Senior Network Infrastructure Engineer – F5 / NetScaler
About The Position
The Senior Network Infrastructure Engineer serves as a senior technical engineer supporting enterprise load balancing and DNS. The role leads the design, deployment, optimization, and troubleshooting of highly available infrastructure solutions, with a strong focus on F5 and Citrix NetScaler technologies. The engineer supports Fiserv’s government programs and partners with infrastructure, application, security, and vendor teams to deliver secure, resilient, and scalable solutions. The position requires in-person collaboration and follows a second-shift schedule. It requires U.S. citizenship or U.S. Permanent Resident (Green Card) status, as well as use of a computer and audio equipment.
Requirements
- At least 8 years of experience in network, systems, infrastructure engineering, or a related field.
- At least 6 years of experience with Citrix NetScaler and/or F5 design, deployment, and support.
- At least 6 years of experience with technologies such as LTM, GTM, HA, GSLB, and ad content switching.
- At least 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.
- Must possess U.S. citizenship or U.S. Permanent Resident (Green Card) status.
- Availability to work a second-shift schedule.
- Ability to participate in in-person collaboration.
Nice To Haves
- 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.
Responsibilities
- Design, deploy, and maintain 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.
Benefits
- Annual incentive opportunity for incentive-eligible associates, potentially delivered as a mix of cash bonus and equity awards at the Company’s discretion.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
