resume.en.md

Resume

Profile

• Name: Yasuharu Goto (後藤 泰陽)
• Date of birth: October 29th, 1984
• Education: Hosei University (Tokyo, Japan) 2004-2007
  • Bachelor of Computer Science
• Social media:
  • Twitter: ono_matope
  • GitHub: matope
  • Blog: 小野マトペの納豆ペペロンチーノ日記
  • Blog (old): 小野マトペの業務日誌(アニメ制作してない篇)
  • Qiita: ono_matope

Summary

• Designed and developped a distributed Object Storage System at Yahoo! JAPAN using Go and Cassandra.
• 5 years of experience in Golang programming.
• Technical leadership experience (up to 6 members)
• Experience in developing / managing a web service personally.
• TOEIC score 780.

Technical skills

• Language: Fluent in Go and working knowledge of C++, Java and PHP.
• Database: Fluent in Cassandra and working knowledge of MySQL.
• OS: Linux (Red Hat based)
• Extremely creative with problem solving skills.

Work experience

Yahoo! JAPAN (2008 - )

• Joined a project to develop a Object Storage as a jounior engineer. (2009-)
• Joined a project to introduce NoSQL distributed database to the company. I had some performance surveys for some Open Source database software. After the introduction of Cassandra, I supported trouble shootings to solve problems happen in the operation. (2012-)
• Designed and developped "Dragon" a new object storage as a tech lead of a small team (2014-).
  • After the launch in Jan 2016, continued to improve the product.
  • Dragon was storing over 11PB and 20Billion objects as at Nov 2017.

Merpay (2019 - 2020)

• Joined to Merpay as an ID platform developer.
  • Released mercari/go-circuitbreaker as an OSS（detail）

Freelance( 2021 - )

• Started working as an freelance engineer since 2021.

Publications

Go

• slide: Introduction to context package (in Japanese / talk as a indivisual) (2016/08/08)
  • Introduced new package "context" that was introduced in Go1.7 at "Go1.7 Release Party in Tokyo".
• mercari.go #12 go-circuitbreakerのご紹介 - Speaker Deck
  • at mercari.go #12 (December/06/2019)

Cassandra

• slide: Cassandra Summit 2016 注目セッション報告 (in Japanese) (2016/10/12)
  • A participation report of Cassandra Summit 2016 at "Cassandra meetup in Tokyo, Fall 2016". I summarized and introduced a presentation on the improvements of storage engine in Cassandra 3.0.

Dragon

• slide: Developping Yahoo! JAPAN's distributed object storage in Go - Go Conference 2017 Spring (3/25/2017)

  • Introduced our case in developing Distributed Object Storage called "Dragon" in Golang at Go Conference 2017 Spring.

• slide: Dragon: A Distributed Object Storage at Yahoo! JAPAN (WebDB Forum … (English version. 9/19/2017)

  • Introduced Dragon's architecture at WebDB Forum 2017 in Ochanomizu-Univ.

• blog: ヤフーの分散オブジェクトストレージ Dragon について - Yahoo! JAPAN Tech Blog (10/12/2017)

  • Published a blog post that share details of Dragon's architecture and considerations on Yahoo! JAPAN's tech-blog.

Open Source Software contributions

Go

• Add support for Expect:100-continue to Go's net/http client.
  • Merged to Go1.6 (5/15/2016)
  • Ticket: net/http: Client support for Expect: 100-continue · Issue #3665 · golang/go
• Reported Github Enterprise support issue in go get. (11/12/2016)
  • Reported an issue that go get can not work with sub-directories in GHE. This issue has been solved by GHE team.
  • Ticket: cmd/go: add support for GitHub Enterprise import path · Issue #17898 · golang/go

Cassandra

• Improved SELECT latency for large partitions by 40% (2016/10/04)
  • Ticket: [CASSANDRA-12731]
  • Merged in Cassandra 3.10.
  • Just small amount of code, but the removal of in-memory cache gained efficiency.
  • Also fixed a bug in compaction process which I found in the work.
• Add Prepared CQL statement to query trace records to improve traceability of query execution performance. (2016/05/06)
  • Ticket: [CASSANDRA-11425]
  • Merged in Cassandra 3.8。
• Investigated and reported a serious data-collapsing bug produced during upgrading to Cassandra 3.0. (3/17/2017)
  • Our team members including me patiently found a way to reproduce the issue which was accidentally found in our cluster.
  • The issue was fixed in priority "Urgent" by the Cassandra committers.
  • Ticket: CASSANDRA-13125, CASSANDRA-13320

others

• gocql
  • I made 9 ontributions which includes bug-fix and improvements to gocql an Cassandra driver for Go.
    • Tickets:Pull Requests · gocql/gocql
• circuitbreaker
  • Had 2 contributions to circuitbreaker which is an Circuit Breaker library for Go including context support.
    • Tickets: Pull Requests · rubyist/circuitbreaker

Personal technical output

• In 2007, Launched a web service called "favotter" which is personally created.
  • Which crawls and ranks "favorites" from Twitter.
  • Recorded 10M Page Views per month at the peek.
• Blog posts
  • gorilla/csrf で安全なWebフォームを作る - 小野マトペの納豆ペペロンチーノ日記
  • ざっくり理解するPaxos - 小野マトペの納豆ペペロンチーノ日記
  • GoとgRPCでKVS的なものを作ってみた - 小野マトペの納豆ペペロンチーノ日記
  • RFC的に、HTTPヘッダってどんな値を使えるんでしたっけ？のメモ - 小野マトペの納豆ペペロンチーノ日記
  • Dynamoの論文を訳した - 小野マトペの納豆ペペロンチーノ日記
• Qiita articles
  • Goの文字列結合のパフォーマンス - Qiita
  • Goのencoding/xmlを使いこなす - Qiita
  • Goでnet/httpを使う時のこまごまとした注意 - Qiita
  • LevelDBの設計ドキュメント和訳 - Qiita
  • JSON Web Encryption (JWE) の解説 - Qiita
• zenn.dev articles
  • 退屈なURLクエリパースは gorilla/schema にやらせよう