At F5, we strive to bring a better digital world to life. Our teams empower organizations across the globe to create, secure, and run applications that enhance how we experience our evolving digital world. We are passionate about cybersecurity, from protecting consumers from fraud to enabling companies to focus on innovation.

Everything we do centers around people. That means we obsess over how to make the lives of our customers, and their customers, better. And it means we prioritize a diverse F5 community where each individual can thrive.

Site Reliability Engineer III (SRE) – Network Focus

About the Role

We’re looking for an experienced Site Reliability Engineer III with a deep focus on networking to help design, build, and operate the critical network infrastructure that supports our global platforms. You’ll work across cloud and on‑prem environments, ensuring our systems are reliable, scalable, secure, and observable. This role blends hands‑on engineering with architectural thinking and cross‑team collaboration.

Key Responsibilities

• Design and maintain core network infrastructure across cloud, data center, and hybrid environments.

• Implement and optimize network automation to reduce manual operations and improve consistency.

• Develop and maintain network observability including metrics, logs, tracing, and alerting for network‑centric systems.

• Lead incident response for network‑related issues and drive root‑cause analysis and long‑term remediation.

• Collaborate with SRE, security, and platform teams to ensure network reliability aligns with service needs.

• Manage and evolve load balancing, routing, and traffic management for high‑availability systems.

• Define and enforce network reliability standards including SLOs, SLIs, and error budgets.

• Harden network security through segmentation, policy enforcement, and best‑practice configurations.

• Support capacity planning and performance tuning for network‑heavy workloads.

• Mentor junior engineers and contribute to a culture of operational excellence.

Required Qualifications

• 5–8 years of experience in SRE, network engineering, or infrastructure roles with production ownership.

• Deep understanding of networking fundamentals including TCP/IP, DNS, BGP, OSPF, VLANs, and firewalls.

• Hands‑on experience with cloud networking (AWS VPC, Transit Gateway, Azure VNets, GCP VPC).

• Proficiency with network automation tools such as Ansible, Terraform, or vendor‑specific APIs.

• Experience with load balancers and traffic management (NGINX, Envoy, cloud LB services).

• Strong Linux systems knowledge and comfort troubleshooting at multiple layers.

• Programming or scripting skills in Python, Go, or similar languages.

• Experience with observability platforms such as Prometheus, Grafana, ELK, or Open Telemetry.

• Proven track record in incident management for network‑related outages.

Preferred Qualifications

• Experience with SDN technologies (e.g., Cisco ACI, VMware NSX).

• Knowledge of zero‑trust networking principles and modern security architectures.

• Background with distributed systems networking (Kafka, microservices, multi‑cluster).

• Vendor certifications such as CCNP, CCIE, JNCIP, or cloud networking specialties.

• Experience contributing to network automation tooling or open‑source projects.

What Success Looks Like

• Highly reliable, observable network infrastructure supporting mission‑critical services.

• Reduced operational toil through automation and standardized tooling.

• Fast, accurate detection and resolution of network‑related incidents.

• Strong cross‑team alignment on network reliability, performance, and security.

• A scalable, future‑ready network architecture that supports organizational growth.

The Job Description is intended to be a general representation of the responsibilities and requirements of the job. However, the description may not be all-inclusive, and responsibilities and requirements are subject to change.

The annual base pay for this position is: $149,600.00 - $224,400.00

F5 maintains broad salary ranges for its roles in order to account for variations in knowledge, skills, experience, geographic locations, and market conditions, as well as to reflect F5’s differing products, industries, and lines of business. The pay range referenced is as of the time of the job posting and is subject to change.

You may also be offered incentive compensation, bonus, restricted stock units, and benefits. More details about F5’s benefits can be found at the following link: https://www.f5.com/company/careers/benefits. F5 reserves the right to change or terminate any benefit plan without notice.

Please note that F5 only contacts candidates through F5 email address (ending with @f5.com) or auto email notification from Workday (ending with f5.com or @myworkday.com).

Equal Employment Opportunity

It is the policy of F5 to provide equal employment opportunities to all employees and employment applicants without regard to unlawful considerations of race, religion, color, national origin, sex, sexual orientation, gender identity or expression, age, sensory, physical, or mental disability, marital status, veteran or military status, genetic information, or any other classification protected by applicable local, state, or federal laws. This policy applies to all aspects of employment, including, but not limited to, hiring, job assignment, compensation, promotion, benefits, training, discipline, and termination. F5 offers a variety of reasonable accommodations for candidates. Requesting an accommodation is completely voluntary. F5 will assess the need for accommodations in the application process separately from those that may be needed to perform the job. Request by contacting accommodations@f5.com.