Machine Learning Engineer - Recommendation

  • Tokyo
  • No Remote
  • Full-time
  • August 29, 2023
6,000,000 - 33,000,000 JPY /yr
Apply from Anywhere 👍
Relocation to Japan 👍
(Overseas visa sponsorship supported)
Language Requirements
Japanese: Not Required 👍
English: Business Level
Minimum Experience
Junior or above

Job overview

As a Machine Learning (ML) Engineer, you will be responsible for optimizing business-decision-making processes and business effectiveness. You will help the company develop state-of-the-art machine learning models and strategies to speed up the game localization and enhance user experience. Together with our Data team, you will be an integral part of transforming CTW to a data- and AI-driven company. Main tasks include:

  • Build in-game gift package recommendation system and tools, leveraging machine learning technology
  • Understand product objectives and user behavior to apply ML algorithms to optimize gift bundle generation models and improve the production experience
  • Work with cross functional teams to grow our video game business in global markets


Must have

  • Master’s Degree in Computer Science or a related technical field
  • Minimum 2 years relevant work experience
  • Experience in software development through hands on coding in a general purpose programming language
  • Experience in one or more of the following areas: machine learning, recommendation systems, data mining or other related areas
  • Strong analytical and coding skills
  • Good communication, teamwork, inter-team collaboration

Good to have

  • Minimum 3 years relevant work experience from a large-scale internet business
  • Experience in bundle recommendation
  • Adaptable to fast-paced startup environment
  • Passion about technologies and solving challenging problems

Language Requirements

  • Can work in Chinese OR Japanese OR English
  • Can read and understand technical documents in English


  • Visa support
  • Free lunch catering (*after 3 months employment) and early-bird breakfast
  • Free in-office Starbucks, coffee, tea, beverages, snacks, sweets, & vitamins/supplements
  • Modern office space in the heart of Tokyo, with views of Tokyo Tower and Mount Fuji
  • Industry-leading work-life harmony: overtime is rare and discouraged
  • Commute expenses covered
  • 30,000 yen rent support if you live 2 stops from Roppongi 1-chome or Kamiyacho stations
  • Bonus for continuous employment (50,000 yen/month added to base salary after 5 years of continued employment)
  • Health insurance
  • Diverse & international environment
  • Working hours: 10:00 – 19:00, Monday to Friday (in-office)


Founded in 2013, CTW is Japan’s No.1 browser game company. Our primary service is the G123 IP game platform — which publishes video games based on famous Japanese IP.

We’ve been experiencing steady growth in revenue in the past few years as our player base has exploded to over 50 million users worldwide.

We must grow quickly to keep up with market demand.

Our CEO founded and named this company with the aspiration to "Change the World." As a fast-growing startup, we hope our team will drive themselves to try new things and accelerate their careers to match the rapid expansion of the company.

Our core values are - ambition - drive - simplicity

With global hits like Vivid Army, Queen's Blade, and many more, we’re looking to go from a market leader in Japan to an industry leader globally!



Your compensation will be determined based on your experience as well as the whole interview process. Our salary range is as follows:

  • Level 1: 6-9M JPY
  • Level 2: 8-12M JPY
  • Level 3: 10-33M JPY

The first level is for individual contributors (junior positions), while the last level is for senior and management positions.

CTW is a fast-growing Japanese company, running the html5 based platform “G123”.

Currently G123 distributes free-to-play browser games based on popular Japanese brands, including anime and manga properties to global markets.

View CTW's company page

Search jobs from CTW in Japan
Machine Learning Engineer - Recommendation at CTW