株式会社primeNumberのSenior Software Engineer(TROCCO)の求人

◼︎About the Role
・Emerging Market Leader: Backed by strong adoption (2,000+ companies) and ¥3.4B in funding / Positioned to lead the data enablement market through product and tech innovation
・Deep Ownership: Involved end-to-end from value definition to architecture design — a central role in our product
・Bold Challenges: Addressing the ¥32T+ data management market and exploring business applications of generative AI

Even if you’re just curious, we’d love to hear from you. Feel free to reach out.
→ Casual Interview
https://herp.careers/v1/primenumber/g2y0kzsO6A8s

→ 10-minute Business Intro Deck
https://speakerdeck.com/pn_pr/primenumber-introduction

◼︎About primeNumber
primeNumber is a data technology company driven by the vision: "Transform all data into business power."
In today's world, where the effective use of AI is key to business success, high-quality data is essential for AI to generate accurate and reliable outputs.
As we enter an era where humans and AI coexist, primeNumber is committed to removing the barriers to data utilization and creating a world where everyone can live alongside the true value of data.

◼︎Our Services
・TROCCO: A cloud-based ETL platform that enables seamless data integration and management across various systems.
・COMETA: An AI-powered data platform designed to enhance data utilization and business decision-making through automation and intelligent insights.
・PROFESSIONAL SERVICES: A suite of expert-led solutions addressing complex challenges in the field of data technology, tailored to meet each client’s specific needs.
・primeBusinessAgent：Provision of the Agent-Based AI Solurion

Our flagship product, TROCCO, is trusted by over 2,500 companies and organizations, including CyberAgent, Recruit, Mercari, and Osaka Gas.

◼︎Why We’re Hiring
Our flagship product TROCCO has grown into critical infrastructure for modern data platforms. As we enter a more mature phase of development, we face increasingly complex architectural and user needs.

We're looking for engineers who can lead core product development — from architectural design and technology selection to driving execution in collaboration with cross-functional teams.

You’ll also help evolve the development organization itself by addressing challenges such as technical debt management, tacit knowledge codification, and continuous productivity improvement.

Additionally, we’re expanding the product for ・generative AI use cases・, ・enterprise-scale features・, and ・global markets・ — meaning your work will shape the future of TROCCO on multiple levels.

◼︎Responsibilities
You will lead product development that directly contributes to business growth, including not just implementation, but also architecture design, tech decisions, and cross-functional collaboration. You will have a key role in evolving our SaaS platforms — TROCCO and COMETA — for long-term scalability and AI-era readiness.

Key areas of focus include:
・Long-term product architecture, feature development, and performance improvements
・Technical decision-making and reviews (e.g., refactoring, resolving technical debt)
・Collaborating with PdMs, CSEs, QA, and others to execute on roadmap
・Improving team engineering processes, tooling, and knowledge sharing
・Mentoring junior engineers, pair programming, and code reviews
・Participating in company-wide projects for integrating generative AI into products

◼︎Why Join Us as a Software Engineer
・High Ownership: Lead everything from design to implementation to decision-making. Shape the technical core of the product and the team.
・Product Impact: Go beyond just building — co-define and deliver value that’s actually used by real customers.
・Build for the AI Era: Drive real-world implementations of generative AI and data productivity tools — both internally and in-product.

◼︎Reference Links (Japanese)
・Our Culture and 8 Elements
https://note.primenumber.co.jp/m/m01089dc05116?_ga=2.232109911.913922094.1751890806-1818199376.1724208067

・CTO Office Interview
https://note.com/gtnao/n/n0f61927f0924?magazine_key=mca2b9cd5c5d3&_ga=2.232109911.913922094.1751890806-1818199376.1724208067

Team Structure (Product Development HQ – ~33 FTEs, ~22 Contractors)
・1 CTO
・4 PdMs / 3 PMMs
・17 Software Engineers / 3 SREs
・2 Designers / 1 Technical Writer
・1 QA Engineer / 1 Security Engineer

Tech Stack
・Languages: Ruby (Rails), TypeScript (React), Java (Embulk)
・Infra: AWS (mainly EKS, ECS Fargate)
・IaC / Monitoring: Kustomize, Terraform / CloudWatch, New Relic, Redash, Rollbar
・CI/CD: CircleCI, GitHub Actions
・AI Tools: Claude, GitHub Copilot, Gemini
・Communication: GitHub, Slack, Google Workspace, Confluence, Miro
・Others: Okta, 1Password

■Desired Characteristics
・Resonates with our 8 Elements and vision
・Strong logical thinking and decision-making
・Willing to collaborate across PdM, Design, CS, and other teams
・Eager to lead and build impactful solutions

◼︎Required Skills
・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
・Japanese proficiency at a business level or higher

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