Analyze JMDC and Omron Group data to develop new data-driven services, build predictive models, advise industry clients, improve services with machine learning, and publish findings.
About this role
The Backend Engineer will design, develop, and operate the backend for Pep Up, a personal health record service that integrates and manages health data. Responsibilities include developing new features, improving existing functions, modernizing the development environment, strengthening monitoring, and promoting test automation.
The role includes building API infrastructure for frontend and mobile applications and constructing and operating ETL data-processing infrastructure linked with a data warehouse. The service handles tens of millions to hundreds of millions of records, including medical data, and involves designing and operating highly reliable systems, high-traffic API infrastructure, asynchronous batch-processing infrastructure, and data lake or data warehouse integrations.
Required qualifications include at least three years of web development experience using a framework such as Ruby on Rails, knowledge of software testing and implementation experience, and experience designing and developing systems with performance and scalability in mind. Experience developing and operating large-scale web services, leading agile development, or working with microservices or large-scale data processing such as BigQuery or Glue is welcomed.
The named technology stack includes Ruby on Rails, GraphQL Ruby, RSpec, React, TypeScript, React Native, AWS, Docker, Terraform, GitHub Actions, PostgreSQL, Valkey, Datadog, and BugSnag. The development process uses agile Scrum, GitHub Flow, code reviews, GitHub, CircleCI, and Slack.
The role is based in Tokyo, with remote work generally available and two office days per week in principle. Working hours use a flextime system with core hours from 11:00 to 15:00; standard working time is eight hours per day with a 60-minute break. Benefits and support stated in the posting include assistance for technical-book purchases and event participation fees, commuting allowance up to 150,000 yen per month, social insurance, a defined-contribution pension plan, leave programs, an employee stock ownership plan, and other health and welfare programs.
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