Senior Network Infrastructure Engineer – F5 / NetScaler
Confirmed on the employer's own hiring board on Nov 15, 2026. First seen by Alion on Nov 5, 2026. Fiserv scores B on the Alion truth index.
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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 Network Infrastructure Engineer - F5 / NetScalerAbout your role
You will serve as a senior technical engineer supporting enterprise load balancing and DNS. You will lead the design, deployment, optimization, and troubleshooting of highly available infrastructure solutions, with a strong focus on F5 and Citrix NetScaler technologies. You will support Fiserv’s government programs, partnering with infrastructure, application, security, and vendor teams to deliver secure, resilient, and scalable solutions.
What you’ll do
- Design, deploy, and maintain a critical local and global load balancing infrastructure using Citrix NetScaler and F5 solutions.
- Manage DNS infrastructure and configurations
- Design and implement load balanced application configurations
- Provide technical leadership and design guidance for application teams.
- Troubleshoot complex infrastructure issues and drive problems through resolution
- Lead platform upgrades, configuration changes, capacity planning, and performance optimization
- Develop and maintain configurations for virtual servers, certificates, policies, and related services
- Understand encryption technologies commonly used by web applications, DNS, and load balancing
- Partner with application, infrastructure, security, OEM, and vendor teams on technical solutions
- Operate in a regulated, controlled financial environment.
- Develop technical standards, documentation, and implementation procedures
- Identify opportunities to improve and automate infrastructure processes using tools such as Python and Ansible
- Provide technical guidance and knowledge sharing across engineering teams
Experience you’ll need to have
- 8+ years of experience in network, systems, infrastructure engineering, or a related field
- 6+ years of experience with Citrix NetScaler and/or F5 design, deployment, and support
- 6+ years of experience with technologies such as LTM, GTM, HA, GSLB, ad content switching.
- 4+ years of DNS experience, such as Bluecat, DNSSEC, and F5 XC.
- Experience troubleshooting complex financial, regulated, enterprise infrastructure environments
- Bachelor’s degree in computer science, engineering, information technology, business, or a related field, or an equivalent combination of education, related experience, and/or military experience
Experience that would be great to have
- Experience with Python, Ansible, or other infrastructure automation tools
- Experience with multi-factor authentication solutions
- Experience supporting large-scale infrastructure migrations or modernization initiatives
- F5 certifications such as F5-CTS or F5-CSE
- Strong communication skills and experience working across technical teams, vendors, and business partners
Important information about this role
- This position requires in-person collaboration
- Must possess U.S. Citizenship or U.S. Permanent Resident (Green Card) status
- This position will work a second-shift schedule
How you’ll work
- This role requires the use of a computer and audio equipment
Salary Range
$127,500.00 - $204,000.00These 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:
- Apply using your legal name
- 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.
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Fiserv does not accept resume submissions from agencies outside of existing agreements. Pleasedo not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.
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