding and significant experience with modern software development practices, tools, and/or hardware technologies
Solid understanding of IT security best practices
Expertise in one or more technical and/or functional domains relevant to the position
Experience designing, implementing, and supporting complex technical solutions

Benefits

Comp & perks

health insurance
401(k) matching
paid time off
comprehensive benefits programs to support physical, financial, emotional, and social well-being

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

z/OSWLMRMFSMFJES2JES3capacity planningperformance analysissystem diagnosticsautomation

Soft Skills

problem-solvingcommunicationcollaborationcoachingmentoringtrainingcontinuous improvementoperational excellence