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# Senior Network Infrastructure Engineer - F5 / NetScaler

- **Company:** Fiserv, Inc.
- **Location:** Frisco, TX, United States
- **Experience:** Expert
- **Salary:** $128,000 - $216,000
- **Contract:** Permanent contract
- **Skills:** Domain Name System Security Extensions, Domain Name System (DNS), Multi-Factor Authentication, Python (Programming Language), Network Architecture, Performance Tuning, Ansible, Web Applications, Load Balancing, Infrastructure Automation Frameworks, Information Technology, Citrix Netscaler
- **Published:** November 6, 2026
- **Apply:** https://dejobs.org/x/x/FCBF8F736F654738806A1D29630F055F/job/

## About the Role

* 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

## Description

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., * 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, * 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

#Hiring #NetworkEngineering #F5 #F5BIGIP #NetScaler #LoadBalancing #InfrastructureEngineering #CloudInfrastructure #TechJobs #L1-CD1

Salary Range

$128,000.00 - $216,000.00

These pay ranges apply to employees in New Jersey and New York. Pay ranges for employees in other states may differ.

It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.

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.