Senior Backend Engineer - Ruby on Rails

Money Forward Minato-ku, Tokyo April 3 2026
  • 💴 ¥6.4M ~ ¥11M annually
  • 🏡
    Partially remote
  • 🗾 Japan residents only
  • 💬
    Basic Japanese
    Business English
  • 🧪
    Senior level
    3+ years experience required
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About Money Forward

Money Forward Minato-ku, Tokyo

Money Forward is a fintech startup delivering tools to visualize and improve both individuals'​ and companies'​ financial health.

Key benefits

  • Small but diverse team
  • Great support for OSS
  • Relocation support

About the position

As a Backend Engineer, you will lead the development of “Money Forward Business Card” a cashless platform that promotes cashless transactions through a variety of payment methods, including card and wallet payments, and streamlines back-office operations.

As the scale of the product expands in the future, it will be necessary to provide new functions quickly to meet user needs while at the same time maintaining stable operations and high service quality.

To achieve this, not only development speed but also application design and team development methods are important.

Therefore, we are looking for someone knowledgeable and experienced in web application construction and development methods.

Technology Stack

  • Backend: Ruby on Rails, Golang, Node.js, GraphQL
  • Frontend: React, Typescript, Next.js, Redux, Apollo Client, Jest
  • iOS: Swift, SwiftUI, CoreData, Apollo, ReactorKit, Composable Architecture, Bitrise
  • Android: Java/Kotlin, Android Jetpack (Camera, DataBinding, Navigation etc.), LiveData/ViewModel, Dagger/Hilt, OkHttp3, Retrofit2, Apollo Android
  • Database:MySQL(Aurora)
  • Infra, Middleware:AWS(ALB, EC2, ECS, RDS, S3, SQS, ElastiCache, EKS等), sendgrid, kinsta, GCP (BigQuery, Firebase, GKE), nginx, squid, memcached, kafka, elasticsearch, Fluentd, envoy, Puma,Docker, Redis, Terraform

Responsibilities

  • Develop products and their functions with Ruby.
  • Understand business requirements and design high-level architecture.
  • Create system requirements that include functional and non-functional requirements.
  • Write and test codes.
  • Review codes.
  • Educate team members, like hands-on coding.
  • Collaborate with team members, Engineering Manager, Product Manager, and other stakeholders.
  • Promote globalization of the team.

Requirements

  • Computer Science / Engineering Bachelor’s degree or related technical field.
  • 3+ years of software development experience.
  • Experience with Ruby on Rails
  • Deep understanding of web service development.
  • Successful track record of developing quality software products and shipping production-ready software.
  • Experience with working in an Agile/Scrum team.
  • Team player.
  • Strong interpersonal skills.
  • Experience in AI development or development using AI tools
  • English: Business level (TOEIC 700+ equivalent) — Capable of participating in meetings and
  • Japanese: JLPT N5 or higher

Compensation

¥6,408,000 ~ ¥11,000,000 annually.

Hiring Process

  1. 1

    CV Screening

  2. 2

    First interview

    Depending on the position, there may be a technical assignment before the interview

  3. 3

    Several interviews

    The number of interviews depends on the position.

  4. 4

    Final interview

    We may ask for a reference check before or after the interview.

DO YOU NEED MORE INFO?
ASK A QUESTION

Meet Money Forward's Developers

Kostas Mavrikis left the Netherlands to join Money Forward in October 2023. As the first non-Japanese speaker in the Fukuoka office, he's been taking the initiative on Money Forward's Englishnization program, as well as introducing Kotlin, Scrumban, and European-style coffee meetings to his team.

Read their story...

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