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Rails Engineer

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Full-time

Japanese?

Visa maybe

Remote

React

Rails

Build food-and-health web services with Rails, React and TypeScript, leading user-focused improvements from planning through implementation and working with AWS/GCP infrastructure.

About this role

This full-time Rails Engineer role develops the company's food and health services, including the Oishi Kenko web site and other related applications. The work covers both server-side and front-end implementation. Engineers are expected to consider improvements from the user's perspective, identify usability issues, and help shape measures that improve the service. The role can involve taking an idea from planning and design through implementation, release, and measurement of results.

Main backend responsibilities include designing and developing APIs, models, and databases with Ruby on Rails. Front-end work includes designing and implementing features with React.js, TypeScript, Haml, and Sass. The position also contributes to infrastructure construction for the company's services using AWS and GCP. AWS is the primary infrastructure platform, with services deployed on ECS. GCP is used for analysis and machine-learning tasks, and CircleCI is used for most services as the CI tool. A MacBook Pro is provided as the development machine.

Applicants are expected to have experience developing a service with a programming language, regardless of which language was used. Professional Ruby experience is not required for every applicant; experience with PHP or mobile application development can be used when changing into Ruby development. For the junior-development track, experience creating an application with Ruby or Ruby on Rails is requested, with at least four months of learning experience given as a guideline. Students applying through the new-graduate track are not eligible.

The engineering work supports a food and health domain. The company develops a meal-management application for patients and consumers, a dietary guidance solution for medical institutions called Kakaris, and other health-insurance-related services. Engineers work alongside designers and registered dietitians, and the team intends for engineers to take a leading role in planning user-growth and marketing measures, implementing them, and evaluating their effects.

The posting describes substantial engineering discretion over both product measures and technology choices. Source review by another engineer is required. The working environment uses remote work and core-time flextime. Online interviews are available. During the first six months, onboarding includes monthly one-on-one lunches with a mentor and regular meetings with the CEO.

Job details

Location
Tokyo
Employment
Full-time
Japanese
Japanese
Remote
Remote
Visa sponsorship
Visa Sponsor
Posted
2026-08-06
Category
Software & IT

About Oishi Kenko

Oishi Kenko is a Tokyo-based company that offers a dietitian-supervised recipe search and meal-planning service designed for individuals managing health conditions.

All Oishi Kenko jobs & company profile →

Company details

Size
Startup

AI-generated overview — may be incomplete or wrong, so don't rely on it fully.

This is an AI-generated summary of the employer's original posting — details can be incomplete, out of date or simply wrong. Always confirm everything on the official posting before applying.