This position is closed and is no longer accepting applications.

Front-End Engineer

Lunaris Musashino-shi, Tokyo
    💴 No salary range given
    🏡 Partially remote
    🧪 Minimum years of experience unspecified
    💬 No Japanese required
    🌏 Japan residents only
    🧳 No relocation support

About Lunaris

Lunaris Musashino-shi, Tokyo

We offer custom Shopify solutions to e-commerce businesses – we started out with an otaku-centric online shop (that’s now over a decade old!) so e-commerce is near and dear to our hearts.

Key benefits

  • No overtime and flexible schedule
  • Relax in our lounge
  • Complimentary weekly massage

About the position

What you’ll do

  • Develop frontend applications using modern frontend technologies like React, TypeScript and Composition API, etc.
  • Properly test and prepare new releases by writing automated tests, doing code reviews and helping introduce new processes that help maintain a high quality code base.
  • Help evaluate and clarify product requirements and provide technical solutions.
  • Working with the marketing team, product managers and designers to understand user goals, design product features and build prototypes
  • Implementing front-end facing code on our stack, mostly the typical HTML/(S)CSS, React or React Native.
  • Routinely testing web-apps for ease of use, speed and other quality factors; and develop automated testing to prevent both bugs and regressions
  • Build the libraries necessary for implementation
  • Technical design and implementation of frontend architecture and UI components

A Portrait of our Front-End Engineers

  • You are an JavaScript & CSS aficionado.
  • You don’t mind peer reviews, you love them.
  • You know when to use a dependency and when not.
  • You love JavaScript ES2018 (ES2015, at least).
  • You are comfortable working in both a team and also independently to ensure goals are achieved.
  • Quality of code is your priority and you follow best practices.
  • You have an ability to foresee where your code may need to be altered to keep in line with the company strategy.


  • Located in Tokyo
  • At least 1 year of JavaScript/TypeScript and basic backend development experience for web applications
  • Proficiency in web development, especially with HTML and CSS
  • Production experience with the latest versions of React.
  • Experience implementing designs made by designers on e.g. Figma
  • Knowledge of and passion for graphic design, typography, UX
  • Ability to integrate with APIs (e.g. GraphQL)
  • Have experience in crafting mobile-first responsive sites for a range of devices
  • Interest and ability to learn other coding languages as needed

Nice to haves

While not required, tell us if you have experience with any of the following.

  • Experience in unit/e2e testing implementation in JavaScript
  • In-depth understanding in frontend performance optimization
  • Experience with server side programming languages, include but not limited to Ruby, Elixir and NodeJs
  • A general understanding of server side rendering (e.g. using Next.js with React)
  • Experience with React Redux

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