Mainframes Developer Jobs in Jacksonville, FL (NOW HIRING)

Job Description

We are FIS. Our technology powers the world's economy, and our teams bring innovation to life. We champion diversity to deliver the best products and solutions for our colleagues, clients and communities. If you're ready to start learning, growing and making an impact with a career in fintech, we'd like to know: Are you FIS?

About the Role:

You will lead capacity planning and performance management activities for enterprise z/OS mainframe environments supporting critical financial services workloads. The role focuses on forecasting resource demand, optimizing system performance, and ensuring infrastructure readiness to meet business growth and service-level objectives. You will collaborate with infrastructure, engineering, operations, and business stakeholders to translate workload trends into actionable capacity strategies. Success is measured through system reliability, efficient resource utilization, accurate forecasting, and proactive risk management.

What You Will Be Doing:

Analyze CPU, memory, storage, network, and workload utilization across z/OS environments

Develop short-term and long-term capacity forecasts using historical and predictive analysis techniques

Monitor performance trends and identify risks impacting availability, throughput, and scalability

Create capacity models supporting business growth, application changes, and infrastructure modernization

Partner with engineering and operations teams to optimize system performance and resource utilization

Evaluate workload characteristics and recommend tuning opportunities for improved efficiency

Prepare executive and operational reporting on capacity consumption, trends, and future requirements

Support budget planning through infrastructure demand forecasting and capacity recommendations

Assess the capacity impact of new applications, platform upgrades, and technology initiatives

Maintain capacity planning standards, documentation, metrics, and governance processes

Required Qualifications:

Bachelor's degree or equivalent practical experience in information technology, computer science, or a related field

Experience supporting and analyzing IBM z/OS mainframe environments

Strong expertise in capacity planning, performance analysis, and infrastructure forecasting

Proficiency interpreting system performance metrics and workload utilization data

Knowledge of mainframe architecture, processor technologies, storage, and subsystem performance

Experience with capacity management, trend analysis, statistical modeling, and reporting tools

Ability to communicate technical findings and recommendations to business and technology stakeholders

Strong analytical, problem-solving, and data-driven decision-making skills

Preferred Qualifications:

Experience with SMF, CMF, MXG, SAS, MICS, or similar performance and capacity management tools

Knowledge of workload management concepts and mainframe performance tuning practices

Experience supporting financial services, banking, payments, or highly regulated environments

Familiarity with automation, scripting, or data analytics platforms used for infrastructure reporting

Understanding of hybrid infrastructure environments and enterprise technology planning

What We Offer you:

At FIS, you can grow your career as far as you want to take it. Here's what else we offer:

Opportunities to make an impact in fintech

Personal and professional learning

Inclusive, diverse work environment

Resources to give back to your community

Competitive salary and benefits

FIS is committed to providing its employees with an exciting career opportunity and competitive compensation. The pay range for this full-time position is $111,650.00 - $189,810.00 and reflects the minimum and maximum target for new hire salaries for this position based on the posted role, level, and location. Within the range, actual individual starting pay is determined by additional factors, including job-related skills, experience, and relevant education or training. Any changes in work location will also impact actual individual starting pay. Please consult with your recruiter about the specific salary range for your preferred location during the hiring process.

Privacy Statement

FIS is committed to protecting the privacy and security of all personal information that we process in order to provide services to our clients. For specific information on how FIS protects personal information online, please see the Online Privacy Notice.

EEOC Statement

FIS is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, marital status, genetic information, national origin, disability, veteran status, and other protected characteristics. The EEO is the Law poster is available here supplement document available here

For positions located in the US, the following conditions apply. If you are made a conditional offer of employment, you will be required to undergo a drug test. ADA Disclaimer: In developing this job description care was taken to include all competencies needed to successfully perform in this position. However, for Americans with Disabilities Act (ADA) purposes, the essential functions of the job may or may not have been described for purposes of ADA reasonable accommodation. All reasonable accommodation requests will be reviewed and evaluated on a case-by-case basis.

Sourcing Model

Recruitment at FIS works primarily on a direct sourcing model; a relatively small portion of our hiring is through recruitment agencies. FIS does not accept resumes from recruitment agencies which are not on the preferred supplier list and is not responsible for any related fees for resumes submitted to job postings, our employees, or any other part of our company.

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