Cactus is a software development company, providing full-cycle services for the European market. More than 170 companies increased business productivity using solutions developed by Cactus experts. The company has been regularly included in the listings of the best software development companies in Belgium and Europe.
Design and implement high-performance packet I/O pipelines using DPDK or equivalent frameworks.
Configure and tune Linux servers for ultra-low latency: hugepages, NUMA awareness, CPU pinning, NIC driver binding, RSS/flow steering.
Stay current with RDMA and user-space networking trends (DPDK, netmap, AF_XDP, eBPF/XDP) to evaluate trade-offs.
Expert C/C++ in performance-critical networking code.
Strong knowledge of Linux performance tuning and NIC hardware features (RSS, flow steering, checksum/jumbo offloads).
Experience with packet capture/analysis tools (tcpdump, Wireshark, perf).
Strong problem-solving and debugging skills at the network + OS boundary.
Excellent English communication skills – written and spoken.
*High-frequency trading (HFT) / fintech — ultra-low-latency networking engineers.
Network security & DPI appliances — intrusion detection/firewall data plane developers.
CDN / video streaming / media transport — high-performance transport engineers.
HPC / storage networking — experience with RDMA, NVMe-oF, or cluster interconnects.
Full-time position with a competitive salary and benefits, including learning opportunities.
Flexible working hours.