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Lunaris

Software Engineer

Salary
450万 - 800万
Location
Tokyo
Remote
On-site / hybrid
Visa
Not specified
Language
Japanese: Not Required / English: Business Level
Posted
Mar 3, 2026
Javascript
React
Typescript
AWS
Docker
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Overview

About the Position

We are looking for an engineer experienced with Elixir to join us! In this role, you’ll have an opportunity to contribute and create awesome features for several e-commerce products using Elixir with the Phoenix framework and PostgreSQL.

As a small, self-funded company with around 10 members on our engineering team, you’ll have an opportunity to really make an impact and grow as engineer. As such, we are looking for someone who has both excellent technical knowledge and skills while also taking initiative, challenging themselves by tackling complex problems with confidence and care.

Responsibilities

  • Write readable, maintainable and performant Elixir code
  • Regularly document and test modules and functions
  • Be able to work independently and see projects through from conception to completion
  • Proactively collaborate with team members to complete tasks and projects
  • Participate in code reviews and adhere to coding standards and best practices

Required Skills

  • At least 2 years of experience as a software engineer
  • Strong understanding of data structures, algorithms and system design
  • Experience with database design and writing performant SQL queries using PostgreSQL
  • Highly motivated and independent
  • Strong communication and teamwork abilities
  • Preferred Quilifications
  • Previous professional experience with Elixir and commonly used packages in its ecosystem, such as Oban, Oban Pro, Broadway, and more
  • Experience developing applications for Shopify
  • Experience building web applications with Phoenix LiveView
  • Experience with cloud service providers like AWS (preferred), Azure, GCP, etc.
  • Experience with front-end technologies such as React (preferred), Vue or Angular
  • Past experience developing mobile applications with React Native
  • A degree in computer science or other related field

Hiring Process

1

Online Interview with Founder and Senior Engineer(s) - 30min

2

We’ll discuss your engineering background and past experience, and give you a chance to learn more about our company.

3

Technical assignment

4

You’ll have a chance to show off your technical skills by completing a small assignment. You have some freedom in what language(s) and technologies you use to complete this assignment, so don’t sweat it if you’ve never used Elixir before!

5

In-person or remote interview with the team - 90-120min

6

If you’re currently based in Japan, you’ll have an opportunity to enjoy lunch or dinner (on us!) at our office in Kichijoji. If you’re based outside of Japan, we’ll have a group video call. Either way, this will be a chance to meet and talk with members from various teams at our company. After that, there will be a technical interview with our engineers where you’ll discuss your solution to the above technical assignment as well as discuss other technical topics.

About Lunaris

We are looking for an engineer experienced with Elixir to join us! In this role, you’ll have an opportunity to contribute and create awesome features for several e-commerce products using Elixir with the Phoenix framework and PostgreSQL.

As a small, self-funded company with around 10 members on our engineering team, you’ll have an opportunity to really make an impact and grow as engineer. As such, we are looking for someone who has both excellent technical knowledge and skills while also taking initiative, challenging themselves by tackling complex problems with confidence and care.

Our team loves functional programming and is always excited about the Elixir ecosystem. We’re always looking for new ways to apply the unique benefits of Elixir and its underlying Erlang VM to elegantly solve new business problems. If the above describes you, we are eager to speak with you.

Quick Facts

CompanyLunaris
LocationTokyo
Salary450万 - 800万
RemoteOn-site / hybrid
VisaNot specified
LanguageJapanese: Not Required / English: Business Level
Interested in this role?

Submit your application for this role at Lunaris.

Apply Now