Staff Software Eng, Kernel Network at eBay

At eBay were more than a global ecommerce leader were changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. Were committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts.Our customers are our compass authenticity thrives bold ideas are welcome and everyone can bring their unique selves to work every day. Were in this together sustaining the future of our customers our company and our planet.Join a team of passionate thinkers innovators and dreamers and help us connect people and build communities to create economic opportunity for all.About the team and the role:The Traffic team is responsible for the reliability performance and security of network traffic across our edge and core infrastructure. We design and operate high-throughput low-latency data paths evolve our kernel and userspace networking stack and build observability that powers real-time insight and rapid incident response. Our work spans L4/L7 load balancing service mesh/data plane packet processing congestion control routing and traffic policy enforcement.We are seeking an experienced engineer (10 years) with deep expertise in the Linux kernel networking stack and production observability to lead design and implementation of high-performance data planes and visibility tooling. You will own system-critical components influence architecture across teams and mentor engineers while delivering measurable improvements to throughput latency and reliability.What you will accomplish:Design implement and optimize kernel-level networking components (TCP/UDP QUIC congestion control sockets netfilter XDP/AFXDP eBPF) for high-scale production environmentsBuild and evolve data planes for L4/L7 traffic management including load balancers proxies NAT firewalling rate limiting and traffic shapingDevelop robust observability for the networking stack: eBPF-based telemetry tracing packet capture flow logs performance counters and SLO/SLA instrumentationLead initiatives to reduce tail latency improve throughput and decrease resource utilization via kernel/userspace tuning scheduling NUMA/IRQ affinity offloads and memory managementArchitect and deploy scalable traffic systems across multi-region multi-tenant environments with zero-downtime rollouts and rapid incident recoveryPartner with SRE Security and Platform teams on traffic policy DDoS mitigation TLS/PKI and compliance requirementsDrive roadmap technical strategy and cross-functional execution; provide technical leadership and mentorship to the teamConduct rigorous benchmarking and capacity planning; define performance baselines and regression gatesOwn production health: participate in on-call rotations root-cause analysis and corrective action plansWhat you will bring:10 years of software engineering with significant experience in Linux kernel networking and high-performance systems.Expert-level knowledge of kernel networking subsystems: sockets TCP/IP stack routing netfilter/iptables/nftables XDP/AFXDP eBPF.Strong systems programming skills in C/C and familiarity with Rust or Go for userspace components.Proven experience building and operating large-scale traffic systems (load balancers proxies packet processors) in production.Hands-on expertise with observability: metrics logs tracing eBPF probes perf/tracepoints tcpdump pcaps and performance analysis tools.Deep understanding of performance tuning: NIC offloads DPDK or kernel-bypass techniques IRQ/queue management NUMA memory allocators lock contention and scheduler behavior.Solid knowledge of L4/L7 protocols (TCP QUIC TLS HTTP/2/3) congestion control and transport/security internals.Experience with cloud or bare-metal environments container orchestration (Kubernetes) service discovery and service mesh patterns.Strong debugging skills across kernel/userspace boundaries; ability to analyze crashes deadlocks and performance pathologies.Preferred Qualifications:Contributions to Linux kernel eBPF tools or relevant open source projects (Cilium Envoy NGINX HAProxy Calico DPDK).Experience with programmable data planes SRv6 BGP/ECMP anycast and multi-cluster traffic routing.Background in security for networking stacks: firewalling ACLs mTLS DDoS detection/mitigation bot defense.Experience building self-service traffic platforms and developer-facing APIs/SDKs.Knowledge of hardware acceleration: SmartNICs ASICs FPGA-based offload and NIC telemetry.Experience with time synchronization and precision timing (PTP) clocking and its impact on networking performance.#LI-HybridThe base pay range for this position is expected in the range below:$190400 - $254200Base pay offered may vary depending on multiple individualized factors including location skills and experience. The total compensation package for this position may also include other elements including a target bonus and restricted stock units (as applicable) in addition to a full range of medical financial and/or other benefits (including 401(k) eligibility and various paid time off benefits such as PTO and parental leave). Details of participation in these benefit plans will be provided if an employee receives an offer of employment.If hired employees will be in an at-will position and the Company reserves the right to modify base salary (as well as any other discretionary payment or compensation program) at any time including for reasons related to individual performance Company or individual department/team performance and market factors.Please see the Talent Privacy Noticefor information regarding how eBay handles your personal data collected when you use the eBay Careers website or apply for a job with eBay.eBay is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race color religion national origin sex sexual orientation gender identity veteran status and disability or other legally protected you have a need that requires accommodation please contact us at. We will make every effort to respond to your request for accommodation as soon as possible. View our accessibility statement to learn more about eBays commitment to ensuring digital accessibility for people with disabilities. It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.The eBay Jobs website uses cookies to enhance your experience. By continuing to browse the site you agree to our use of cookies. Visit our Privacy Center for more information.Required Experience:Staff IC Key Skills Campaigns,JSP,Dhtml,Loans,Automobile Employment Type : Full-Time Experience: years Vacancy: 1 Monthly Salary Salary: 190400 - 254200