The Role
Operate and engineer network infrastructure in a 24/7 SaaS environment. Design scalable CI/CD, Network-as-Code, GitOps, Infrastructure-as-Code, SDN, Kubernetes networking, telemetry, and automated validation systems. Automate firewalls, load balancers, routing, and security policies while troubleshooting complex physical and overlay networks. Provide Tier 4 technical leadership, mentor engineers, lead design reviews, and partner with SRE, platform, and enterprise architecture teams.
Summary Generated by Built In
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.
Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves.
Role Overview
To complement our rapid growth, we are actively sourcing for a Network Engineer to operate in a 24/7 Software-as-a-Service (SaaS) environment maintaining IP Networking components in a production setting.
In this role you will:
To complement our rapid growth, we are actively sourcing for a Network Engineer to operate in a 24/7 Software-as-a-Service (SaaS) environment maintaining IP Networking components in a production setting.
In this role you will:
- Design, engineer, and oversee highly scalable CI/CD pipelines for automated testing, digital-twin dry-running, and zero-downtime deployment of configurations across massive physical and virtual network fabrics.
- Champion the "Network-as-Code" paradigm, establishing enterprise-wide GitOps workflows and enforcing source control (Git) as the absolute single source of truth for all network state, policy, and infrastructure design.
- Drive the strategic vision for network automation, designing complex, reusable code frameworks and Playbooks to permanently eliminate manual configuration and operational "toil" at a global scale.
- Design and optimize massive-scale software-defined networks (SDN) and container networking interfaces (CNIs) supporting ultra-high-throughput, multi-region cloud and bare-metal environments.
- Serve as the ultimate technical authority (SME / Tier 4) for complex network, routing, and overlay issues, rapidly deciphering and resolving the most difficult challenges across physical underlays and software-defined layers.
- Design and implement next-generation telemetry, monitoring, and alerting-as-code platforms, leveraging advanced heuristics for proactive auto-remediation of performance, security, and capacity issues.
Key Responsibilities
- Partner at a strategic level with Enterprise Designers, SRE leaders, and Platform teams to build and implement highly resilient, secure, and multi-tenant-isolated network infrastructure.
- Establish coding standards and write/review sophisticated Infrastructure-as-Code (IaC) using Ansible, Terraform, Helm, Python, and Bash.
- Lead the engineering, deployment, and optimization of modern overlay and container networking solutions, particularly VXLAN, OVN (Open Virtual Network), and Project Calico.
- Design the automation of complex security and traffic management policies across enterprise-grade firewalls (Palo Alto/Fortinet) and load balancers (F5 BIG-IP/Cloudflare/Octavia).
- Embed "Security-as-Code" directly into CI/CD pipelines, engineering automated validation gates for security groups, ACLs, and firewall rules prior to production pushes.
- Engineer robust, automated network validation suites to continuously verify network health, state, and complex routing tables (BGP, OSPF) pre- and post-deployment.
- Drive the adoption of code-based infrastructure definitions and dynamic, living technical documentation (e.g., NetBox, Git Markdown), setting the standard for documentation across the engineering organization.
Qualifications & Skills
- 8+ years of progressive experience in Network Engineering, DevOps, or SRE roles, with a deeply established focus on large-scale network design, automation, and Infrastructure-as-Code (IaC).
- Expert-level proficiency in engineering complex network automation tooling utilizing Ansible, Terraform, and Python (including deep experience with network-specific libraries like Netmiko, Nornir, or NAPALM).
- Deep design and operational expertise with massive-scale software-defined networks (SDN) and overlays, specifically VXLAN, OVN, and Project Calico.
- Advanced mastery of Kubernetes networking designs (CNIs, Ingress controllers, Service Mesh, Kube-Proxy behaviors) at an enterprise scale.
- Extensive, expert-level experience engineering and automating enterprise edge, routing, and security fabrics, including Cisco Nexus (9k/7k/5k/2k), Arista, Versa SD-WAN, and firewalls (Palo Alto and Fortinet).
