Taiki (taiki45)

Accounts

Contact

m@taiki.dev

Work Experience

Aug 2022 - Present: Software Engineer, Finatext Ltd., Permanent
Mar 2020 - Aug 2022: Indepedent Financial Trader
- Small market capital stocks in Tokyo Stock Exchange with mainly seconds to hours short-term trading style. Nikkei 225 futures, crypts and commodities like gold, grains, and crude oil were also traded with global macroeconomic view and longer-term perspective.
Jul 2019 - Present: Technical Advisor, Creationline Inc., Contract
- Consult, research, design, review and investigate in service mesh and Kubernetes networking area.
Mar 2019 - Mar 2020: Software Engineer, Tetrate, Permanent
- Data-plane development, mostly GetEnvoy project. Develop and maintain Envoy build pipeline with Bazel to supply Envoy binaries and/or packages for package management systems. One of other works is AWS integration of GetEnvoy and AWS App Mesh.
Mar 2014 - Feb 2019: Software Engineer, Cookpad Japan, Permanent
- At Developer Productivity team. Focusing developer productivity, system reliability and application platform, especially service-to-service communication area.
  
  Cookpad is a med-size technology company having 200+ product developers, 10+ teams, 90 million monthly average users.
  
  Our main work is moving architecture from Monolithic one to Microservices one to achieve large scale software development. While keeping development on our world's largest Ruby on Rails application, split and re-organize our mother system into small piece of systems and make them communicate with each other. Designed system architecture and built application platform, core libraries and tool chain to move distributed environment.
  
  One of biggest my work in this role is building and operating a service mesh to archive both system reliability and product developing efficiency.
  
  Second large aspect of my work is developing backend systems which have responsibility in authorization, notification, managing personally identifiable information. Especially building authorization server is very critical task and needs high scalability. Developed our own database sharding mechanism on it to fits our specific use case.
  
  Another aspect of my work is developing and maintaining core libraries, Continuous Integration and Continuous Delivery tool chain.
Apr 2013 - Feb 2014: Software Engineer, KLab Inc., Permanent
- Develop mobile online game which is working on in-house game engine, working on both of front-end and back-end apps. The number of game users was over 1 million. My main work is building and improving development/release work flow and Continuous Integration and Continuous Delivery tool chain.
Aug 2012 - Mar 2013: Software Engineer, Intern, Klab Inc., Internshi
- Online game back-end app development. Building tool chains which support the game development.

Activities

2023-12-14: Blog post "Adapting Design Docs Practice for Mid-Sized Companies"
2023-11-22: OSS https://github.com/taiki45/gh-action-version
2023-11-17: OSS https://github.com/Finatext/gls
2022-12-19: Blog post "Belldog: to manage and proxy Slack webhooks"
2022-12-02: OSS https://github.com/Finatext/belldog
2019-10-02: Talk "Envoy SDS" at SPIFFE Meetup Tokyo #2
2019-07-29: Talk "入門サービスメッシュ" at NoOps Meetup Tokyo #7
2019-07-23: Talk "Understanding Envoy" at CloudNative Days Tokyo 2019
2019-06-04: Talk "ServiceMesh Day Recap" at Cloud Native Meetup Tokyo #8
2018-12-10: Talk "Building and operating service mesh at mid-size company" at EnvoyCon 2018, co-located event in KubeCon + CloudNativeCon North America 2018
2018-11-28: Talk "クックパッドでのサービスメッシュについて" at Cookpad Tech Kitchen #20
2018-09-07: Talk "Building and operating service mesh at mid-size company" at builderscon tokyo 2018
2018-06-21: Blog post "Service Mesh and Cookpad"
2018-05-08: Blog post "Service Mesh and Cookpad" in Japanese
2018-03-25: Talk "Observability, Service Mesh and Microservices" at Rails Developers Meetup 2018: Day 2
2017-2018: OSS to build service mesh at Cookpad
- https://github.com/cookpad/itacho
- https://github.com/cookpad/sds
- https://github.com/envoyproxy/envoy/pulls?q=is%3Apr+author%3Ataiki45+
2017-09-06: Blog post "クックパッドと分散トレーシング"
2017-05: OSS https://github.com/cookpad/aws-xray
2017-04-03: Blog post "Consumer-Driven Contract testing in Cookpad"
2017-03-31: Talk "Consumer-Driven Contract testing in Cookpad" at ICST meetup event
2017-01-02: OSS https://github.com/taiki45/yajp
2016-06-28: Blog post "実践 Pact:マイクロサービス時代のテストツール"
2016-05: OSS https://github.com/cookpad/denv
2016-01-04: Blog post "サービス分割時の複雑性に対処する: テスト戦略の話"
2015-06-22: Blog post "シンプルで移行しやすいデータベースシャーディング"
2015-06: OSS https://github.com/cookpad/mixed_gauge
2014-12-18: Talk "Cookpad and Microservices" at えびスタ！ ~ 恵比寿スタートアップ勉強会
2014-11-06: Blog post "RESTful Web API 開発をささえる Garage"
2014-05-11: Talk "Haskell でつくる VM 〜散りゆく Endomorphism〜" at 関数型LT大会
2014-04-08: OSS https://github.com/taiki45/hs-vm
2014-02-10: Text https://github.com/taiki45/sugoi-haskell-learning
2014-01-13: OSS https://github.com/taiki45/hs-lisp
2013-05-27: OSS https://github.com/taiki45/shiita
2012-02-22: My first programming project: https://github.com/taiki45/game-of-life

Work Exprerience with Programming Languages

Present
- 2023 - Present: TypeScript (deno)
- 2017 - 2019, 2023 - Present: Rust
- 2017 - 2019, 2022 - Present: Go
- 2012 - Present: Ruby
Past
- 2017 - 2020: C++ 11, C++ 14
- 2013 - 2014: Haskell
- 2013 - 2014: Lua
- 2012 - 2013, 2019 - 2022: Python
- 2012 - 2013: PHP

Education

2008 - 2013: Bachelor's degree, Language and Foreign Studies, Tokyo University of Foreign Studies