System Architect / Principal Engineer - IP Routing and MPLS-TE

Job Summary


Responsibilities

• Architect routing, MPLS, VPN, and Segment Routing subsystems for IPv4/IPv6, compliant with IETF/ISO standards
• Design and implement IGP protocols (OSPF v2/v3, IS-IS) and BGP-4/MP-BGP across multiple address families
• Design and implement MPLS label switching, LDP, and RSVP-TE for traffic engineering, plus L3VPN, L2VPN, and EVPN
• Design and implement Segment Routing (SR-MPLS, SRv6) with IGP extensions, SR Policy, and TI-LFA
• Design for large-scale deployments - millions of routes, thousands of BGP peers - with sub-second convergence and carrier-grade reliability (GR, NSR, ISSU, BFD)
• Mentor engineers, run code and architecture reviews, and drive cross-functional collaboration across routing, MPLS, and data plane teams

Requirements

• 10+ years in software engineering, with 5+ years focused on routing and MPLS protocol development
• Expert knowledge of IGP protocols (OSPF, IS-IS) and BGP-4/MP-BGP with hands-on implementation experience
• Deep understanding of Segment Routing (SR-MPLS, SRv6, SR Policy), L3VPN, L2VPN, and EVPN architectures
• Proven track record shipping production-grade routing and MPLS implementations at carrier-grade scale

Nice to Have

• Open-source routing protocol contributions to community projects
• Segment Routing deployment experience with SR-MPLS or SRv6
• Data center EVPN deployment experience with VXLAN overlays

Key Skills

• C/C++
• OSPF
• IS-IS
• Bgp-4/mp-bgp
• Mpls/ldp/rsvp-te
• Sr-mpls/srv6
• L3vpn/l2vpn/evpn
• Linux Networking
• Wireshark

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