Core Network Engineer (Arista)

iSystems Ltd · Lahore, Pakistan

Systems Limited is looking for an experienced Core Network Engineer (Arista) with expertise in data centre networking, migration, and hybrid cloud connectivity. The ideal candidate will be responsible for designing, implementing, and managing enterprise network infrastructure, ensuring seamless data centre migrations, network reliability, and optimal performance.

Responsibilities

• Design, implement, and manage Arista core network infrastructure, including leaf-spine architecture, MLAG, VXLAN/EVPN, and Layer 2/3 networking.
• Lead end-to-end data centre migration activities, including discovery, dependency mapping, cutover planning, and execution.
• Architect and manage hybrid cloud connectivity using Azure ExpressRoute, OCI FastConnect, and GCP Interconnect.
• Configure and optimize network protocols and technologies, including BGP, OSPF, VLANs, VRFs, QoS, load balancing, firewalls, and VPNs.
• Perform capacity planning, network monitoring, firmware upgrades, and security hardening.
• Troubleshoot complex network issues to ensure high availability and performance.
• Maintain technical documentation, including HLDs, LLDs, runbooks, and change management records.

Requirements

• 8+ years of experience in core network engineering, data centre networking, or related infrastructure roles.
• Strong hands-on experience withArista EOS, CloudVision, and network fabric design and operations.
• Proven experience leading data centre migrations, including cutover planning and execution.
• In-depth knowledge of BGP, OSPF, VXLAN/EVPN, MLAG, and hybrid cloud connectivity.
• Strong network troubleshooting and packet-level analysis skills.
• Experience with network monitoring tools such as SolarWinds or Zabbix.
• Certifications such as Arista ACE-A/P, Cisco CCNP/CCIE, or Microsoft AZ-700 will be an advantage.
• Knowledge of network automation using Ansible or Python is a plus.