◼︎About primeNumber We are a data technology company with the vision of "Transforming all data into business power." Data is now the driving force of business. Managing data freely is a prerequisite for corporate management and the core of success. In the modern era, where the value of data increases daily, we aim to realize our vision through a "DATA ORCHESTRATION CLOUD" initiative, encompassing various products and services. ◼︎What we provide ・Cloud ETL TROCCO® 　　・An industry-leading managed ETL and data manipulation service, bridging customer’s in-house databases plus hundreds of endpoints from Google Ads to Shopify ・Cloud data catalog COMETA® 　　・Database cataloging to promote the discovery, understanding, and utilization of data ・Professional Services 　　・Comprehensive support for designing and implementing data infrastructure, from setup to day-to-day usage Our flagship product,TROCCO®, is provided to over 2,000 companies and organizations as of February 2025, including CyberAgent, Recruit, Mercari, and Osaka Gas. We are also promoting global expansion, supporting businesses worldwide with advanced technology and unique ideas. ◼︎Targeting A Market Size of 2 Trillion Yen Aiming for the Japanese data management market, which reached 18 billion yen in 2024, and the North American data integration market, expected to exceed 2 trillion yen by 2026, we plan to increase TROCCO® adoption in the domestic market more than 500% within three years and aim to introduce it to 2,000 companies in the overseas market within five years, establishing a global de facto standard. ◼︎Why We Hire primeNumber is spinning off multiple new English-only full-stack engineering teams, running in parallel with current Japanese development. We strongly believe that global skill is necessary to produce world-class services, and importantly these English teams are not localization “side-teams” - they work along with their Japanese language counterparts to produce primeNumber’s core products. To seed these new engineering teams, we are looking for individuals who understand business and product strategies, possess technical skills, and can grow these new teams from 0 to 1 to create the future of primeNumber! ◼︎Job Description You will be a full stack engineer involved in the development of the backend and frontend of TROCCO® and COMETA®. You will lead projects in cooperation with PdM, designers, and CS, involving other development members. (Even if you do not have expertise in data engineering, you can catch up, so we welcome those who are even slightly interested to apply for a casual interview.) Development Examples: ・Developing and improving connectors ・Developing and improving over 100 types of connectors supported by TROCCO®, such as HubSpot for source transfer and BigQuery for destination transfer ・Developing workflow functions ・Developing features that import data pipeline configuration information from GitHub ・Developing functions to visualize data dependencies on BigQuery/Snowflake (data lineage) ・Developing various new features to solve data engineering challenges ・Developing the new product data catalog COMETA® ・Using latest AI technologies, like LLM models and frameworks, to help customers utilize data and make business decisions ・Helping customers by investigating and fixing various bugs ・Refactoring and significantly improving systems to achieve primeNumber’s vision As a Software Engineer at primeNumber you can experience ・Involvement in upstream requirement/specification formulation with PdM, as TROCCO®/COMETA® are rare domestically developed services with an engineer userbase. ・Involvement in UI/UX development aimed at quick, safe, long-term data utilization, considering both introduction and long-term operation. ・A team dedicated to delivering value to customers through TROCCO® and COMETA®, taking pride in the products we build. ・An engineering-first corporate culture, where those who can create value are respected and given discretion. ・Working in a high-level team environment with many veteran engineers and data experts, gaining development experience regardless of age or years of experience. Management, sales, and CS teams with abundant technical knowledge, ensuring understanding of technical investments. Since the full-scale global expansion started in 2023, you can be involved in global-standard products. Gaining broad knowledge in the "data engineering" field, expected to grow overwhelmingly in the future, and enhancing your market value. ◼︎Reference Materials (Japanese) ・primeNumber Culture Introducing our founding background and important values (8 Elements) https://note.primenumber.co.jp/m/m01089dc05116 ・Frequently Asked Questions by Engineers During Casual Interviews https://note.com/kekekenta/n/n73423afd139b ・Article on the Relationship Between Business and Product Development https://note.com/kekekenta/n/naf4d2e96b7a8?magazine ◼︎Product Development Department Structure 1 CTO / 4 PdM / 3 PMM / 16 SWEs / 2 SREs / 2 Designers / 2 Technical Writers / 1 QA / 1 Security Engineer ◼︎Technical Stack ・Programming Languages：Ruby (Rails), TypeScript (React), Java (Embulk) ・Infrastructure：AWS (mainly EKS, ECS Fargate) ・Configuration Management：Kustomize, Terraform ・Monitoring：CloudWatch, New Relic, Redash, Rollbar ・CI/CD：CircleCI, GitHub Actions ・Communication：GitHub, Google Workspace, Slack, Confluence, Miro ・Others：1Password

◼︎Required Skills ・Experience in web application development and database design/operation for services of a certain scale ・Experience in technology selection and architecture design ・Experience leading teams and driving projects ・Experience troubleshooting databases and middleware

◼︎Preferred Skills ・Development with React/TypeScript ・Development with Ruby on Rails ・Kubernetes operation ・Experience building and operating commercial services using AWS ・API integration development with external systems ・Development with Java, especially operating Embulk/Developing Embulk plugins ・Experience in designing, building, and operating mid-to-large scale services Knowledge of application security ・Japanese ability is a bonus but not essential

■Desired Characteristics ・Alignment with primeNumber’s mission and values (8 Elements) ・Logical thinking ability ・Willingness to work while communicating with a wide range of professions such as PdM, designers, and CSE ・Desire to lead a team and achieve great things