
Senior Application Analyst - Mainframe
Greenwood Village, COJob$90–158K/yrSeen 2w agoSeen in employer's feed today
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At a glance
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Job overview
The Senior Application Analyst joins a technology team supporting enterprise mainframe applications for Fiserv’s financial services platforms. The role focuses on application reliability, performance, and compliance in an SLA-driven production environment, using COBOL, JCL, DB2, CICS, and IBM z/OS. The analyst also supports testing, production issue resolution, performance tuning, and collaboration with cross-functional team members.
Skills & qualifications
Skills
Qualifications
Full job description
Calling all innovators – find your future at Fiserv.
We’re Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants, and consumers to one another millions of times a day – quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we’re involved. If you want to make an impact on a global scale, come make a difference at Fiserv.
Job Title
Senior Application Analyst - Mainframe
About your role:
You will join a technology team responsible for supporting enterprise mainframe applications that power Fiserv’s core financial services platforms. In this role, you will apply deep technical expertise and strong problem-solving skills to ensure system reliability, performance, and compliance in a fast-paced, SLA-driven production environment.
What you’ll do:
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Modify, test, and support mainframe applications using COBOL, JCL (DB2), and CICS in an IBM z/OS environment.
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Review application designs and source code to assist with testing, debugging, and production readiness.
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Code and test high-priority and critical changes in support of business and operational requirements.
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Perform performance tuning and optimization of mainframe applications to maintain stability and efficiency.
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Troubleshoot and resolve production issues, including root cause analysis and defect correction.
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Collaborate with remote and cross-functional team members to deliver reliable application support.
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Provide regular project and task status updates to project managers and related stakeholders.
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Create and maintain technical and operational documentation to support ongoing application maintenance.
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Responsibilities listed are not intended to be all-inclusive and may be modified as necessary.
Experience you’ll need to have:
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6+ years of software development experience.
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Hands-on experience in an IBM Mainframe (z/OS) environment.
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Proficiency with COBOL, JCL, and DB2.
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Experience deploying fixes in SLA-driven production environments.
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Strong analytical and communication skills.
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Experience in creating technical documentation.
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Bachelor’s degree in computer science, Information Technology, or equivalent practical experience.
Experience that would be great to have:
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DB2 utilities, IDCAMS, SyncSort, File-Master, CICS.
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FTP / NDM file transmission.
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REXX, Endevor, Clarity, Jira.
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Microsoft Outlook, Word, Excel, SharePoint.
How you’ll work:
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On-call rotational support.
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Use of Computer and audio equipment required.
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Per contractual obligations, must be a US citizen or US Permanent Resident with the ability to obtain and maintain an extended background check
Salary Range
$90,000.00 - $158,400.00
These pay ranges apply to employees in Colorado, Hawaii, Illinois, Nevada, Rhode Island, Vermont and Washington. Pay ranges for employees in other states may differ.
For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company’s sole discretion.
It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.
Thank you for considering employment with Fiserv. Please:
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Apply using your legal name
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Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).
Our commitment to Equal Opportunity:
Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.
If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process, please contact [email protected] . Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv’s Disability Accommodation Policy for additional information.
Note to agencies:
Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.
Warning about fake job posts:
Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.
How this job compares
Set against the 41,554 open Software Engineer jobs on Olive Jobs, counted November 10, 2026.
- Pay
- This posting$90–158K/yr
- Colorado median$122–193K/yr1,138 salary ranges
- US median$135–219K/yr33,110 salary ranges
This range's midpoint, $124K, is 20% below the Colorado median midpoint ($155K) — in the lowest quarter of Software Engineer salary ranges in Colorado.
- Openings
- Olive Jobs lists 1,352 open Software Engineer jobs in Colorado and 41,554 across the US. 8% of them nationwide are listed as remote or flexible.
- Hiring the most in Colorado
- Lockheed Martin91 open
- Oracle75 open
- Anduril63 open
- Experience
- This posting asks for at least 6 years of experience; Software Engineer postings that state a minimum ask for 5 years at the median (34,072 postings).
- Education
- 13,032 of the 41,554 open Software Engineer jobs (31%) ask for a bachelor's degree or higher.
Counted across the open, public US postings on Olive Jobs on November 10, 2026. Pay medians are the middle values of the low ends and of the high ends of postings that list both ends of a range in the same cadence (a yearly salary or an hourly rate); a range's midpoint is halfway between its ends. Pay and experience figures resting on fewer than 20 postings are left out.
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