株式会社Micoの
TECH-Bizclo-01. Lead Full Stack Engineer (Bilingual –Japanese/English)_TokyoDevの求人

募集概要

At BizClo, you’ll have the opportunity to take ownership of and modernize the architecture of a high-traffic enterprise SaaS platform used daily by leading businesses. You’ll tackle challenges such as scaling real-time messaging systems, enhancing the developer experience, and refactoring complex features—all while helping to set engineering standards for a fast-growing product. This role isn’t just about solving technical problems; it’s also a chance to grow into a trusted technical leader, mentor others, and thrive in a bilingual, multicultural team environment. By collaborating with both Japanese- and English-speaking colleagues, you’ll expand not only your technical expertise but also your ability to lead and influence in a truly global context. ◼︎Job Summary BizClo is an enterprise-focused LINE chat SaaS platform handling a massive volume of messages and high-traffic request processing daily. The product delivers experiences that improve operational efficiency and drive sales through 1-to-1 communication. In this role, you will tackle challenges such as modernizing and refactoring increasingly complex internal and customer-facing features, improving developer experience, balancing real-time responsiveness with system stability, and paying down technical debt. ◼︎Key Responsibilities <Architecture Design> Drive system design and development with an emphasis on modularity and reusability to accommodate flexible customer requirements. Actively work on design improvements based on current architecture and challenges. <Performance & SRE> Lead continuous improvements based on various metrics to enhance service responsiveness and stability, and establish and execute operational indicators. <Design System Promotion> Manage a shared foundation that connects design and implementation while maintaining UI quality. <DevEx Improvement> Improve developer experience by shortening build times, refining review processes, and expanding automation. <Technical Leadership> Facilitate environments that support technical decision-making and actively support the growth and mentoring of junior members. <Multilingual Communication> Collaborate and document effectively with global teams using both Japanese and English. ### Language and Platform - TypeScript - Node.js / pnpm / Turborepo ### Front-end - Next.js - Chakra UI / ShadCn ### Back-end - NestJS - Prisma ORM - Kafka、Redis、Elasticsearch ### Infrastructure and Operations - AWS（S3、Cognito、SQS） - Terraform、GitHub Actions ### Monitoring and Quality Assurance - New Relic、OpenTelemetry - Jest、Playwright、ESLint、Prettier

必須スキル

- Extensive practical experience (around 5+ years) in developing medium to large-scale web applications - Experience designing, implementing, and operating UI using React + Next.js - Experience designing and operating scalable backend systems using Node.js + TypeScript - Understanding of datastore design including RDB, NoSQL, and message queues - Experience with DevOps practices utilizing CI/CD and Infrastructure as Code (IaC) - Ability to conduct technical discussions and create documentation in English

歓迎スキル

- Experience leading improvements in development infrastructure, performance, and monitoring - Experience designing and improving real-time processing for high-traffic systems - Practical experience complying with security and privacy guidelines and regulations - Track record of external contributions (OSS, conference presentations, technical blogging) - Ability to conduct technical discussions and create documentation in Japanese

求める人物像

- Ability to move forward from ambiguity and undefined situations with curiosity and drive - Balances technical decisions considering short-term effort and long-term value - Rapidly iterate on hypotheses and learn from failures - Sets high standards through code and reviews, inspiring the team - Identifies product challenges and follows through to completion - Collaborates with multinational members and openly shares knowledge

応募概要

給与: Salary will be determined based on previous experience, taking into consideration your skills and expertise.
勤務地: ▪️Work Location - Your preferred work location will be discussed. - Flexible work styles are available depending on job responsibilities (remote/on-site). ▪️Average On-Site Frequency - About 4 days per month. ▪️Osaka Office WeWork Midosuji Frontier 1-13-22 Sonezakishinchi, Kita-ku, Osaka-shi, Osaka Prefecture ▪️Tokyo Office WeWork The ARGYLE Aoyama 6F 2-14-4 Kita-Aoyama, Minato-ku, Tokyo
雇用形態: Full-time employee
勤務体系: ▪️Work Hours - Standard Schedule: 9:00 AM – 6:00 PM (includes a 1-hour break; overtime applicable). Flexible Time: Core hours from 10:00 AM to 4:00 PM. - Certain grades may fall under a discretionary labor system, per company regulations. ■Holidays and Leave - Weekends (Saturday & Sunday), national holidays - Year-end and New Year holidays - Summer vacation - Bereavement leave - Paid leave (10 days granted upon joining, with additional days based on tenure) - Other company-designated holidays
試用期間: Generally 3 months (no changes in compensation or benefits during this period).
福利厚生: - Commuting allowance (including bicycle commuting) - Company laptop provided - Company phone provided (*role-specific) - Flexible start-time policy (every two months upon request) - Social insurance (health, pension, employment, workers' compensation) - Life and health support leave - Health checkup expenses covered - Parental and childcare support programs - Club activity support