Web Application Engineer

■ Job Description ■ Summary The company develops and provides an integrated management platform, aiming to build an environment where everyone can run a business freely and naturally. The company believes that small businesses—capable of boldly and rapidly turning ideas into reality—serve as the catalyst for unprecedentedly diverse values, lifestyles, and new innovations. The organization develops its products with the vision of making entrepreneurship and business growth more appealing and accessible, ensuring that everyone involved in small businesses and sole proprietors can manage their operations authentically and confidently. Japan’s labor productivity is reported to be the lowest among the G7 nations. This stems from the fact that while small and medium-sized enterprises (SMEs) make up 99% of all domestic companies, their productivity remains less than half that of large corporations. To transform the labor productivity of these SMEs, the company is driving development that goes beyond simply digitizing and automating everyday workflows like accounting and HR/labor management. By establishing API integrations with government bodies and financial institutions, it enables offer-type financing based on AI-driven credit scoring. Furthermore, the company is building systems that seamlessly facilitate the acquisition of new business partners and transactions entirely online. By leveraging real-time business performance data and inter-company network insights—which are far richer than what traditional banks can access—alongside machine learning data generated directly from daily operations, the company is positioned to roll out services that stay two to three steps ahead of the market. You will have the opportunity to join the company in driving this impactful development. ■ Responsibilities Planning, designing, implementing, testing, measuring, and continuously improving products. Conducting R&D and investigations into new and core technical domains. Engaging in a wide variety of upcoming initiatives and ideas, including the planning and development of new features, optimization of automation algorithms, UX enhancements, and the architectural design of entirely new products. ■ Development Characteristics Cross-Functional Team Development × Pursuing Product-First Mindset ("Maji-Kachi" / Real Value) Engineers, PMs, and UX designers form product-specific teams to independently handle everything from planning to development and release, executing ideas while directly utilizing feedback from the business side. Because PMs and UX designers fully understand the trade-offs between quality and man-hours, achieving a team consensus allows engineers to build products with uncompromising attention to detail. In addition to developing new products, the candidate will be involved through the growth phase rather than stopping at the initial release. Since engineers hold the discretion over growth-related development, they can budget their own man-hours to drive these optimizations forward. Work × Family = Achieving Perfect Balance Starting with executive leadership like the CEO and CTO, many male managers actively take childcare leave, fostering an environment that deeply values both family and work. Consequently, the company offers flexible support—including adjustable working hours and remote work—to seamlessly accommodate sudden family needs, such as a child falling ill. The culture beautifully balances career and home life, as shown by the many families who join the annual Family Day and children who occasionally drop by the office on weekdays. ■ Development Framework & Perks The company has introduced a variety of unique internal systems and cultures. Below are a few examples: ・The "Kyosho" (Master) System: An engineer selected by internal voting is given a dedicated month to pause their regular operational work, committing fully to proposing and delivering massive, high-impact improvements to the company’s products or infrastructure. ・Engineering Committees: Voluntary cross-company groups like the Front-end Committee or Development Productivity Committee are established, allowing any engineer to freely join and participate. ・Dedicated Quality Improvement: Development schedules explicitly budget and secure man-hours dedicated entirely to product quality optimization. ・Internal Job-Posting & Voluntary Transfer System: Every six months, employees can apply to transfer to different teams, allowing them to master new technical domains and expand their skills. ・Annual Development Offsite: The engineering team stays at a hot spring resort every year to focus entirely on personal development goals. ・Hardware Preferences: MacBooks are provided with a choice of keyboard layouts (JIS/US layout). ・Open Repository Policy: Engineers can commit to any internal repository—there are no restrictive rules as long as the code receives a review and an LGTM (Looks Good To Me). ・Team-Centric Engineering Processes: Workflow processes are entirely defined by individual teams. While Agile development is the mainstream standard, teams are empowered to freely choose Scrum, Kanban, or XP. ・Skill-Based Functionality, Feature-Based Delivery: Engineering managers (EM), product managers (PM), QA, and UX groups are structured by specialization (skill-cut), while actual operations and projects are executed on a feature-by-feature basis (feature-cut). ・Premium Office Ergonomics: For days spent in the office, the company provides Herman Miller ergonomic chairs and high-resolution 4K external monitors. ■ Main Tools Used for Development Web Backend: Ruby on Rails, Go + gRPC, Node.js Web Frontend: React, Redux, TypeScript, webpack, styled-components, Storybook Databases: MySQL, Aurora, Redis Infrastructure: AWS (EKS, ELB, EC2, RDS, S3, SQS, ElastiCache, Redshift, ...), Kubernetes, Docker, Jenkins, CircleCI, ArgoCD, Fluentd, Ansible, HashiCorp tools, Elasticsearch + Kibana, Google BigQuery, Embulk Mobile: Swift, Kotlin, Objective-C, Java, Firebase (Analytics, Notifications, Remote Config), Bitrise, fastlane, RxSwift, RxJava Desktop Clients: Xamarin, WPF Business Platforms: Salesforce/Apex/Visualforce, Marketo, Pardot AI Lab: Python 3, Flask, TensorFlow, Keras, scikit-learn Other: GitHub, Kibela, JIRA, Slack, Confluence Working Hours Discretionary Work System Job Requirements 【MUST】 Practical experience in web application development (5 years or more) Understanding of the company’s system architecture and challenges 【The company welcomes candidates who resonate with any of the following】 A desire to significantly accelerate their growth trajectory as an engineer A passion for staying involved from planning through to operations, building products with a user-first mindset A drive to build high-value products and deliver them to customers at maximum speed A natural instinct to automate all tedious and repetitive tasks away A tendency to frequently question legacy systems and the established way things are done in the world A constant urge to challenge themselves with new initiatives and technologies A genuine interest in corporate management and business infrastructure 【WANT】 Experience designing, developing, and operating a service from scratch Experience dealing with technical debt and major changes to existing services Proactive approach to providing feedback and a willingness to take it seriously English Level Business Conversation Level (TOEIC 735-860) Japanese Level Business Level(JLPT Level 2 or N2) Chinese Level None Other Salary Description 【Holidays】 Saturdays, Sundays, national holidays, year-end and New Year holidays, paid vacations (granted upon hire), sick leave (paid/6 days per year) 【Welfare】 Insurance: Employment insurance, workers' accident compensation insurance, employee pension, health insurance Commuting Allowance Training/Self Development Allowance Holidays Saturday/Sunday/National Holiday Annual Paid Leave New Year Holiday Parental Leave Nursing Care Leave Special Paid Leave Job Contract Period FULLTIME