Keisuke Hoshino

kotoage, Inc.

• Providing web services for shrines and temples in Japan to suuport their Digital Transformation.

Contract Software Engieer

• Working as a Senior engineer / Tech Lead.
  
  • Push forward the company by communicating with C level members.
  • Decide the direction of the product with PdM and POs as Tech Lead.
  • Give an advice to business side from technical perspective.
  • Structured the product team(about 80 members) from project based one to product based one that works in scrum methodology as cross-functional team.
  • Adjust release flow among microservices and monolithic repo with QA team.
  • Introduced and educated the Agile/Scrum methodology to the product team.
  • Refactored entire backend code based on DDD w/Rails.
  • Built up a global team from 10% of foreigners to 80%.
  • Educating intern and offshore members.
• Worked as a Lead Frontend engineer.
  
  • Refactored entire frontend code by atomic design w/React.
  • Implemented the backend side in Elixir and Kotlin.
  • Built up a new service that works with AI engine(BERT) in Python from scrach.
• Worked as a Tech Lead in an IoT company.
  
  • Worked on an Android application w/Kotlin that works as the interface of Raspberry Pi, Arduino etc.
  • Built up monitoring environment for the devices.
  • Introduced Agile/Scrum to the team.

Dentolo Deutschland GmbH

• Led IT team as Head of IT. Working in Scrum/Agile team with Project Manager.
  
  • Working with business people to define new features or projects.
  • Estimating timeline of projects and assign members to them.
  • Hiring new members. Having an interview and made a coding challenge for candidates.
• Working as a Ruby/Rails, React.js(redux, webpack etc) engineer.
• Writing some Frontend such as HTML(slim, erb)/CSS with bootstrap4(alpha, beta).
• Implemented and designed entier our architecture and application.
  
  • We have 3 different backends which are for dentists, insurance-partners and business operation team.
  • Designed API for React.js.
  • Enabled to have several landing pages such as written in native Rails, in React.js with CloudFront and S3, in Wordpress etc.
• Refactored whole system based on Domain Driven Design. (Details)
  
  • It was just simple MVC architecture, but getting not maintainable. So that I've rewritten whole code in DDD architecture.
  • Also refactored table structure based on the insight of our business.
• Updated Rails version from 4.2 to 5.1.
• Designed our infrastructure in AWS.

GaiaX Co.Ltd.

• Started 2 new businesses as a manager and a programmer
• Created 2 services using Ruby/Rails. Designed and built the applications, infrastructure on AWS.
• Built a server deployment configuration by Chef.
• Experienced web marketing such as Google Ad, Facebook Ad, Twitter Ad, Yahoo Ad, SNS promotion etc.
• Learend and executed the idea of Lean Startup, Running Lean and Lean Analytics.
• Worked in Berlin and London for half-year to research potential customers.

• Created an incident management tool using Perl/Amon2 and Backbone.js
• Created an asset management tool using Ruby/Rails and Backbone.js
• Conducted replacing PHP project with Ruby/Rails
• Introduced the practice of writing test code

• Created a tool to visualize the status of meeting rooms whether it's available or not. (Ruby/Rails)
• Created a chatbot application for Twitter using PHP
• Made an API for iPhone application using Perl/Catalyst
• Created a tool to manage a personal schedule like GoogleCalendar using PHP/FuelPHP

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Pocket Programming - Ruby/Rails edition -

Pocket Programming - Android/Java edition -

Ed-Tech applications for iPhone/Android written in Swift and Java. These are quiz style applications to learn how to code. We had released the series for learning Ruby/Rails, Java/Android.
(Source Code for iOS / Android)

Position Strategy

An application visualizes company performances.
※ This product had awarded the prize of the Tokyo Stock Exchange contest.
(Source Code On Github)