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Curriculum Vitae

Profile

key value
Name Ryo Shirai
GitHub https://github.com/kaito0228
Blog https://kaito0228.hatenablog.com/
Twitter https://twitter.com/kaito2280
Qiita https://qiita.com/a________________________kaito
Wantedly https://www.wantedly.com/id/ryo_shirai228
LAPRAS https://lapras.com/public/GZ3NTRI
LinkedIn https://www.linkedin.com/in/ryo-shirai/
AtCoder https://atcoder.jp/user/kaito2280

Skill

Language

  • Programming
    • Ruby
    • JavaScript
    • TypeScript
    • Java
  • Japanese
    • Native
  • English
    • Interacting with overseas development team via text / WebMTG and document confirmation

Framework/Library

  • Ruby on Rails
  • React
  • Angular

Other

  • Engineering Team Management
  • Business Development
  • Recruitment

Career

2018/04 - 2019/02 : Works Applications Co., Ltd.

【Services】

Development and sales of ERP packages for major companies No.1 share in Japan

【Duties】

Specification design, specification answer, introduction support, business improvement, documentation around the approval business in the business infrastructure department

【Business description】

  • Exclusive control design of products
  • Created a function reference of about 200 pages using AsciiDoc
  • Created CassandraER diagram automatic generation tool
  • Progress confirmation and management of Shanghai developer
  • Creation of specification answer materials for customers
  • Wire frame design for improvement request function using Cacoo
  • Functional specification formulation

2019/03 - 2019/12 : Toremoro Inc.

【Services】

Development of ASMR video App

【Duties】

Server side engineer, Web front engineer, Business development, Data analysis, Management

【Business description】

  • Server side, Web front development
    • Development of various APIs
    • Created management screens used by affiliated creators (React, JavaScript, Recharts, MongoDB, tagify, datepicker, sorcery)
    • Ranking function (Redis)
    • Push notification (firebase_cloud_messenger)
    • Direct video upload (ActiveStorage, JavaScript, S3)
    • Search function / index (Algolia, mecab)
    • Server load optimization (AlgoliaIndexing, puma_worker_killer, New Relic, Logentries)
    • Ruby / Rails / gem / npm version up
  • Service planning
  • Data base organization / log analysis (Firebase, Heroku, PostgreSQL, Google Sheets, BigQuery, DataStudio, AppStoreConnect, AppFollow, AppAnnie)
  • Tool creation for business improvement / video analysis (Ruby, Python, GAS, Slack)
  • Ad operations (Apple Search Ads, Google Ads)
  • Planning and analysis of video content

2020/01 - : Kaizen Platform Inc.

【Services】

Development and operation of "Kaizen Platform" and "Kaizen Ad"

  • "Kaizen Platform" Growth hacker network platform for requesting improvement proposals from professionals around the world

  • "Kaizen Ad" Video ad improvement service

【Duties】

Application engineer

【Business description】

  • Server side development
    • Development of advertising search function (Cloud Search)