Backend Engineer (Ruby+Go)

  • Tokyo
  • Remote OK
  • Full-time
  • January 30, 2024
7,000,000 - 8,500,000 JPY /yr
Apply from Anywhere 👍
Relocation to Japan 👍
(Overseas visa sponsorship supported)
Language Requirements
Japanese: Not Required 👍
English: Fluent
Minimum Experience
Senior or above



WealthPark is looking for a backend engineer who can accelerate architecture replacement with high ownership. WealthPark has been providing SaaS business for over 6 years. We have some core products. We are gradually changing architecture from a monolith to a microservices.
WealthPark has 2 major expectations about this position.

1) Capability to tackle and improve our existing products(Ruby).
To maintain or replace our existing products requires persevering efforts. In some cases, our documentation is not perfect, or to resolve issues, engineers need to dig into the code deeply. We are looking for a person who is willing to make an effort. WealthPark doesn’t underrate this kind of effort. Some legacy products are our business core. With those products, our business is running properly. And as a startup, it is also expected to continue to provide new value to users. From this perspective, we also need to modify and improve our existing products.

2) Continuously learn new technologies and find ways to solve issues and requirements(mainly Go).
On the other hand, WealthPark would like to migrate architecture from the existing apps into modern ones to expand our business and realize our mission. For contributing to the new architecture, WealthPark is also expecting a person who continuously learns new technologies and finds ways to solve issues and requirements. From a programming language perspective, we are planning to use Golang mainly. But WealthPark is a very flat organization and team. So you can also suggest architecture and tech stacks as you want. We think a person who can realize the above 2 expectations can accelerate replacing architecture from a monolith into a microservice basis.


What You Will Do

  • Defining, evolving, and communicating the team’s vision, mission, and strategy across WealthPark.
  • Brainstorm and do design sprint with Product Managers, Designers, Backend, and FrontEnd Engineers to build new features, and architectures.
  • Maintain and improve existing products(mainly Ruby or Node JS APIs).
  • Develop a new API with modern technology such as Go for architecture replacement.




  • Building web applications professionally for 5+ years.

Technical Skills

  • Experiences of development by Ruby or Go. 
  • Experiences in Ruby web application framework development (Sinatra or Rails) if your main strength is Ruby.
  • Knowledge of web API development.
  • Knowledge of Database design.
  • Knowledge of CI/CD tooling such as Jenkins, Github Actions, and GitLab CI/CD.
  • Motivation to learn new techniques such as Golang.


Soft Skills

  • English(80% of engineers are non-Japanese. We are a very international team.)
  • Highly organized person.
  • Have motivation for team development.
  • Empathy for Behavior Identity of WealthPark.
  • Be able to weigh several and often conflicting constraints and make decisions in a fast-moving and quickly-growing company.
  • Continuously learn new technologies and find ways to solve issues and requirements.


Nice to have

  • Experiences of development by PHP, Python, Scala, Node
  • Communication by Japanese (not required)
  • Experience working in the real estate or Fintech industry
  • Experience in Event-Driven Architecture
  • Experience with GraphQL.



2018年11月には米国へ進出し、米国の不動産テック・コミュニティとの関係強化を積極的に進めています。また、世界の不動産テック企業が集う「WealthPark NYC」では日本のスタートアップ企業で初めてオフィシャルイベントとして認定されました。不動産テックの本場ニューヨークから、グローバル市場を見据えて挑戦し続けています。

会社全体として、社員の半数以上が外国籍(12か国以上)で構成されたダイバシティ豊かなチームです。現在社内公用語は日本語ですが、英語対応を進めており、国籍に関係なく優秀な人材が活躍できる環境を積極的に構築しています。 また、エンジニアリング部門は多国籍人材が9割以上というグローバルな環境で、日本語を不問としており、英語環境です。


View WealthPark's company page

Search jobs from WealthPark in Japan
Backend Engineer (Ruby+Go) at WealthPark