Junhua Zhai
Senior Software Engineer at NVIDIA
Chaoyang District, Beijing, China
Summary
🤩
Rockstar🎓
Top SchoolJunhua Zhai is a senior software engineer with nearly two decades of networking and systems experience, currently at NVIDIA after a recent tenure building Azure Networking features for SONiC at Microsoft. He specializes in C/C++, TCP/IP, Linux kernel and platform integration, with deep hands-on work in SONiC build, switch-state services and MACsec test automation. Junhua’s contributions span build and deployment tooling, backend switch-state logic and comprehensive QA/test frameworks—improving multi-platform support, gearbox features and MACsec interoperability and counters. His background in firewall product design at Juniper and early work on WAN acceleration informs a pragmatic approach to reliability and performance in production network software. Based in Beijing, he pairs a master’s in applied mathematics with a habit of advancing test infrastructure to surface subtle correctness issues before they reach silicon.
4 years of coding experience
20 years of employment as a software developer
Bachelor, Information Engineering, Bachelor, Information Engineering at Nanjing University of Posts and TelecommunicationsMaster, Applied Mathematics, Master, Applied Mathematics at Beijing University of Posts and Telecommunications
Github Skills (23)
docker10
c-language10
sonic10
pytest10
python10
redis10
testing10
configuration-management10
bash10
dockers10
lua10
build-automation10
macos10
cprogramming-language10
devops10
Programming languages (4)
Github contributions (5)
sonic-net/sonic-swss-common
Sep 2021 - Jun 2022
Common components for SONiC switch state service
Role in this project:
Back-end Developer
Back-end DeveloperContributions:27 reviews, 9 commits, 17 PRs in 9 months
Contributions summary:Junhua primarily contributed to the back-end logic of the SONiC switch state service. Their work focused on modifying channel names and integrating database IDs within the `sonic-swss-common` repository. This involved changes to `table.h`, and multiple `.cpp` files to incorporate database IDs into the channel naming scheme, and also included adding a new counter table. The user also addressed a revert and subsequently added an update based on a fix from a separate pull request.
common-componentsstate-managementsonicswitch
sonic-net/sonic-buildimage
Aug 2021 - Nov 2022
Scripts which perform an installable binary image build for SONiC
Role in this project:Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:42 reviews, 37 commits, 62 PRs in 1 year 2 months
Contributions summary:Junhua primarily contributed to the build and deployment infrastructure for SONiC, focusing on enhancing the "gearbox" feature set. Their work involved modifying build scripts, Dockerfiles, and configuration files to support new hardware, integrate firmware, and ensure proper service startup. The user also addressed bug fixes, optimized configurations, and upgraded the base image for the gbsyncd container. The user further enhanced the codebase to incorporate multi-platform support and incorporate the use of the latest versions of the SAI library and tools.
armv6installableimage-buildsonicbinary-image
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