Network Engineer II – Operations

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide.

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Network Engineer II – Operations

About Five9

Five9 is a leading provider of cloud software for the enterprise contact center market, bringing the power of the cloud to thousands of customers and facilitating more than three billion customer interactions annually. Since 2001, Five9 has led the cloud revolution in contact centers, helping organizations transition from legacy premise-based solutions to the cloud. Five9 provides businesses with cloud contact center software that is reliable, secure, compliant, and scalable — designed to create exceptional customer experiences, increase agent productivity, and deliver tangible business results.

The Role

To complement our rapid growth, we are sourcing a Network Engineer II to operate in a 24/7 Software-as-a-Service (SaaS) environment, taking ownership of complex LAN infrastructure initiatives and driving operational excellence across Cisco Nexus, Palo Alto, and F5 platforms. You will lead projects, own end-to-end troubleshooting, drive automation strategy, and provide technical leadership during incidents — while mentoring junior engineers and representing the network domain to senior stakeholders.

Troubleshooting & Incident Response

Own end-to-end troubleshooting of complex LAN connectivity, firewall policy, and load balancer issues, and drive resolution with customers and internal teams.

Conduct in-depth analysis of network incidents, identify root causes, and implement preventive measures to reduce repeat occurrences.

Lead and coordinate responses to network and security incidents, ensuring timely resolution and minimizing potential impacts.

Participate in on-call rotation following the Sun Model schedule; provide technical leadership during outages and lead post-incident root cause analysis and corrective action planning.

Lead the review, analysis, and execution of network change requests within the data-center fabric domain, ensuring adherence to change management and risk-mitigation standards.

Projects & Architecture

Lead and drive LAN infrastructure projects involving Cisco Nexus switching, Palo Alto firewalls, F5 load balancers, and NDFC fabric management .

Partner with cross-functional stakeholders to design and deliver next-generation data-center fabric architectures, leveraging VXLAN, Cisco Nexus Dashboard, Kubernetes networking (Calico), and AI/ML-enabled networking .

Manage and operate data-center fabric services across hybrid and multi-cloud environments — on-premises Cisco Nexus infrastructure, GCP, and AWS .

Perform traffic engineering and capacity planning to guide long-term infrastructure investments.

Develop and maintain technical roadmaps, architecture standards, and configuration policies for LAN, firewall, and load balancer environments.

Manage and maintain existing network infrastructure (Nexus, Palo Alto, F5), ensuring reliability, performance, and equipment lifecycle planning.

Monitoring & Observability

Develop and report operational and performance metrics using observability platforms including Prometheus, Grafana, and SolarWinds .

Define, measure, and report site reliability using SLI/SLO

Maintain operational focus on the data-center fabric while coordinating cross-team efforts with network security and load balancing functions to ensure end-to-end service reliability.

Analyze historical network incidents to identify systemic issues and inform preventive engineering.

Automation

Drive automation strategy and execution using Ansible, Terraform, Python, and CI/CD pipelines for provisioning, configuration, and monitoring.

Implement automated remediation to prevent recurrence of known issues.

Demonstrate and scale a culture of automation across engineering and operations teams.

Track and manage projects, processes, and technology initiatives across the team, ensuring alignment, visibility, and timely execution.

Maintain runbooks, topology diagrams, and SOPs.

Security

Manage overall network security including routing policies, Palo Alto firewall rules, and access controls to protect infrastructure.

Own all operational aspects of network security infrastructure — OS maintenance, vulnerability management, capacity planning, lifecycle management, and certificate administration.

Requirements

Bachelor's degree in computer science or a related technical field preferred, or equivalent practical experience.

Minimum 5 years of experience in medium-to-large networks, IP routing, switching, and security principles in a production SaaS or enterprise environment, including experience as a technical subject matter expert.

Deep hands-on expertise with Palo Alto firewalls — security policy design, Panorama management, Global Protect VPN, and threat prevention.

Advanced experience with F5 BIG-IP — LTM, GTM, iRules, SSL offloading, and application delivery configurations.

Expert-level knowledge of Cisco Nexus 9k/7k/5k/2k, NX-OS, and NDFC , including VXLAN/EVPN fabric deployments.

Extensive hands-on experience with software-defined networking (SDN) — OpenStack Neutron and Calico (Kubernetes) .

Hands-on skills with Cisco IOS required; Nexus OS and NDFC expertise required.

Proven experience automating infrastructure processes and deployments using Ansible, Terraform, Python, and CI/CD pipelines , with demonstrated ability to drive and scale a culture of automation.

Demonstrated expertise in LAN protocols and technologies — VXLAN, EVPN, OSPF, BGP, MPLS, and STP/RSTP — with strong hands-on experience with dynamic routing protocols, particularly BGP in data-center fabric environments.

Experience implementing solutions involving large data centers, inter-business routing plans, site-to-site IPSec VPNs, firewalls, and MPLS VPNs.

Strong experience with network monitoring and observability tools — SolarWinds, Prometheus, Grafana, NetFlow, SNMP, and packet brokers.

Demonstrated experience with incident response, root cause analysis, change management, and operational governance; experience defining, measuring, and reporting reliability using SLI/SLO metrics.

Knowledge of Linux network functions and SaaS/cloud-based environments.

Knowledge of AWS and GCP cloud platforms, including cloud networking concepts such as VPCs, security groups, transit gateways, and cloud-based load balancing.

Proven ability to mentor engineers, lead technical projects independently, and manage multiple initiatives in parallel, with demonstrated project management skills.

Excellent communication skills, both oral and written; ability to clearly represent technical domains and team outcomes to senior leadership and non-technical stakeholders.

Nice to Have

Telecommunications technologies — VoIP, RTP, SIP peering/trunking, and SBC.

Work Location: This role is fully remote for candidates who reside outside a driving distance of 20-kilometers of our office. Candidates who reside within 20-kilometers driving distance of our office would be required to work in-office 2 days a week.

Work Location: This role is hybrid and requires 2 days a week in office.

Company Benefits

Company stocks

Annual merit increase based on performance

15% night shift differential pay

Paid Leave with Cash Conversion

HMO with free dependents

Retirement Plan

Life Insurance

While on work from home setup: Internet and meal allowance are provided

Employee Assistance Program for mental and social well-being

Government-mandated Benefits (SSS, PhilHealth, PagIBIG, 13 th month pay, S