Zhenggen Xu
Sr Staff Software Engineer @Linkedin
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WORK HISTORY
Sr Staff Software Engineer @Linkedin
Sunnyvale, US
HW/SW strategies for Network Team at LinkedIn. • Founding member, tech lead/manager for LinkedIn Network OS (LNOS)/SONiC development team. Multi-vendor platform onboarding, LNOS deployment/upgrade at scale (with hitless upgrade), real time telemetry and auto-remediation.• SONiC community leadership/influencer/code contributor.• Fleetwide network performance tuning (TCP tuning, NIC tuning) and end-to-end QoS R&D and Deployment.• Networking Congestion Management with DCTCP and Auto-FlowLabel, BBR3 adoption for long RTT traffic. • RoCEv2 with PFC/DCQCN/ECN on various platforms and use cases.• HPC/AI frontend and backend networking with Broadcom/Nvidia/Cisco solutions for GPU Storage and Compute.• Kubernetes pod networking (Flannel, IPVLAN) and RoCE integration
EDUCATION
Huazhong University of Science and Technology
Master, EE
SKILLS
ABOUT ZHENGGEN XU
I am a seasoned Senior Staff Software Engineer with 20+ years of experience designing, building, and operating hyperscale production data-center networks across silicon, network operating systems, and infrastructure. Proven technical leader in custom SONiC NOS development, switch platform bring-up, ASIC SDK/SAI integration and AI fabric design and deployment.Deep expertise spanning switch ASICs/NPUs, Linux kernel integration and driver alignment, hardware debugging, CI/CD pipelines, congestion-controlled fabrics (RoCEv2/TCP) and fleet-scale reliability engineering. Specialist Areas Network Operation System including SONiCRDMA/RoCEv2 and congestion management in HPC & storage networks Kubernetes pod networking (Flannel, IPVLAN), RoCE integration, and host networking QoS and DCTCP Fleet-wide NIC tuning and protocol stack optimizationEnd-to-end debugging and resolution of complex distributed system failures
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