Jens Axboe
Team Owner at Axboe Racing LLC
Park City, Utah, United States
Summary
🤩
RockstarJens Axboe is a veteran Linux kernel engineer with 26 years of experience, best known as lead developer and long-term maintainer of the Linux block I/O subsystem and the author of io_uring. He has repeatedly redesigned core I/O stacks (including the 2.5 kernel rewrite and later multi-queue rework), built multiple IO schedulers with hot-swappable modular APIs, and contributed extensive storage drivers and features across IDE, SATA, SCSI, NVMe and SSDs. Jens is a prolific open-source contributor to the mainline Linux tree (notably torvalds/linux), and his tooling work includes fio and btrace which are widely used for storage testing and tracing. He balances deep low-level systems design with practical engineering—implementing zero-copy operations, NVMe fabric fixes, and scalable I/O primitives that underpin modern datacenter storage. Currently splitting his time between Meta, advisory roles in storage startups, and running Axboe Racing LLC, he brings both production-scale impact and a tinkerer’s rigor to performance and reliability challenges. An unusual strength is his habit of rethinking core abstractions rather than incremental patches, which has repeatedly shifted how Linux handles block I/O.
26 years of coding experience
7 years of employment as a software developer
English, Danish
Stackoverflow
146reputation
2kreached
1answer
0questions
Github Skills (18)
filesystem10
system-programming10
rdma10
iscsi10
io-uring10
c1110
linux-kernel10
nvme10
c1710
memory-management9
optmization9
optimisation9
network-protocol9
performance-tuning8
storage8
Programming languages (8)
Github contributions (5)
torvalds/linux
Jan 2023 - Mar 2023
Linux kernel source tree
Role in this project:
Back-end Developer
Back-end DeveloperContributions:43 commits in 2 months
Contributions summary:Jens primarily contributed to the Linux kernel, specifically focusing on the NVMe and io_uring subsystems. Their work involved fixing bugs and improving functionality related to persistent reservations, zero-copy receive operations, and general code cleanup and refactoring. The user demonstrated proficiency in low-level systems programming. These changes focused on various low-level subsystems such as NVMe fabrics, page cache and I/O queuing.
kernellinux-kernellinuxkernel-source
efarrer/blktrace
Sep 2006 - Feb 2012
Contributions:6 commits in 5 years 6 months
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