Hajime Tazaki
Senior Researcher at WIDE Project
Japan
Summary
👤
Senior🎓
Top SchoolHajime Tazaki is a senior researcher and network systems engineer with 19 years of experience accelerating network protocol development, LibOS architecture, testing frameworks, and deep protocol simulation. Based in Japan, he has led applied research at IIJ and academia (The University of Tokyo, Keio) where he bridged mobile and fixed-network architecture research—authoring work on Mobile IPv6 and a “Floating Ground” mobile Internet design. His hands-on background spans production network stacks, routing suites, and deployment-grade engineering from PFU to large research testbeds, plus practical LibOS and userspace network stack integrations. An active open-source contributor, he has fixed low-level raw-socket behavior in ns-3 and enabled containerd support on macOS, showing a rare blend of protocol-level expertise and cross-platform runtime pragmatism.
19 years of coding experience
16 years of employment as a software developer
Master, Engineering, Master, Engineering at Chiba UniversityPh.D, Media and Governance (Computer Science), Ph.D, Media and Governance (Computer Science) at Keio University
English, Japanese
Github Skills (21)
debug10
container10
c-language10
multiplatform10
testing10
cross-platform10
network-programming10
cnc10
containerd10
socket10
go10
ipv410
macos10
cprogramming-language10
platform-independent10
Programming languages (9)
Github contributions (5)
nsnam/ns-3-dev-git
Mar 2010 - Jan 2014
GitHub read-only mirror of ns-3-dev repository, will be kept in sync with main GitLab.com repository. Please DO NOT file pull requests here; instead, file issues and merge requests at https://gitlab.com/nsnam/ns-3-dev/
Role in this project:
Back-end Developer
Back-end DeveloperContributions:32 commits in 3 years 10 months
Contributions summary:Hajime's contributions focused on bug fixes and enhancements to the ns-3-dev repository, which is a read-only mirror of the ns-3-dev repository. Their work involved addressing issues related to raw sockets, including fixing incorrect return values and ensuring proper handling of address information. The user also implemented support for the MSG_PEEK option and the IP_HDRINCL option for IPv4 raw sockets, demonstrating a deep understanding of network programming. Additionally, they added test code to validate the implemented functionalities.
twinedevsyncgitlabmerge-requests
containerd/containerd
Sep 2020 - Oct 2021
An open and reliable container runtime
Role in this project:Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:54 reviews, 5 commits, 7 PRs in 1 year 1 month
Contributions summary:Hajime primarily focused on enabling and supporting the containerd runtime on the darwin platform, specifically macOS. Their contributions included addressing build and test failures, implementing specific support, and updating dependencies for proper functionality. Furthermore, the user made updates to support darwin, demonstrating expertise in cross-platform compatibility within a container runtime environment.
containersisolationcontainerdrustruntime
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