This position is closed and is no longer accepting applications.

Back-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

  • You will work on development of several e-commerce related products
  • Understand product goals and feature requests and translate them into working software
  • Develop server applications using technologies like Elixir and PostgreSQL.
  • Properly test and prepare new releases by writing automated tests, doing code reviews and helping introduce new processes that helps maintain a high quality code base.
  • Help evaluate and clarify product requirements and provide technical solutions.
  • Maintain and improve the existing products
  • Contributing to core team processes and to company-wide efforts
  • Support and debugging web applications as needed


  • Located in Tokyo
  • At least 3 years of experience as a back-end developer with at least 1 year of experience with Ruby on Rails and/or Elixir (however, most work will involve Elixir)
  • Basic understanding of front-end technologies, such as React or Vue
  • Experience working in a Scrum/Agile development team
  • Experience in software testing and test-driven development
  • Experience with relational database design and SQL.
  • Ability to take the initiative in researching new technologies
  • Experience in designing and implementing RESTful APIs/GraphQL
  • Strong sense of ownership of own work

Nice to haves

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

  • Experience in cloud technologies like AWS
  • Experience in CI, CD technique, and tools
  • Experience in setting up Linux servers
  • Experience with container, orchestration tooling such as Docker, Kubernetes.
  • Efficient at writing and profiling/analyzing SQL queries.
  • An interest in business and services

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