Stephen Hemminger
Principal Software Engineering Manager at Microsoft
Aurora, Oregon, United States
Summary
🤩
Rockstar🎓
Top SchoolStephen Hemminger is a Principal Software Engineering Manager with over 22 years building and leading low-level networking and systems software, currently focused on Linux on Hyper-V/Azure at Microsoft. He combines deep kernel and networking expertise—evident from long-running contributions to projects like iproute2 and CZMQ—with practical experience in database replication and Unix/Plan 9-era designs. His career spans hands-on driver and protocol development (Tektronix, nCube) to architecting networking products (Vyatta/Brocade) and research-focused kernel work at the Linux Foundation and OSDL. Known for refactoring and stabilizing critical networking code, he has a knack for replacing brittle macros with robust implementations and improving observability of kernel networking stats. Based in Aurora, Oregon, he pairs a Dartmouth engineering background with a rare tolerance for both legacy Unix idiosyncrasies and modern cloud integration challenges. Beyond leadership, he remains an active, pragmatic open-source contributor who still patches kernel headers and low-level networking internals.
22 years of coding experience
27 years of employment as a software developer
ME Engineering, ME Engineering at Dartmouth College
French
Github Skills (17)
zeromq10
lib10
system-programming10
headers10
netmq10
code-library10
mq10
c-programming10
c1110
c1710
header-files10
network-protocol10
protocols10
documentation8
kernel8
Programming languages (12)
Github contributions (5)
iproute2/iproute2
Apr 2004 - Jan 2023
Iproute2 Source Code Mirror - This is a publish-only repository. Please follow README.devel procedure for any changes.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1898 commits, 16 PRs, 304 pushes in 19 years
Contributions summary:Stephen primarily contributed to low-level networking code within the iproute2 project. Their work focused on updating and maintaining kernel header files related to networking, including updates to `if_link.h`, and handling various attributes and statistics. They also refactored and optimized code in `devlink.c`, replacing macros with functions, introducing support for displaying statistics, and generally improving the structure of the code.
linuxrouting
zeromq/czmq
May 2013 - Mar 2014
High-level C binding for ØMQ
Role in this project:Back-end Developer
Back-end DeveloperContributions:10 commits in 10 months
Contributions summary:Stephen primarily focused on fixing bugs and improving the codebase of the CZMQ library, a high-level C binding for ØMQ. Their contributions include resolving unused variable errors in the zcurve module, fixing prototype mismatches in zsockopt, and adding support for the ztree data structure. Additionally, the user addressed sparse warnings and made improvements to documentation and tests, enhancing the library's stability and functionality. The user also updated the codebase to switch to an alternative red-black tree implementation, indicating a deeper understanding of the underlying data structures.
multiplexerhigh-levelgossipbinding
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