Debug and optimize network performance end-to-end: NIC tuning, congestion control, packet pacing, queueing disciplines
Analyze traffic using tcpdump, Wireshark, and custom tooling; reason about protocol behavior under load
Work with protocols beyond TCP/UDP when required (e.g., ICMP, IGMP, multicast)
Experience with high-performance I/O and kernel-bypass techniques such as DPDK, XDP, io_uring, or similar
Read and reason about Linux kernel source when debugging requires it
Understand networking stack internals (socket buffers, congestion control, netfilter, scheduling interactions)
Build bespoke tooling when existing observability is insufficient
Work fluently with kernel interfaces used by performance-sensitive systems
Use hardware performance counters, perf, eBPF, and flamegraphs to locate real bottlenecks
Reason about practical CPU behavior: cacheline contention, branch misprediction, NUMA effects, memory ordering
Understand IRQ affinity, scheduling behavior, paging, and TLB effects under real workloads
Strong low-level systems programming background
We work primarily in Rust, but strong experience in C or C++ is equally relevant
Solid understanding of algorithms, data structures, and writing correct concurrent code
Contribute to infrastructure, tooling, and occasionally upstream projects

Requirements

10+ years of experience in systems programming, networking, or performance-critical infrastructure
Deep Linux expertise, including kernel behavior, networking internals, and performance tuning
Proficiency with packet analysis and network debugging tools
Experience with performance profiling and tracing (perf, eBPF, flamegraphs, etc.)
Strong programming fundamentals; depth matters more than language
Track record of diagnosing complex issues spanning application, OS, and hardware layers
Clear, direct communication.

Benefits

Salary based on experience
Above-market total compensation and multiple forms of equity
100% employer-paid health benefits
All-expenses-paid team retreats and conferences
Weekly meal voucher

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

network performance optimizationNIC tuningcongestion controlpacket pacingkernel-bypass techniquesDPDKXDPio_uringlow-level systems programmingconcurrent code

Soft Skills

clear communicationdirect communication