Experience

Treasure Data

• United States
• Software Development
• 400 - 500 Employee

• Principal Software Engineer

  • Mar 2022 - Present



Cookpad

• United Kingdom
• IT Services and IT Consulting
• 100 - 200 Employee

• Senior Data Engineer

  • Jun 2013 - Mar 2022

  # 2019 - 2020: Project manager (no division) I participated in the Cookpad smartphone app renewal project as a side work (this was continued from previous renewal project). In that project, I managed over 20 developers in this team as a project manager. This project added two new microservices and rewritten almost all views of Cookpad iOS app. # 2017 - 2019: Senior software engineer (no division) I participated in the Cookpad renewal project as a side work. In that project, I developed API orchestration layer which utilizes asynchronous I/O via reactive programming technology, using Spring WebFlux and Spring Reactor. # 2015 - current: Senior data engineer in the Technology division As the leader of data warehouse team, I developed enterprise DWH (data warehouse) on the Amazon Redshift cluster. The DWH system included the data ingestion system (master tables and logs), the batch system using Bricolage, and the data exportation system. I mainly developed the log ingestion system. # 2014 - 2015: Senior data engineer in the Advertisement division I developed private DMP (data management platform) on the Amazon Redshift cluster. It enables Cookpad to serve targeting ads. # 2013 - 2014: Senior data engineer in the Corporate management division I developed Tabemiru, that is search analytics services of Cookpad. As the only engineer of Tabemiru team, I designed, developed and maintained the entier Tabemiru system. It utilizes Amazon Redshift. I also developed my own batch framework Bricolage and it was used to build Tabemiru data. - Tabemiru: https://ad.cookpad.jp/tabemiru/ - Bricolage: https://github.com/bricolages/bricolage Show less



Teradata

• United States
• Software Development
• 700 & Above Employee

• Consultant

  • Apr 2007 - May 2013

  ## 2011-2013: Pre-sales engineer in the Big Analytics division I was responsible for introducing Aster Data parallel database to the new clients. Aster was the newest Teradata's database product. ## 2008-2011: Software engineer in the Professional Services division I was mainly responsible for developing the corporate's own batch job framework, called BatchWalker. As an only developer of BatchWalker, I was in charge of entire development process of it, from architecture design to implementation, testing, documentation and education. Earlier version of BatchWalker is written in Unix shell script (ksh) but later I rewritten it in Java. ## 2007-2008: Consultant in the Telecom division I was responsible for developing customer's DWH system. I was a team member of large development team, and was responsible for developing DWH batch jobs written in shell script. Show less