Senior Backend Engineer (ID infrastructure)

  • Tokyo
  • Partial Remote
  • Full-time
  • March 6, 2024
6,000,000 - 10,000,000 JPY /yr
Apply from Anywhere 👍
Relocation to Japan 👍
(Overseas visa sponsorship supported)
Language Requirements
Japanese: Conversational
English: Business Level
Minimum Experience
Mid-level or above


Money Forward aims to move people’s lives forward by offering various SaaS applications for Back-office operations and eliminating non-essential work from complex daily tasks, and radically changing the quality of and time spent on work.

In the Money Forward business company for which we are currently recruiting, we operate the Money Forward Cloud,  a SaaS offering for corporate back-office operations, which constitutes over 60% of the Money Forward Group's revenue. Through the integration of various back-office data and automation of tasks, we streamline and optimize the complexities of financial, accounting, and human resources operations. We currently offer more than 20 services as part of our portfolio.


Why we are looking for Senior Backend Engineer(ID infrastructure)?

At Money Forward Cloud, which currently operates over 20 services, we are seeking individuals who can lead in addressing the growing non-functional requirements for business common infrastructure and microservices.



We are looking for a Development Engineer for the 'Business Operator & User Management Service (Management Console)' – a critical infrastructure service that forms the core of 'Money Forward Cloud.' The Management Console serves as a fundamental service utilized by all B2B services, and it is committed to the mission of providing 'efficient, secure, and reassuring business operator & user management functionality.' This service offers features for user management among clients using the Money Forward Cloud series, closely integrating with the company-wide ID infrastructure. Additionally, it provides enterprise-level ID capabilities such as SAML authentication SSO and SCIM.


Current Challenges and Future Initiatives

Money Forward has been providing value to numerous small and medium-sized enterprises through accountants and tax professionals. In the future, to further expand our reach and provide our value to a broader user base, we require feature development targeting mid-sized and large enterprises. For large-scale businesses, the efficient execution of user management tasks and the assurance of high security are fundamental prerequisites for using our services.

Looking at it from a different perspective, breaking down the business operator and user management functions from a massive monolithic application into microservices is also a significant mission for the ID Infrastructure Group.

The primary data handled by the Management Console is stored in a growing common database alongside Money Forward's growth. While some data has already been moved to a dedicated database for the Management Console, a significant portion has not. Completing the microservices decomposition and aiming for substantial improvements in both performance and maintainability is our goal.

  • Reference stop of the common database
    • Our product not only accesses our own database but also references the shared database utilized across the entire organization. Discontinuing this reference is expected to enhance performance and availability. Various considerations, such as seamless data migration and transitioning the referenced database without interruption, need to be addressed to ensure consistency.
  • Improvement of scalability
    • Our product exposes internal APIs that are accessed by over 20 Money Forward cloud products. The number of calling products and user counts is expected to continue increasing. In such circumstances, it is imperative to design and continually enhance an architecture that can scale seamlessly.
  • The development of GraphQL APIs in conjunction with frontend separation
    • Our product's frontend was originally built with Rails. Currently, we are gradually transitioning the frontend to Next.js. We have adopted GraphQL as the API protocol for the backend. To continually meet user needs, it's imperative to design a resilient API that can accommodate changes.


The Attractiveness of the Position

  • With API access from over 20 'Money Forward Cloud' services (with over 200,000 paying users), there is a need to maintain high levels of availability and performance. Given the expected rapid increase in request volume in the future, there are challenges such as scaling out, load balancing, and performance optimization.
  • This service is essential not only for end-users but also for the in-house sales and success roles that manage sales. It's a position that can contribute to streamlining internal processes.
  • Every six months, we run the open application system 'MF Challenge System' for internal transfers. It allows applications across departments and positions, providing an opportunity to challenge a new career with a sense similar to internal job transitions.


Technology Stack

  • Serverside: Java, Go, Ruby, Kotlin
  • Frontend: MySQL(Aurora)
  • Database: MySQL
  • Infrastructure・Middleware: Kubernetes, AWS(ALB, EC2, RDS, S3, SQS, ElastiCache, EKS...),GCP(BigQuery),nginx,  logstash, elasticsearch,Fluentd, Envoy, HAProxy, Docker, Redis



Must to have

  • 3 or more years of experience in designing, developing, and operating medium to large-scale web applications (Experience with Ruby on Rails is desirable, but experience with development in PHP, Java, Go, or a willingness to catch up is also acceptable).
  • 1 or more years of experience leading a team in development, operation, and management.
  • Experience in development using container technologies such as Docker and Kubernetes.
    Development experience using cloud platforms like AWS and GCP.
    A strong desire to address real-world challenges using the power of technology.
  • Language Requirement
    • English: Fluent in both written and spoken
    • Japanese: Conversational Level


Nice to have

  • Experience in designing and developing Web APIs.
  • Experience in designing and developing microservices.
  • Experience in the logical design and operation of relational databases (RDB).
  • Experience in large-scale architecture and refactoring projects.



  • Min 6,000,000 - Max 10,000,000 Japanese yen / year (Gross) 



  • Location: Tokyo, Japan.
  • Remote work: Hybrid/Partial remote with two day of in-office work per week.


Working hours

  • Flexible Working Hours (No core time)



  • Two days off per week (Saturday and Sunday)
  • Japanese national holidays (16 national holidays in 2023)
  • Paid holidays: 10 days (first year) *Number of paid holidays increases (+1 day) each year up to 20 days per year.
  • Summer vacation days: 3 days
  • Winter vacation days: 2 days



  • Medical insurance
  • Employee stock ownership plan
  • Full transportation coverage
  • The latest computer (Unlimited upgrade or purchase when needed for development is available upon approval.)
  • Seminar participation support
  • Book purchases
  • Copyright of OSS belongs to individuals


Relocation Support for Overseas Candidates

  • Communication Support
    • Japanese language study support
      • Online beginner courses
      • Terakoya (Japanese study buddy program)
    • In-house Translation & Interpretation team
    • Active English-speaking employee community within the company
    • Culture and Language exchange events
  • Relocation Support
    • Working and dependent visa sponsorship and application assistance
    • Flight tickets (for employee and their dependent family)
    • Airport pick-up
    • Temporary fully furnished apartment
      • 1st month: free
      • 2nd and 3rd month - corporate discount available upon request
    • Relocation bonus for initial life setup
    • Settling-in support after arrival in Japan
      • City office and bank account opening tour
      • Information sharing about mobile plans, credit card applications, etc..

Money Forward, founded in 2012, strives to deliver exceptional value to users in various business domains. As a leading FinTech company, we offer over 40 services, ranging from personal finance management to B2B SaaS products.

We have been growing rapidly, and we are expanding our global hiring to help further expand the company. That means that we are open to hiring those with limited or no Japanese language proficiency.

Money Forward is one of Japan's hottest FinTech companies and it is now a great opportunity to be a part of one of our continued growths!

View Money Forward's company page

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Senior Backend Engineer (ID infrastructure) at Money Forward