- Authoritative knowledge of API-driven application delivery and load balancing across monolithic and cloud-native stacks (e.g., F5 BIG-IP AS3, Cloudflare APIs, Octavia LBaaS).
- Deep Linux internals and networking expertise, including advanced knowledge of Linux network namespaces, virtual interfaces, eBPF/iptables, and kernel-level routing.
- CCIE-level (or equivalent) mastery of core routing protocols (BGP, OSPF, MPLS, EVPN) and a comprehensive understanding of how virtual/container overlay networks map to physical underlays.
- Extensive experience designing and scaling CI/CD platforms (e.g., GitLab CI, Jenkins, GitHub Actions) and implementing test-driven development (TDD) for infrastructure changes.
- Unparalleled troubleshooting capabilities utilizing advanced packet analysis (tcpdump/Wireshark), NetFlow, and log aggregation platforms to trace asymmetric routing and microburst traffic across hybrid fabrics.
- Proven track record of technical leadership, including mentoring mid-level engineers, leading design review boards, and driving cross-functional engineering initiatives.
- Deep telecommunications background, specifically VoIP, RTP, SIP peering/trunking, and Session Border Controllers (SBC), is highly advantageous.
- Exceptional verbal and written communication skills, with the ability to translate complex technical concepts to executive stakeholders while fostering a collaborative, DevOps-oriented engineering culture.
Diversity & Inclusion
Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer.
Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer.
Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer.
View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal.
Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.
Skills Required
- 8+ years of progressive experience in Network Engineering, DevOps, or SRE roles
- Expert proficiency with Ansible, Terraform, Python, and network automation libraries such as Netmiko, Nornir, or NAPALM
- Deep experience with software-defined networks and overlays, including VXLAN, OVN, and Project Calico
- Advanced enterprise Kubernetes networking experience, including CNIs, ingress controllers, service mesh, and Kube-Proxy
- Expertise with Cisco Nexus, Arista, Versa SD-WAN, Palo Alto, and Fortinet
- Experience with F5 BIG-IP AS3, Cloudflare APIs, and Octavia LBaaS
- Deep Linux networking expertise, including namespaces, virtual interfaces, eBPF, iptables, and kernel-level routing
- CCIE-level or equivalent mastery of BGP, OSPF, MPLS, and EVPN
- Experience designing and scaling CI/CD platforms and implementing infrastructure test-driven development
- Advanced packet analysis and troubleshooting using tcpdump, Wireshark, NetFlow, and log aggregation platforms
- Technical leadership experience, including mentoring engineers, leading design reviews, and driving cross-functional initiatives
- Telecommunications experience with VoIP, RTP, SIP peering or trunking, and Session Border Controllers
- Exceptional verbal and written communication skills
Five9 Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Five9 and has not been reviewed or approved by Five9.
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Healthcare Strength — Employer-paid employee premiums, multiple plan options, and broad coverage across medical, dental, vision, disability, FSAs, and EAP are emphasized as core elements of the package. These features position healthcare as a standout component of total rewards.
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Equity Value & Accessibility — Equity grants and an ESPP are highlighted as meaningful parts of total compensation. Feedback suggests these stock components can materially enhance overall pay when company performance is favorable.
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Fair & Transparent Compensation — Public job postings include salary ranges and company materials describe formal peer benchmarking of pay. These practices indicate structure and visibility around compensation decisions.
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The Company
What We Do
Five9 is an industry-leading provider of cloud contact center solutions, bringing the power of cloud innovation to more than 2,000 customers worldwide and facilitating billions of customer engagements annually. The Five9 Intelligent Cloud Contact Center provides digital engagement, analytics, workflow automation, workforce optimization, and practical AI to help customers reimagine their customer experience. Designed to be reliable, secure, compliant, and scalable, the Five9 platform helps increase agent and supervisor productivity, connects the contact center to the business, and ultimately deliver tangible business results including increased revenue and enhanced customer trust and loyalty
