Fullstack Developer

Overview

At MFBC (Money Forward Business Company), we primarily develop and offer the B2B service Money Forward Cloud is a component-based cloud ERP that allows users to choose combinations based on their needs and is composed of multiple service groups. However, if these service groups are developed individually, it can lead to data silos, a decline in user experience, and reduced development efficiency. Therefore, it is necessary to strategically standardize these services. Our Business Platform Development department is responsible for building this common foundation and promoting its stable use across services.

We are currently seeking a Senior Backend Engineer for the Workflow Platform Development department, which provides workflow functions used by various services within the business platform. The expectations for workflows vary depending on the matters and culture handled by each user company, and we aim to meet these expectations as much as possible. At the same time, as the system becomes more complex with enhanced functionality, it is essential for medium- to long-term growth to organize the system logic and improve maintainability. Furthermore, by optimizing data management and architecture, we aim to ensure system reliability and scalability, balance these aspects, create a truly user-focused optimal workflow system, and maximize the workflow experience of the Money Forward Cloud series.

This position will play a crucial role in creating the developer experience and reliability of the common platform service. Additionally, depending on personal preferences, there is an environment where one can actively take on roles beyond backend development, such as SRE and DevOps.

Responsibilities and Duties

On the MFBC-Business Platform Development Department - Workflow Platform Development Division, you will be responsible for the following duties:

• Backend development of the common workflow system

• Support for product integration of the common workflow system

• Collaborate with PdM and designers to consider development content and clarify functional constraints to reflect in UX

• Requirements definition and design (Design Doc, ADR, etc.)

• Quality assurance and improvement

• Respond to incidents

• In the future, you may be entrusted with roles such as tech lead or group leader

Expected Role

• As a professional in backend development, pursue the balance between user experience and system ease of use without being confined to the backend domain.

• Promote projects and provide appropriate support for products that integrate the workflow system.

• Plan and implement measures to advance workflow system development and quality maintenance and improvement.

• Solve technical issues related to feature development.

• Identify and improve technical debt.

• Support the skill development of team members and enhance the overall technical capability of the team by sharing technical knowledge and best practices.

Experience Gained

• You will have a broad understanding of the business areas covered by Money Forward Cloud as you will be involved across various services (such as HR management and expense reimbursement) without being confined to individual services.

• You can directly enhance the productivity of all business people by streamlining workflows.

• Experience in development with a global team (collaboration with the Vietnam development base)

• As a relatively new department and service, it is easy to continuously incorporate the latest initiatives within the Money Forward Group.

• Opportunities to demonstrate technical challenges and leadership by being involved in the development of foundational services that will support Money Forward for the next 10 years.

Required Skills and Experience

• Over 3 years of experience in backend development of web applications

• Experience in designing, implementing, and troubleshooting asynchronous messaging using tools like Kafka, Amazon SQS, or IBM MQ

• Experience in maintaining and improving systems/services for over a year, having been actively involved in new development or large-scale feature modifications

• Experience in making responsible decisions and implementing them regarding technology selection and design policies

• Ability to create conceptual models from requirements and demands and translate them into database design

• Experience in organizing situations and finding practical solutions to advance development by involving both internal and external teams, even with specifications and technical constraints

• Experience in implementing and operating various automated tests, such as unit tests, integration tests, and E2E tests

• Experience in continuously ensuring and improving code quality through code reviews

Preferred Skills and Experience

• Experience in solving technical issues by leveraging a deep understanding of Kotlin, JVM, Spring, etc.

• Basic knowledge and practical experience with HTTP/browser

• Experience in designing, developing, and operating microservice architecture

• Experience in system architecture design

• Experience in progressing development while collaborating with multiple functions (PdM, QA, designers, etc.)

• Experience in designing RDB tables and being responsible for schema implementation, operation, and maintenance in real services

• Experience in design, implementation, and consensus building starting from OpenAPI or GraphQL schemas

• Experience in system operation, monitoring, and incident response

• Experience in managing progress, issues, risks, and requirements

• Experience in appropriately explaining and reporting incidents or significant technical events to stakeholders outside of development

• Experience working overseas or collaborating with multinational engineers

• 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

• Business level English proficiency

• IELTS Overall 6+, TOEFL iBT 60+, TOEIC 740+

• Conversational level Japanese proficiency (equivalent to JLPT N3~N2 or higher)

Who We’re Looking For

• Someone who can balance 'delivering quickly' and 'maintaining sustainably' in technical decisions

• Someone who understands design and operational considerations in layers other than backend, such as frontend, mobile, and infrastructure, and has the foundation to collaborate with other areas

• Someone who empathizes with and wants to practice a culture of structurally verbalizing and documenting technology, such as runbooks and design policies

Technology Stack

Backend Domain

• Language: Kotlin

• Framework: Spring Boot, GraphQL Kotlin

• ORM: jOOQ, R2DBC

• Testing: Kotest, MockK

• Others: Debezium, Protocol Buffers

Others

• Frontend: TypeScript, React, Redux, React Flow

• Database: Aurora MySQL

• Middleware: Docker, Kafka

• Platform: AWS

Tools Used

• Repository Management: GitHub

• CI/CD: CircleCI, GitHub Actions

• Development Environment: Docker, Terraform Enterprise

• Monitoring: Datadog, Rollbar

• Communication: Slack

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.