Stephen Sun
Sr. Software Engineer at NVIDIA
Pudong, Shanghai, China
Summary
🤩
Rockstar🎓
Top SchoolStephen Sun is a senior software engineer with 12+ years focused on high-performance networking and platform software, currently at NVIDIA in Pudong, Shanghai. He has deep domain expertise in SONiC and Mellanox platforms, contributing to core projects like sonic-swss, sonic-buildimage, and sonic-platform-common where he solved tricky buffer management, QoS dependency leaks, and SFP monitoring issues. His background spans hands-on platform API design, build automation, and DevOps improvements that ensure reliable service startup and deployment in containerized environments. Previously he led switch engineering at Shanghai Baud and worked at Mellanox and Huawei, blending hardware-aware software design with operational pragmatism. Notably, he implemented fixes for zero-buffer PFC storm handling and introduced dynamic buffer/headroom features that address real-world network edge cases. He combines system-level problem solving with practical tooling enhancements, making him effective at bridging hardware, firmware, and infrastructure software.
12 years of coding experience
20 years of employment as a software developer
Bachelor's degree, Computer Science And Technology, Bachelor's degree, Computer Science And Technology at 南京大学Nankai Middle School
Github Skills (46)
network-configuration10
mellanox10
docker10
c-language10
buffering10
buffer10
sonic10
python10
apidoc10
testing10
configuration-management10
command-line-interface10
abstraction10
abstraction-layer10
dockers10
Programming languages (8)
Github contributions (5)
sonic-net/sonic-utilities
Jul 2019 - Dec 2022
Command line utilities for the SONiC project
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:126 reviews, 54 commits, 54 PRs in 3 years 6 months
Contributions summary:Stephen primarily contributed to improving and extending command-line utilities for the SONiC project, focusing on the Mellanox platform. Their work involved enhancing the SDK sniffer command with disk space usage prompts, modifying service restart processes, and adding features like dynamic buffer calculation and shared headroom pool support. Additionally, the user implemented and improved the `sfputil` tool for SFP error status reporting and buffer management.
command-linesonic
sonic-net/sonic-platform-common
Jul 2019 - Nov 2022
Python packages which provide a common interface to platform-specific hardware peripherals in SONiC
Role in this project:Back-end Developer
Back-end DeveloperContributions:17 reviews, 16 commits, 22 PRs in 3 years 5 months
Contributions summary:Stephen primarily contributed to the `sonic-platform-common` repository by adding support for SFP (Small Form-factor Pluggable) modules, including the parsing and implementation of various control bytes, options, and monitoring features. They also introduced new APIs for SFP error status and port/cage type support within the chassis. Their work involved modifying Python packages and expanding functionality related to transceiver threshold warnings and alarms, demonstrating a focus on hardware-specific interface development and system monitoring within the SONiC platform.
hardwareplatform-specificpythonsonic
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