Senior Software Engineer - MPLS/VPN Protocol Development

Job Summary


Responsibilities

• Implement MPLS label switching - label operations, LFIB, and FEC-to-label binding
• Implement LDP (RFC 5036) and RSVP-TE (RFC 3209) for traffic engineering, including fast reroute
• Develop L3VPN (VRF, RD, RT, MP-BGP integration) and L2VPN (VPLS, VPWS, EVPN with VXLAN encapsulation)
• Integrate with IGP/BGP routing protocols and implement MPLS OAM (LSP ping, traceroute)
• Write and test C/C++ code, debug protocol issues with Wireshark/GDB/tcpdump, and profile label-switching throughput
• Mentor 2-3 junior engineers and collaborate with the Principal Engineer on design decisions

Requirements

• 3+ years of software development experience, with 2+ years in network protocol development (MPLS, VPN, or routing protocols)
• Strong understanding of TCP/IP networking fundamentals and MPLS concepts
• Hands-on experience implementing or debugging network protocols in production environments
• Experience with the Linux networking stack and systems programming

Nice to Have

• Understanding of Segment Routing over MPLS (SR-MPLS) and SRv6
• Familiarity with EVPN-VXLAN architecture for data center fabrics
• Understanding of traffic engineering and constraint-based routing
• Experience with CI/CD pipelines and automated testing

Key Skills

• C/C++
• MPLS (RFC 3031/3032)
• LDP
• RSVP-TE
• L3vpn/l2vpn/evpn
• VXLAN
• Wireshark
• GDB
• Git

What You ll Gain

• Work on cutting-edge network operating system used in carrier-grade deployments
• Learn from experienced Principal Engineers and System Architects
• Deep technical expertise in MPLS, VPN, and network systems programming
• Career growth path to Lead Engineer and Principal Engineer roles

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