Lead Full-Stack Engineer for Start-Up with International Enviorment (Future CTO)

Full stack engineer

AWS Ruby on Rails JavaScript C++ C C# Python Ruby Scala Go PHP

About the company
A group company of one of the leading telecommunications companies in Japan. The company works in the internet advertising industry. Their main focus is to provide services for companies to eliminate ad fraud in the internet advertising industry. Many of their clients use their service to ensure proper placement and effectiveness of their ads while removing fraudulent ads taking advantage of their advertisements, this ensures brand safety. They are the first to implement this in Japan and their product has been certified as Japan’s first trusted partner from the world’s highest level TAG in ad-fraud protection and brand safety.
Corporate Culture
They are trying to make the best environment for their engineers thus have no core working hours and is completely flex time.
Your abilities are more important than your loyalty to the company.
As the company is a small team, you are working together closely with your team and they are very open to your ideas to improve yourself and the company.
Always like those who want to challenge new ideas and tasks
Global Aspects
  • Deal with global projects
  • Already foreign employee(s) working
  • CEO/Executive is a foreigner
  • Communicate with foreign clients
  • Official Language is English
  • International sales
  • Actively pursuing diversity at the work place
  • Market research overseas
PR Aspects
-They welcome any candidates, even if you don’t have Japanese.
-As they are backed by a larger company. They will always have funding to challenge new ideas.
-They are located with their larger company thus all the facilities and amenities are also provided.
You will be in charge of leading the team with the CTO and developing Japan's largest scale Ad tool in the Go language, utilizing AI · Natural Language Processing.

You will develop and operate programs on their API server and backend server.
GCP and AWS are used as environments, and server side development is basically Go language.
The implementation of the ad delivery tag is JavaScript, and Python is used for the management screen and the operation tool etc.
In addition, the company uses Aerospike, MySQL for DB, BigQuery for summary, and they handle data of billions of requests a month.

In particular,
The company is working on Natural Language Processing, Data analysis, Crawlers to improve the services day by day.

In the near future, the company will work on:
• Predict view-ability from page composition, placement of ads, etc.
• HT Firewall with proxy or kernel module
• Natural language processing other than Japanese

You will be expected to be a CTO in the near future (Probably in 2 ~ 3 years.)

※Please note that the position is only for those who are currently residing in Japan only
It Skills

Cloud Platforms


Framework-Back end

Ruby on Rails

Programming Languages-Data base related


Programming Languages-Others


-Must have a bachelor, master or PhD degrees related to computer science.
-Experience in back-end and server-side programming.
-Experience in developing using either Go, Scala, C/C++, Python, Ruby, or JavaScript at least 3 years.
-Experience in developing and operating, using AWS or GCP
-Experience in leading and managing a team.
-Experience or knowledge of Natural Language Processing (Doesn't have to be practical experience)
Japanese Level
  • None
-Experience in Natural Language Processing is a big plus
-Experience in front-end development
-Experience in developing iOS / Android apps.
-Experience in developing OSS in Git
Type of people (Personality)
・Those who have a strong interest in the future of the Web and the Internet
・Those who can handle PDCA cycle
Annual Expected salary (Minimum)
Annual Expected salary (Maximum)
Salary promotion
Once a year
Transporation cost coverage
  • Covered based on Company's set policy
Work hours
10:00 - 19:00
  • Yes
  • End of Year and New Year Holiday
  • Saturday
  • National Holiday
  • Sunday
  • Worker’s Accident Compensation Insurance (労災保険)
  • Health Insurance (健康保険)
  • Unemployment Insurance (雇用保険)
  • Welfare Pension Insurance (厚生年金保険)

Interested in applying and confident you meet the requirements? Help us help you - share how your experience and skills make you the best candidate for this job.