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Senior Full Stack Engineer (BE Focus)

Soundraw Tokyo | Remote

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EN: none
JP: business
10 to 16 million JPY annually
Employment Type
Full time

Job Description 

We are looking for a full stack software engineer to deal with all the technical aspects of our product development. You will be entrusted with both our back-end and front-end.

We’re hiring because our growth is accelerating, and in order to keep up with it, we need to strengthen our infrastructure, optimize our systems, improve security and reliability all while adding new features.

Additionally, we will soon start the development of a new product offering specific to music artists, which will require a dedicated engineer working full time on it.


  • Work with team members on each project, from system design to project management, development, and communication with stakeholders, sometimes taking the lead.
  • Discuss with other engineers the suitability of technical choices and contribute to the correct technical growth of the organization and individuals
  • Make architectural choices to guarantee the long term proper functioning of our system
  • Solidify the framework of a rapidly growing system and contribute to the growth of the engineering team through hiring, etc.
  • Define specifications: collaborate with PdM and designers, participate to user interviews, etc


  • Significant experience as a Backend engineer, some with Ruby on Rails
  • Solid knowledge and experience with Frontend development using a library such as React, Vue, or Angular
  • Strong knowledge of Git/Github
  • Experience in working in a Scrum environment and Project Management. We currently use Pivotal Tracker for task management.
  • Experience with PostgreSQL databases, solid knowledge about schema design
  • Solid knowledge and experience with AWS infrastructure
  • Team player, open-minded, flexible to work with new technologies and change work habits, always looking to improving your hard and soft skills

Nice to Haves

These aren’t required, but be sure to mention them in your application if you have them.

  • Experience in an early stage start-up
  • Knowledge of music theory, playing an instrument
  • Japanese language

Tech/Culture Support

  • Tech is selected by discussing with engineers
  • We actively adopt new tech
  • We actively work on technical debt

Tech Stack

  • Backend: Ruby on Rails
  • Frontend: Javascript, Vue.js. It may be replaced by TypeScript and React.
  • Machine learning: Python
  • Database: PostgreSQL, MongoDB (might be dropped soon), Redis
  • Test: Jest, RSpec
  • Infrastructure: Heroku, AWS
  • Monitoring: Papertrail, BugSnag
  • CI/CD: CircleCI
  • Source code management: GitHub
  • Ticket management: Pivotal Tracker

About the Company

Soundraw is an AI music composition tool for creators. Choose the type of music you want - genre, instruments, mood, length, etc - and our AI will generate beautiful royalty-free songs for you in seconds. You can then customize the song further to match your content: add a crescendo here, leave only the drums there.