Development Organization Launch Phase: Tech Lead Wanted to actively participate in culture formationTranslated from Japanese

Development Organization Launch Phase: Tech Lead Wanted to actively participate in culture formation ▼Job Description ■About Marui Group Marui Group aims to realize an economy driven by "likes" by 2031. The "likes" we support are irreplaceable passions and interests for each individual, such as pets, mountaineering, sports, food culture, art, Japanese culture, and 'oshi-katsu' (supporting a favorite idol or character). By combining the strengths and assets of Marui Group, such as cards, events, and merchandise, and through real-world touchpoints and co-creation with customers, we are expanding experiences like "I use it because I like it," "I participate because I like it," and "I connect because I like it." We aim to create a world where the diverse "likes" of people and society generate new value and economy. ■About Marui Unite Marui Unite is Marui Group's tech company, established in September 2024. As an organization that creates unique customer experiences by fusing real and digital, it was established to consolidate decision-making authority for budgets, approvals, and schedules related to Marui Group's app and web development, and to promote co-creation agile development across departments and organizations. A stable financial foundation coexists with startup-like speed and freedom, providing an environment where technology can continue to drive business. Furthermore, to balance development speed and quality, we are standardizing the introduction of AI-driven development. Even in systems requiring high reliability, such as credit cards, we practice AI coding while ensuring reproducibility and safety through development phase separation. AI coding is practiced while ensuring reproducibility and safety through development phase separation. 【Reference Materials】 2026.2.20_Developers Summit 2026_Presentation Materials: https://speakerdeck.com/0101unite/2026-dot-2-20-developers-summit-2026-deng-tan-zi-liao Marui Unite Note: https://note.com/marui_unite/ ■Background of Recruitment Our mission is to create new experiences by combining digital with our customers' "likes" through the "Epos App" and "Epos Net." However, the underlying system has been operated for many years since its release in 2006, with repeated additions and modifications, leading to reduced ease of change. To create new experiences, a loosely coupled system that enables speedy and flexible service development is necessary, and there is a significant gap with the current system. Therefore, we are seeking a Tech Lead who can drive technology selection and architecture design for microservices, moving away from the monolithic system configuration. ◾️Job Responsibilities - Migration and redesign from existing Java-based systems to a microservices architecture - New backend feature development and API design/implementation for toC Fintech services - Technical investigation, specification organization, and coordination with internal/external stakeholders based on understanding of existing system design - Migration to a cloud-native environment, and infrastructure development/operational improvements to enhance development efficiency - And more ■Development Project Examples - Designing a new architecture to decouple monolithic systems and creating migration strategies - Separating the frontend and backend of Epos Net and establishing a system for efficient static content development - API development for new features and functional improvements of the Epos App - And more ▼Required Skills/Experience - Backend development experience - Development experience in statically typed languages (Java / Kotlin, etc.) - Experience in designing and developing new features ▼Preferred Skills/Experience - System tuning including performance optimization, ability to identify and resolve bottlenecks - Web system development and design experience in the financial/FinTech domain - Understanding and knowledge of ID management, authentication protocols, security, and privacy technologies - Deep knowledge and experience in Server-side Kotlin, Go, React, JavaScript (Node.js), and other backend development languages and frameworks - Experience in mentoring and training junior engineers ▼Ideal Candidate Profile - Someone who finds challenges and difficulties interesting and immerses themselves in solving them - Someone who can contribute to the team's value enhancement and results, not just individual skill growth and achievements - Someone who continuously learns technical knowledge and improves their skills and technical capabilities - Someone who can consider correct prioritization and technology selection from the perspective of business value and customer value, not just technical challenges and problem-solving - Someone who resonates with the initiatives of Marui Unite and Marui Group and wants to continue innovating by leveraging databases ▼Job Highlights ■Development Organization Launch Phase This is a newly established company in September 2024. Therefore, you can be involved in the launch of the organization and have abundant opportunities to play an active role depending on your initiative. Although it is a newly established company, team members are expected to drive Marui Group's business and products together, making it a rewarding environment. ■Environment to Practice AI-Driven Development We are fully promoting AI coding. With a policy of selecting and using the best tools on the market, individuals can select and apply for AI tools at their discretion. We hold bi-weekly knowledge-sharing sessions on AI coding and AI agents with all engineers, fostering collective growth in AI utilization expertise. Our philosophy is not "be cautious because it's an important system," but "achieve both quality and speed with AI precisely because it's an important system." This allows for advanced AI utilization even in the financial industry, which demands high security and reliability. ■Experienced Members to Work With CTO: Sugomori Co-founder and engineer/designer at GunoSy and READYFOR during university. Subsequently engaged in digital creative work and software development at a major corporation, and co-founded a startup for a medical app. Led technical strategy as CTO, and after exit, served as an external board member and technical advisor. Has been responsible for architecture and engineering since the establishment of Marui Unite. Books: "Detailed Explanation of Deep Learning," "Official Textbook for Deep Learning General Examination," etc. ▼Development Environment - Languages: Swift, Kotlin, Java, JavaScript, TypeScript - Infrastructure/Middleware: AWS, Lambda(Node.js), Amazon Aurora PostgreSQL, BigQuery - Development Tools: GitHub, Slack, Looker, Notion, Jira, Figma ▼Employment Type Full-time employee (No fixed term) ▼Probationary Period 3-month probationary period applies ▼Salary Annual salary: ¥8,000,000 - ¥16,000,000 ▼Annual Salary Lower Limit (in 10,000 JPY) 800 ▼Annual Salary Upper Limit (in 10,000 JPY) 1600 ▼Work Location Marui Group Headquarters 13F, 4-3-2 Nakano, Nakano-ku, Tokyo ▼Working Hours Flextime system (within the hours of 8:00 - 22:00) *Standard working hours: 8 hours/day *No core hours *Remote work is also possible ▼Break Time 60 minutes ▼Overtime Work No track record as it is a new company ▼Holidays, Paid Leave, Special Leave - Two days off per week (Saturday/Sunday), approximately 128 days per year *10 days of paid leave granted from the start date of employment *12 days of annual paid leave granted per half-year (24 days per year) - Other: Bereavement leave, leave for childcare, family care leave, partner's birth leave, etc. ▼Benefits - Marriage leave, pre/postnatal leave, childcare leave, family care leave, reduced working hours system, employee purchase discount system, re-employment system until retirement - PC provided upon joining (Mac) - Side jobs are permitted upon application - Transportation expenses covered, etc. *New benefits will be introduced sequentially ▼Insurance Enrollment Social insurance complete (Health insurance, Pension insurance, Employment insurance, Workers' accident insurance) ▼Measures to Prevent Passive Smoking at the Workplace No smoking indoors ▼Interview/Selection Process Casual meeting -> Document screening -> Interviews (2-3 times/including reference check) -> Offer *Selection process may change ▼Other - Recruitment Site https://marui-unite.co.jp/career - Company Introduction Materials https://speakerdeck.com/0101unite/marui-unitehui-she-shao-jie-zi-liao - Note https://note.com/marui_unite/