Senior Core Network Engineer

Description

Position Summary

• We are seeking a highly experienced
• Senior Core Network Engineer to lead the design, implementation, and optimization of our carrier-grade IP/MPLS and FTTH network infrastructure. This role is critical to ensuring scalability, resiliency, and performance across our core, aggregation, and access networks.
• The ideal candidate has deep experience operating within an
• Internet Service Provider (ISP) or telecommunications environment , with hands-on expertise in
• Adtran access platforms, Arista routing/switching , and large-scale

FTTH deployments

.

This is a senior-level technical role requiring both architectural leadership and advanced operational troubleshooting capability.

Key Responsibilities

Core Network Architecture & Engineering

Design, implement, and maintain high-availability

IP/MPLS core networks

• .
• Engineer scalable BGP-based edge and peering infrastructure.
• Architect resilient L2/L3 topologies for aggregation and backbone layers.
• Lead IPv4/IPv6 dual-stack strategy and deployment.

FTTH & Access Network Engineering

Design and support

FTTH (Fiber-to-the-Home) GPON/XGS-PON environments

.

Configure and manage

• Adtran OLTs, aggregation platforms, and access systems
• .
• Support subscriber provisioning models and service delivery frameworks.
• Collaborate with outside plant (OSP) and field engineering teams.

Routing & Switching (Arista Focus)

Deploy and support

• Arista switching and routing platforms in core and aggregation roles.
• Implement EVPN/VxLAN where applicable.
• Optimize traffic engineering, QoS, and multicast routing.

ISP Operations & Optimization

• Support upstream providers, IX peering, and transit relationships.
• Perform traffic capacity planning and bandwidth forecasting.
• Lead root cause analysis of network outages and performance incidents.
• Develop monitoring, alerting, and performance visibility standards.
• Participate in Tier 3 escalation and on-call rotation.

Automation & Documentation

• Drive automation initiatives (Python, Ansible, etc.).
• Maintain accurate network diagrams, IP schema, and routing policies.
• Develop operational runbooks and engineering standards.

Required Qualifications

• 7–10+ years of experience in a carrier, ISP, or telecommunications environment

.

• Extensive experience with:
• Adtran platforms (OLT, aggregation, access equipment)
• Arista switches and routers
• FTTH architecture and subscriber networks
• Deep expertise in:
• BGP (iBGP, eBGP, route reflectors)
• OSPF and/or IS-IS
• MPLS (L2VPN/L3VPN preferred)
• VLAN, QinQ, QoS
• Multicast (PIM)
• Experience with ISP edge routing and peering design.
• Strong troubleshooting skills in production networks serving large subscriber bases.
• Experience designing high-availability and redundant architectures.

Preferred Qualifications

• Experience with GPON and XGS-PON design.
• Familiarity with BRAS/BNG architectures.
• Experience with subscriber management and AAA (RADIUS).
• Knowledge of DDoS mitigation and ISP security best practices.
• Experience with DWDM or transport integration.
• Industry certifications:
• CCNP/CCIE (Service Provider preferred)
• Arista ACE
• MEF or equivalent carrier certifications

Key Competencies

Carrier-grade design mindset

• Strong understanding of ISP traffic patterns and subscriber behavior
• Ability to operate in fast-growing network environments
• Excellent documentation and cross-team communication skills
• Leadership capability for mentoring junior engineers

Why Join Us?

• Build and scale next-generation fiber infrastructure.
• Work in a high-growth ISP environment.
• Influence core network strategy.
• Competitive compensation and benefits.
• Medical, Dental, Vision, Long Term Disability, Short Term Disability and Voluntary Buy Up of Life Insurance

Paid time off

Parental Leave

Team Building events

Opportunity for technical leadership and career growth.