Senior Software Engineer — Embedded C / Firewall Client

About the role

This module intercepts live traffic, queries the CFS rating servers in real time, and enforces URL-based content filtering policies at the packet level. This is security-critical code: a policy bug is a traffic bypass on a deployed security appliance. The codebase is in C with a split Control Plane / Data Plane architecture, multi-blade cache synchronization, and multiple firmware version upgrade paths.

What you'll do

• Maintain, harden, and extend the CFS client module across both the control plane and data plane
• Own the binary UDP protocol implementation between the firewall and the CFS rating servers, ensuring correctness and compatibility across protocol versions
• Develop and maintain complete IPv4 and IPv6 support across all code paths
• Own the firmware upgrade and migration paths, ensuring they are atomic, failure-safe, and correctly handle all supported version transitions
• Improve reliability of inter-blade cache synchronization on multi-blade appliances

What you need

• 8–14 yrs of experience
• Firewalls
• Embedded C
• Networking
• C++
• C
• Network security
• PhD or B.Tech or B.E. or B.Sc or BCA