Senior Network Engineer Kubernetes & CNI

Fifthgen Tech Solution; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

Fifthgen Tech Solution is seeking a Senior Network Engineer with 7–12 years of hands-on experience in enterprise and data center networking, cloud networking, and Kubernetes networking. The role is remote with IST evening shift, supporting global deployments.

You will design, implement, and troubleshoot complex networks including BGP/Anycast, CNIs (Cilium/Calico), firewalls, and Azure networking, and you will collaborate with Ops and security teams to harden and optimize infrastructure.

Qualifications

• 7–12 years of hands-on experience in network engineering and administration.
• Strong expertise in routing and switching across enterprise and data center environments.
• Hands-on experience with Cisco Nexus and Catalyst, Aruba, and Ruckus networking technologies.
• Hands-on experience with firewalls, preferably Barracuda, along with Cisco ASA/FTD and advanced perimeter security.
• Strong knowledge of BGP and Anycast deployments.
• Hands-on experience with Kubernetes networking and CNI technologies.
• Strong practical experience with at least one CNI such as Cilium or Calico.
• Good understanding of Kubernetes networking architecture, Pod networking, Services, Network Policies, DNS, ingress/egress, and cluster connectivity.
• Experience troubleshooting Kubernetes and CNI-related network issues.
• Understanding of Meraki Wi‑Fi access points and Z/MX devices for VPN.
• Familiarity with Azure cloud networking, including VNets, VPN gateways, Azure Firewall, and hybrid connectivity.
• Exposure to AWS/GCP cloud networking is a plus.

Responsibilities

• Design, implement, and maintain network devices including switches, routers, firewalls, and CNIs.
• Manage and support firewalls, IDS/IPS, and perimeter security solutions, with Barracuda preferred.
• Configure and troubleshoot Cisco Nexus, Cisco Catalyst, Aruba, and Ruckus networking environments.
• Design and manage BGP routing, Anycast deployments, and dynamic routing strategies.
• Manage site-to-site VPNs, ISP relationships, and WAN connectivity to ensure resilient network performance.
• Monitor, diagnose, and resolve complex network connectivity and performance issues.
• Provide hands-on expertise in Azure cloud networking, including VNets, VPN gateways, firewalls, and hybrid connectivity.
• Implement, configure, and troubleshoot Kubernetes networking using CNIs such as Cilium and Calico.
• Troubleshoot Kubernetes networking issues including pod-to-pod communication, service connectivity, ingress/egress traffic, DNS, Network Policies, and cluster networking.
• Support integration of Kubernetes environments with enterprise networking, security, and storage infrastructure.
• Troubleshoot network and application-level issues involving DNS, HTTPS, TCP/IP, routing, and connectivity.
• Create and maintain detailed network documentation, architecture, and topology diagrams.
• Provide on-call support for critical network issues, outages, and escalations.
• Work with operations teams and OEM vendors to troubleshoot and resolve complex network challenges.
• Design and lead initiatives for network optimization, restructuring, resiliency, and security hardening.
• Maintain up-to-date knowledge of network administration, technologies, firmware, Kubernetes networking, and CNI solutions.
• Monitor data center environmental conditions to ensure optimal operating conditions for network and infrastructure equipment.
• Collaborate with cross-functional teams on infrastructure provisioning, rack/stack activities, Kubernetes infrastructure, and operational requirements.

Skills

Network engineering

Routing & switching

Kubernetes networking

CNI (Cilium/Calico)

Azure networking

BGP & Anycast

Firewalls & security

VPN & WAN

CNIs management

Network monitoring

Tools

Barracuda firewall

Cisco ASA/FTD

SolarWinds

Grafana

Meraki VPN

Azure VPN Gateway

Nexus/Catalyst switches

Aruba/Ruckus switches

Job description

Senior Network Engineer Kubernetes & CNI

Experience: 7–12 Years

Work Mode: Remote

Shift Timings: 5:30 PM – 2:30 AM IST

Job Description

We are looking for an experienced Senior Network Engineer with 7–12 years of hands‑on experience in enterprise and data center networking, network security, cloud networking, and Kubernetes networking. The ideal candidate should have strong expertise in routing, switching, firewalls, BGP, Anycast, Azure networking, and Container Network Interface (CNI) technologies such as Cilium and Calico.

Responsibilities

Install, configure, upgrade, and maintain network devices including switches, routers, firewalls, and Container Network Interfaces (CNIs).

Manage and support firewalls, IDS/IPS, and perimeter security solutions, with Barracuda preferred.

Configure and troubleshoot Cisco Nexus, Cisco Catalyst, Aruba, and Ruckus networking environments.

Design and manage BGP routing, Anycast deployments, and dynamic routing strategies.

Manage site-to-site VPNs, ISP relationships, and WAN connectivity to ensure resilient network performance.

Monitor, diagnose, and resolve complex network connectivity and performance issues.

Provide hands‑on expertise in Azure cloud networking, including VNets, VPN gateways, firewalls, and hybrid connectivity.

Implement, configure, and troubleshoot Kubernetes networking using CNIs such as Cilium and Calico.

Troubleshoot Kubernetes networking issues including pod‑to‑pod communication, service connectivity, ingress/egress traffic, DNS, Network Policies, and cluster networking.

Support integration of Kubernetes environments with enterprise networking, security, and storage infrastructure.

Troubleshoot network and application‑level issues involving DNS, HTTPS, TCP/IP, routing, and connectivity.

Create and maintain detailed network documentation, architecture, and topology diagrams.

Provide on‑call support for critical network issues, outages, and escalations.

Work with operations teams and OEM vendors to troubleshoot and resolve complex network challenges.

Design and lead initiatives for network optimization, restructuring, resiliency, and security hardening.

Maintain up‑to‑date knowledge of network administration, technologies, firmware, Kubernetes networking, and CNI solutions.

Monitor data center environmental conditions to ensure optimal operating conditions for network and infrastructure equipment.

Collaborate with cross‑functional teams on infrastructure provisioning, rack/stack activities, Kubernetes infrastructure, and operational requirements.

Requirements

7–12 years of hands‑on experience in network engineering and administration.

Strong expertise in routing and switching across enterprise and data center environments.

Hands‑on experience with Cisco Nexus and Catalyst, Aruba, and Ruckus networking technologies.

Hands‑on experience with firewalls, preferably Barracuda, along with Cisco ASA/FTD and advanced perimeter security.

Strong knowledge of BGP and Anycast deployments.

Hands‑on experience with vendor‑independent switching environments.

Hands‑on experience with Kubernetes networking and CNI technologies.

Strong practical experience with at least one CNI such as Cilium or Calico.

Good understanding of Kubernetes networking architecture, Pod networking, Services, Network Policies, DNS, ingress/egress, and cluster connectivity.

Experience troubleshooting Kubernetes and CNI‑related network issues.

Understanding of Meraki Wi‑Fi access points and Z/MX devices for VPN.

Familiarity with Azure cloud networking, including VNets, VPN gateways, Azure Firewall, and hybrid connectivity.

Exposure to AWS/GCP cloud networking is a plus.

Strong troubleshooting and root cause analysis skills in complex network environments.

Proficiency with network monitoring tools such as SolarWinds, Grafana, or equivalent.