Senior Software Engineer(TROCCO)English summary from Japanese

株式会社primeNumber

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Salary

[Annual Salary] ¥8,000,000～¥15,000,000 [Monthly Salary] ¥666,667～¥1,250,000 / Basic Salary ¥492,667～¥925,000, includes fixed overtime allowance (45 hours) ¥174,000～¥325,000

Location

Work Location (Upon Hire) 141-0021 5F, JR Tokyu Meguro Building, 3-1-1 Kami-Osaki, Shinagawa-ku, Tokyo Principally non-smoking indoors. No work in areas where smoking is permitted. Includes locations such as the worker’s home for telework. (Range of Change) Designated by the company, including locations for telework

Job Type

Full-time

Work Style

・Location: Tokyo HQ or remote (domestic full-remote also possible) ・Hours: Flex time (Core: 11:00–16:00), 1-hour break ・Remote Work: Available Wednesdays and Thursdays by default ・Holidays: Full 2-day weekends, national holidays, year-end/New Year (12/29–1/4), paid leave (15 days/year), bereavement leave ・Annual Holidays: 120+ days

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Role summaryEnglish summary from Japanese

English summary for screening — check the original posting before applying.

primeNumber is hiring a Senior Software Engineer for their TROCCO product, a cloud-based ETL platform. You will lead core product development, from architectural design to execution, and contribute to evolving the SaaS platform for scalability and AI-era readiness.

Must-haves

Experience building and operating web applications and databases at scale
Architecture design and technology selection experience
Project leadership and team collaboration
Troubleshooting skills for DBs and middleware
Business-level Japanese proficiency

Nice-to-haves

Experience with React / TypeScript
Kubernetes operations
Building/operating commercial services on AWS
API integrations with external systems
Embulk operation or plugin development
Mid-to-large scale product design and operations
Security best practices for web applications

Tech stack

Ruby (Rails)

About the Company