Principal, Mainframe Performance and Capacity

Fidelity Investments • Westlake, TX

6d

About The Position

As a Principal Engineer in Fidelity's Mainframe Capacity and Performance Engineering organization, you will analyze, monitor, and improve the performance of critical middleware platforms supporting core business applications. The role involves identifying performance bottlenecks, conducting capacity analysis, creating automated reporting and dashboards, and supporting incident investigations across IBM mainframe technologies. You will partner with application, infrastructure, and engineering teams to improve system reliability, scalability, and operational readiness. Through actionable insights and automation, you will help maintain a high-performing and resilient technology environment supporting millions of customer interactions.

The Mainframe Capacity and Performance Engineering team provides capacity planning, performance analysis, monitoring, system tuning, and advanced problem determination for business-critical online and batch applications across the enterprise. The team works closely with application development, infrastructure engineering, database, storage, network, security, and operations organizations, as well as strategic technology vendors, to support the performance and resiliency of Fidelity's mainframe platforms.

Requirements

• At least 7 years of experience supporting performance engineering, capacity management, systems programming, production engineering, or application infrastructure in large-scale enterprise environments.
• Hands-on experience with one or more IBM mainframe middleware platforms, including CICS, IBM MQ, WebSphere Application Server (WAS), Liberty, Compute Grid, Kafka integrations, or Operational Decision Manager (ODM).
• Strong understanding of z/OS performance data, including SMF/RMF metrics, memory management, Coupling Facility services, log streams, and subsystem interactions.
• Experience with performance and observability tools such as IntelliMagic, SYSVIEW, SAS/MXG, Grafana, Datadog, Prometheus, PostgreSQL, VictoriaMetrics, or similar platforms.
• Ability to analyze technical data, isolate root causes, validate assumptions, and communicate recommendations to technical and business partners.
• Experience developing scripts, automation, dashboards, or reporting solutions using SAS, REXX, Python, Java, Bash, or similar languages.
• Strong written and verbal communication skills, including the ability to document findings, operational procedures, and technical recommendations.
• Experience supporting production incidents, change validation, performance testing, and operational readiness activities.
• Bachelor's degree in Computer Science, Engineering, Information Technology, Mathematics, or a related discipline preferred; equivalent experience will be considered.
• Fidelity will not provide immigration sponsorship for this position.

Nice To Haves

• Bachelor's degree in Computer Science, Engineering, Information Technology, Mathematics, or a related discipline is preferred; equivalent experience will be considered.

Responsibilities

• Analyze, monitor, and improve the performance of critical middleware platforms supporting core business applications.
• Identify performance bottlenecks and conduct capacity analysis.
• Create automated reporting and dashboards.
• Support incident investigations across IBM mainframe technologies.
• Partner with application, infrastructure, and engineering teams to improve reliability, scalability, and operational readiness.
• Provide capacity planning, performance analysis, monitoring, system tuning, and advanced problem determination for business-critical online and batch applications.
• Support production incidents, change validation, performance testing, and operational readiness activities.
• Communicate and document findings, operational procedures, and technical recommendations.

What This Job Offers

• Job Type: Full-time
• Career Level: Principal
• Education Level: No Education Listed