Backend Engineer

This role develops the backend for one of KAKEHASHI’s healthcare products: the cloud-based electronic medication record Musubi, the pharmacy management visualization service Musubi Insight, the patient follow-up system Pocket Musubi, the Musubi AI inventory management system, or the platform that retrieves prescription data.

The backend engineer works with product managers, designers, frontend engineers, other backend engineers, and pharmacists. As a backend specialist, the role contributes technical leadership to product development. Day-to-day work includes implementing services with TypeScript or Python, designing relational and NoSQL databases, and defining specifications with product managers. The role also includes feasibility studies based on technical knowledge.

The engineer designs and builds infrastructure using AWS serverless architecture and infrastructure-as-code tools such as AWS CDK and Terraform. Responsibilities include building and operating system monitoring with Datadog and Sentry, improving application code and AWS infrastructure, and advancing DevOps practices. Some functions may be converted to serverless or microservices architectures while balancing development speed and quality.

Because the products handle medical information, reliability and security requirements are emphasized. The role covers infrastructure as well as application implementation and focuses on maintaining dependable performance while continuing stable product development. The broader development organization includes approximately 180 engineers and product managers. The technical environment also references React and TypeScript, and the organization supports sharing knowledge through development blogs, study sessions, and conference presentations.

The stated selection process consists of document screening, a casual interview, two or three interviews, an aptitude test, a reference check using back check, and an offer meeting. The process may change depending on circumstances. The position is located in Minato, Tokyo. The source does not state salary, employment type, remote-work arrangements, working hours, language requirements, or visa sponsorship.