Takuya Kitazawa

About me

  • M.S. in Information Science and Technology, specialized in recommender systems
  • 6+ years of hands-on experience as a Software Engineer, OSS Developer, Data Scientist, and Machine Learning Engineer
  • Developing consumer-facing web/mobile applications and their backend infrastructure
  • Deploying ML solutions to an enterprise-grade big data analytics platform
  • Wearing many hats in global teams, ranging from Technical Evangelist and Pre-Sales Engineer to Solution Architect and Product Manager, as a bilingual customer-centric product developer

02/2020 – Present

Senior Product Manager

Arm Treasure Data, Tokyo, Japan

04/2019 – 02/2020

Staff Engineer

Arm Treasure Data, Tokyo, Japan

07/2018 – 03/2019

Senior Engineer

Arm Treasure Data, Tokyo, Japan

02/2017 – 07/2018

Data Science Engineer

Treasure Data, Tokyo, Japan

(Acquired by Arm)

  • Regularly contributed to the development of Apache Hivemall, a scalable ML library running on Apache Hive and Spark.
  • Led the development of out-of-the-box ML applications from competitor analysis and product requirement documentation to system implementation and customer onboarding.

12/2016 – 01/2017

R&D Intern

Silver Egg Technology, Tokyo, Japan

Developed recommendation algorithms for customers' purchase data on a real-world e-commerce service.

08/2016 – 09/2016

Machine Learning Intern

Treasure Data, Tokyo, Japan

  • Implemented an anomaly detection system for Datadog multiple metrics.
  • Developed Hive UDFs for recommendation and anomaly detection.

10/2015 – 06/2016

Part-time Software Engineer

08/2015 – 09/2015

Software Engineering Intern

Rakuten Institute of Technology, Tokyo, Japan

Worked on a real-world recommender system for a golf booking service.

02/2012 – 02/2013

Part-time Software Engineer


Developed PHP applications for a Japanese avatar-based social networking service, and an iOS application for virtual trial fitting using an image blending algorithm named Poisson Image Blending.

10/2011 – 03/2013

Research Assistant / Web Developer

The University of Aizu, Fukushima, Japan

Developed a web application "Aizu Weather" for regional weather monitoring. Implemented interactive geospatial data visualization with Ruby on Rails and D3.js.


04/2015 – 03/2017

M.S. in Information Science and Technology

The University of Tokyo, Tokyo, Japan

Thesis: Persistently Cold-Starting Online Item Recommendation for Implicit Feedback Data

Advisor: Dr. Takayasu Matsuo

GPA: 4.0


04/2011 – 03/2015

B.S. in Computer Science and Engineering

The University of Aizu, Fukushima, Japan

Thesis: User Modeling in Folksonomies: Relational Clustering and Tag Weighting

Advisor: Dr. Masahide Sugiyama

GPA: 3.97

Honors and Awards:


  • Served as a teaching assistant in a Numerical Analysis course, and thought Java coding of numerical methods to 20+ undergraduates (Fall 2014)
  • Participated in Security and Programming Camp 2011 to deepen knowledge in web security (Aug 2011)