Backend Engineer, Money Forward Kessai Ltd., Fukuoka

Overview

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

As the product scales, we must quickly deliver new functions to meet user needs while maintaining stable operations and high service quality. We are looking for an engineer with deep expertise in web application construction and modern development methods who values both development speed and high-quality application design.

Responsibilities and Duties

• Develop products and features primarily using Ruby on Rails.
• Understand business requirements and design high-level architecture.
• Create system requirements encompassing both functional and non-functional requirements.
• Write, test, and review high-quality code.
• Mentor and educate team members through hands-on coding and guidance.
• Collaborate with Engineering Managers, Product Managers, and other stakeholders.
• Actively promote the globalization of the team.

Required Skills and Experience

• Bachelor’s degree in Computer Science, Engineering, or a related technical field.
• 3+ years of professional software development experience.
• Hands-on experience with Ruby on Rails.
• Deep understanding of web service development and microservices.
• Successful track record of shipping production-ready, quality software.
• Experience working in an Agile/Scrum environment.
• Strong interpersonal skills and a collaborative "team player" mindset.
• Experience in AI development or utilizing AI productivity tools.

Preferred Skills and Experience

• Experience using AI tools to improve development processes (e.g., AI coding assistants).
• Interest in Money Forward's AI Strategy roadmap, which focuses on AI-driven operational efficiencies and integrating AI agents into our products.

Language Requirements

• English: Business level— Capable of participating in meetings and communicating via text/email in English. (TOEIC 700+ equivalent /e.g. equivalent qualifications like IELTS 5.0+, TOEFL iBT 60+, etc.).
  • Note: Candidates without a valid certificate may be required to take a company-designated exam during the selection process.
• Japanese: Conversational level (JLPT N2 or higher).

Technology Stack & Tools

• Backend: Ruby on Rails, Golang, Node.js, GraphQL, MySQL (Aurora)
• Frontend: React, TypeScript, Next.js
• Infrastructure: AWS (ECS, EKS, RDS, S3, SQS, Terraform), GCP (BigQuery, Firebase), Docker, Kafka
• CI/CD & Monitoring: GitHub Actions, CircleCI, ArgoCD, Datadog, Rollbar
• Productivity: GitHub, Jira, Slack, Notion

Work Environment

At Money Forward, we provide an environment where we can create world-class services together:

• Provided PC Specs: High-spec PCs (MacOS/Windows) with customization options for specific business needs.
• Equipment Support: Peripherals (displays, keyboards, etc.) can be purchased as office supplies.
• Money Forward Library: A system to borrow or purchase technical and management books at the company's expense.
• Referral Program: Coverage for recruitment meals and a referral reward system.
• Conference Support: Partial coverage for domestic and international conferences (e.g., RubyKaigi, Google I/O).