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Job Description

As a Frontend Engineer at Reactive, you will create beautiful and responsive web and mobile applications which connect the company’s machine intelligence platform and AI solutions to the world.

What We Use

  • React with Redux
  • Latest ES2015/JSX and CSS3/HTML5 features
  • Latest build tools like webpack, babel and gulp with node.js
  • Testing frameworks like Mocha, Karma, Jest, etc
  • Google Material Design and Apple design guidelines
  • Native development, especially using React Native


  • Bachelor’s degree in Software Engineering, Computer Science, or related technical field; or equivalent practical experience
  • Demonstrated coding, engineering, and documentation abilities
  • Thorough understanding of performance debugging and benchmarking
  • Ability to write high-performance, reusable code for UI components
  • Familiarity with some of the software and technology we use (see above) or similar (notably HTML5, CSS3, Modern ECMAscript – ES2015 or later)
  • Conversational English proficiency

Preferred Qualifications

  • Master’s degree in Software Engineering, Computer Science or related technical field
  • Development experience in React / Redux
  • Experience with native development (Swift, Objective-C, Java)
  • Contribution to open-source libraries
  • Japanese language ability (native or conversational)

About Reactive

Reactive is a rapidly growing AI startup in Tokyo, building on recent advances in deep learning and cognitive computing paradigms to create adaptable, interactive, and contextual intelligence on complex data and processes. As an applied AI company, we need both strong research staff and skilled developers.
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