Money Forward

Senior Backend Engineer (Ruby on Rails)

Salary

650万 - 1100万

Location

Tokyo

Remote

On-site / hybrid

Visa

Not specified

Language

Japanese: Not Required / English: Business Level

Posted

Apr 2, 2026

Ruby

Backend

Engineering

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Overview

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.

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.

Required Skills

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

Preferred Skills

Experience in AI development and/or experience in using AI tools to improve development processes.
Money Forward recently announced our AI Strategy roadmap which focuses on improving AI-driven operational efficiencies, as well as integrating AI agents into our products to deliver better value to our users. (More information here)
Language Requirements
English: Business level (TOEIC 700+ equivalent) — Capable of participating in meetings and communicating via text/email in English.
Please consult with us if you have other qualifications or experience that demonstrate your English ability besides TOEIC.
Examples: Eiken Grade Pre-1, Eiken Grade 2 (Eiken CSE Score 1950+), TOEFL iBT 60+, IELTS 5.0+, Cambridge English Exam FCE, etc.
Other qualifications and experience demonstrating English ability are open to consultation.
Those without a qualification equivalent to TOEIC 700 or higher will be required to take a company-designated exam during the selection process (usually after the first interview).
Japanese: JLPT N5 or higher
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
Tools Used
Repository Management: GitHub
CI/CD: CircleCI, bitrise, ArgoCD, CodeBuild, GitHub Action
Development Environment: Docker, Terraform Enterprise
Monitoring: DataDog, Rollbar
Online Communication: Slack
Task Management: Jira
Work Environment
At Money Forward, we provide an environment where we can create world-class services together, and we are looking forward to welcoming you.
Provided PC Specs: We provide PCs equipped with the latest CPUs (MacOS or Windows). Custom-made PCs tailored to business requirements and replacements with the latest OS are also possible.
Systems to Enhance the Development Environment: Peripheral devices necessary for work (such as displays, mice, keyboards) can be purchased as office supplies. Generally, you can choose from standard products (catalog), and if conditions are met, you can apply for non-standard products as well.
Money Forward Library: We have a library system where you can freely borrow books, ranging from technical books to management books. Desired books can be purchased at the company's expense.
Referral Driven: We cover the cost of recruitment meals. There is a referral reward system.
Conference Participation Support: The company partially covers participation in domestic and international conferences, such as RubyKaigi and Google I/O.