Senior MCX Core Engineer
Samsung👥 10,000+ employees🏢 Consumer Electronics
Join Samsung Networks Europe as a Senior MCX Core Engineer, leading the testing and operational availability of mission-critical solutions in a dynamic team environment.
Senior Software Engineer — Embedded C / Firewall Client
📅 Jul 9
C ProgrammingMulti-core ConcurrencyKernel-level NetworkingIpv4
📜 Description
- 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.
- Develop and maintain complete IPv4 and IPv6 support across all code paths.
- Own the firmware upgrade and migration paths, ensuring they are atomic and failure-safe.
- Improve reliability of inter-blade cache synchronization on multi-blade appliances.
- Document the concurrency model and collaborate with server-side teams.
🛠️ Requirements
- Expert-level C (not C++): disciplined manual memory management, pointer arithmetic, and systems design.
- Multi-core concurrency in C: reader-writer locks, spinlocks, atomic operations, and memory ordering.
- Kernel-level networking: deep understanding of how a packet moves through a firewall dataplane — TCP/UDP processing, flow cache, connection tracking. Userspace socket programming alone is not sufficient.
- Strong IPv4 and IPv6 across all code paths.
- Comfortable navigating and owning a large C codebase with multiple subsystems.
- Experience with network testing and debugging tools: packet capture (Wireshark/tcpdump), traffic generators, GDB.
- Good written English for remote, asynchronous collaboration.
- Experience with multi-blade or multi-ASIC hardware platforms (Octeon/CVMX or similar).
- Understanding of symmetric encryption (AES-CBC, DES) at the C implementation level.
- Prior experience on a security appliance, network device, or UTM firmware codebase.
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