Alex Markuze
CephFS Kernel Client Maintainer at IBM
Center District, Israel
Summary
🤩
Rockstar🎓
Top SchoolAlex Markuze is a systems researcher and kernel hacker with nine years of experience building high-performance, secure networked systems, currently maintaining the CephFS kernel client at IBM. His background spans low-level networking and storage—from RDMA/DPDK zero-copy transports and custom UDP protocols to TCP splicing in multi-cloud SD-WAN/SASE research—bridging research-grade design with production engineering. He’s contributed performance tooling and networking/health optimizations to the widely followed Aptos core, demonstrating a pragmatic focus on observability and resilient connectivity. A Technion PhD and longtime kernel/driver developer, Alex combines bare-metal performance tuning with security-minded architecture, often surfacing subtle performance wins that aren’t obvious from higher-level metrics.
9 years of coding experience
6 years of employment as a software developer
Ph.D. Computer Science, Ph.D. Computer Science at Technion - Israel Institute of Technology
English, Russian, Hebrew
Github Skills (11)
rust10
io10
devops10
blockchain10
networking9
dockers9
logging9
aptos9
docker9
smart-contracts8
cicd8
Programming languages (3)
Github contributions (5)
aptos-labs/aptos-core
Jul 2022 - Jan 2023
Aptos is a layer 1 blockchain built to support the widespread use of blockchain through better technology and user experience.
Role in this project:
Backend & DevOps Engineer
Backend & DevOps EngineerContributions:78 reviews, 88 commits, 272 PRs in 5 months
Contributions summary:Alex contributed to the Aptos core by implementing profiling tools and configuring tokio-console for performance analysis. They modified logging configurations, added buffered log writes, and introduced a macro for naming tasks when tokio-console is enabled. Furthermore, the user made changes to the networking and health check mechanisms, including resetting health check failure counts and optimizing connectivity. They also implemented tests and configured docker files to enable validator testing.
blockchain-platformblockchainuser-experienceblockchain-networksmart-contracts
groupvrg/ktcp_split
Feb 2018 - Jun 2018
Contributions:5 commits, 196 pushes, 5 branches in 3 months
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