Education

• Department of Computer Science & Engineering at Shinshu Univerisity
• kstm

Interests

• Competitive Programming
• TCP/IP
• Dynamic Routing
• Container
• Deploy Automation

Social Network

• Github
• Twitter
• Facebook
• Blog

Experience

• Yamareco Inc. - parttime jobs, Web Development / Leaflet.js / Mapnik
• Tullys Coffee - parttime jobs
• pixiv Inc. - internship, Web Development / React.js
• Cookpad Inc. - internship, Lecture
• Wantedly, Inc. - internship, Infrastructure

Software

• Open Compiler is an online compiler which build your code and execute on our build network.

Tools

• ssh-shots sends config to routers / switches using SSH in a single binary.
• ping is a single binary ping command.
• loader HTTP Load tester written in Go
• prefix-aggregator is a command-line tool for aggregating IPv4 prefixes.
• lego-lambda validate with DNS01(Route 53) and generate certificates on lambda.

On-Site Competitions

• PC Koushien 2013 Final round
• CODE THANKS FESTIVAL 2015
• CODE RUNNER 2015 Final round
• ICT TroubleShooting Contest 6
• ISUCON 8 Final
• ICPC 2018 Asia Yokohama Regional

Participations

• CODE FESTIVAL PRACTICE 2015
• Ritsumeikan University Programming Contest
• Chainer Meet Up #02
• Classroom of Ocean and Earth in Tohoku
• CTF for Beginners 2016 in Nagano
• CODE FESTIVAL PRACTICE 2016
• pixiv 2016 SUMMER BOOT CAMP
• Wantedly Summer Instern 2017
• Cookpad SUMMER INTERNSHIP 2017
• Okinawa Open Laboratory Specialist Development Program 2017

Posts

• EDNS Client Subnet (ECS) とは - October 28, 2019
• Hello,World ! - July 14, 2016

…or you can find more in the archives.

Notes

• Python Networking - April 29, 2023
• IPv6 basics - August 29, 2022
• SSL/TLS Basics - July 19, 2022
• ICMP - July 18, 2022
• TCP Basics - January 18, 2022
• Load Balancing basics - January 18, 2021
• Notes - July 14, 2016