Senior Software Engineer - IPv6 Networking exp is a must**

About this role

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Skills you'll use

What you'll do

• Lead IPv6 Architecture & Feature Delivery — Own end-to-end design and implementation of IPv6 features across the Sonicwall frewall networking stack, including IPv6 routing, interface addressing, DHCPv6, NDP, MLDv2, and IPv6 Policy-Based Routing (PBR).
• Drive IPv6 Feature Parity — Identify and close gaps between IPv4 and IPv6 feature sets across subsystems — including VPN Tunnel Interfaces, IPsec/IKEv2, SSL-VPN, Syslog, SNMP, and NAT64 — ensuring consistent dual-stack and IPv6-only operation.
• Design High-Performance IPv6 Packet Processing Paths — Architect and optimize the IPv6 dataplane for packet forwarding, classification, ACL matching, and session lookup within the sonicwall high-performance packet-processing pipeline.
• Resolve Complex IPv6 Protocol Issues — Diagnose and resolve deep-rooted interoperability, conformance, and performance issues involving IPv6 neighbor discovery, prefix delegation, ICMPv6 error handling, and fragmentation edge cases.
• Establish IPv6 Protocol Conformance Standards — Define and drive compliance with IETF IPv6 RFCs (RFC 2460, RFC 4291, RFC 4861, RFC 4862, RFC 6724, RFC 8200, and related extensions) within the Sonicwall frewall codebase.
• Cross-Functional Collaboration — Work closely with Platform, Security, Data Platform, and QA teams to integrate IPv6 changes safely across subsystems and validate correctness at scale.
• Prototype and Evaluate IPv6 Technologies — Evaluate emerging IPv6 transition mechanisms (464XLAT, MAP-T, CLAT, SRv6) and contribute to next-generation NGFW networking capabilities.
• Influence Technical Direction — Drive architectural decisions, IPv6 scalability strategies, and long-term technical roadmap for protocol parity and government/federal compliance (USGv6, IPv6-ready certification, DoD IPv6 mandates).
• Mentorship & Technical Leadership — Serve as the IPv6 subject-matter expert (SME) for the Sonicwall frewall engineering org; mentor senior and mid-level engineers and lead cross-team IPv6 technical design reviews.

Who can apply

• 7- 9+ years of hands-on C/C++ systems-level development for networking platforms — with a strong emphasis on routers, Layer-3 switches, carrier-grade NAT (CGNAT) devices, or network security appliances.
• Deep IPv6 Protocol Expertise — Proven, production-level implementation experience with:
• IPv6 addressing, subnetting, and prefix delegation (DHCPv6-PD)
• Neighbor Discovery Protocol (NDP), Router Advertisements (RA), and MLDv2
• IPv6 routing protocols (OSPFv3, BGP with IPv6 AFI/SAFI, RIPng)
• IPsec/IKEv2 over IPv6 transport
• IPv6 ACLs, PBR, and traffic classification at line rate
• IPv6 transition and coexistence mechanisms (Dual-Stack, 6in4, 6rd, NAT64/DNS64, 464XLAT)
• L2/L3/L4 Networking Depth — Solid understanding of Ethernet, VLANs, 802.1Q, bridging, routing (static and dynamic), NAT, firewall state tables, and VPN tunneling in the context of both IPv4 and IPv6.
• High-Performance Packet Processing — Experience with DPDK, ODP, OFP, XDP/eBPF, or comparable frameworks for low-latency, high-throughput packet forwarding is a strong advantage.

About SonicWall

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