• Excellent understanding of MVC, ORM, RESTful, OOP.

• Good knowledge and experience of Ruby, Ruby on Rails, JavaScript.

• Experienced with PostgreSQL

• Experienced with one of modern JavaScript framework:  Vue, Vue.js, React.js, AngularJS, Backbone.js

• Monitoring: Mackerel, New Relic, Datadog

• Tools: Ansible, Docker

• Experience with Ruby on Rails, along with other common libraries such as Rspec

• Good understanding of the syntax of Ruby and its nuances

• Solid understanding of object-oriented programming

• Good understanding of server-side CSS preprocessors (such as Sass, based on project requirements)

• A knack for writing clean, readable Ruby code

• Ability to integrate multiple data sources and databases into one system

• Understanding of fundamental design principles behind a scalable application

• Able to create database schemas that represent and support business processes

• Able to implement automated testing platforms and unit tests

• Proficient understanding of Git

• Familiarity with continuous integration

• Good teamwork skills.

• Good communication in English.

Nice to have

• Have experience in Kaizen methodology.

• Have the ability to handle stressful situations.

• Familiar with working in an Agile environment.

• Strong English verbal and written communication skills.

• Good presentation skills.

• Fluent Japanese is a plus.