Cross-Platform Engineer

**About the company:** Scoville Tokyo Web-based HR products, cross-industry AI, IoT, Robotics, and Cloud & Big Data solutions. We work in a range of industries such as Human Resources, Hospitality, Education, Health Care, Warehousing & Inventory, and Health & Fitness. **Responsibilities:** Propose solutions as a technology specialist in a small product team to maximise user experience and business outcomes. Deliver working native applications for iOS, Android, macOS, and Windows from a single, white-labeled codebase. Work within our pnpm/Turborepo monorepo to build and maintain applications, shared packages, and tooling. Integrate and manage WebViews as a core part of the application, building the communication layer between the native shell and web content. Requirements Hold a degree in Computer Science or equivalent experience. 5+ years of recent commercial programming with a strong emphasis on delivering cross-platform mobile and desktop solutions. Expert understanding of React Native, React, Electron.js, and their ecosystems. Proven experience working in a monorepo (we use pnpm and Turborepo). Experience developing and maintaining white-label applications (managing multiple variants from a single codebase) Experience with Runtime-agnostic code that can safely be imported by either the Electron or React Native version of the noman app, whether by the main process or renderer process. Experience with Expo modules (even in a bare React Native workflow). Deep understanding of WebView integrations and building communication layers between the native shell and web content. Strong experience with JavaScript and TypeScript, and modern styling approaches. Experience with native build tools (Xcode, Android Studio) and the full mobile deployment process (App Store & Google Play), as well as desktop packaging for macOS and Windows (e.g., Electron Forge). Understanding of OIDC/OAuth2 and experience implementing mobile-friendly authentication flows. Experience writing native modules for React Native. Status of residence: For those in Japan: must have a working visa valid for more than six months. For those outside of Japan: remote contract work is available until a visa can be prepared. Nice to haves While not specifically required, tell us if you have any of the following. Japanese language proficiency (strongly preferred). Familiarity with advanced pnpm features like overrides and patching dependencies (using pnpm patch). Experience implementing cross-platform error monitoring (e.g., Sentry for both React Native and Electron). Experience with AWS Services (we use many different AWS Services). Experience working with UX Designers & exposure to tools such as Figma. Experience with type-safe validation libraries (e.g., Zod). Familiarity with modern code quality and formatting toolchains (ESLint, Prettier). Experience writing native modules for Electron or Node.js. Compensation Negotiable based on experience. APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION Meet Scoville's Developers Greenfield Development with a Global Team with Ellen Skipper At Scoville, Ellen works with a global team to develop a new management product for Japan’s visiting nursing industry. She talks about what drew her to Scoville, and the highlights and challenges of her work. Read their story... About Scoville Scoville Tokyo Web-based HR products, cross-industry AI, IoT, Robotics, and Cloud & Big Data solutions. We work in a range of industries such as Human Resources, Hospitality, Education, Health Care, Warehousing & Inventory, and Health & Fitness. Key benefits International and English-friendly Rapidly expanding Free weekly Japanese lessons Read more More jobs like this We'll send you a digest of new English-friendly software developer jobs in Japan. Your email stays private, we don't share or sell it. © 2026 Privacy Policy Get the newsletter × Insights into starting and growing your career as an English speaking developer in Japan, and new job opportunities as they are posted. **Requirements:** Hold a degree in Computer Science or equivalent experience. 5+ years of recent commercial programming with a strong emphasis on delivering cross-platform mobile and desktop solutions. Expert understanding of React Native, React, Electron.js, and their ecosystems. Proven experience working in a monorepo (we use pnpm and Turborepo). Experience developing and maintaining white-label applications (managing multiple variants from a single codebase) Experience with Runtime-agnostic code that can safely be imported by either the Electron or React Native version of the noman app, whether by the main process or renderer process. Experience with Expo modules (even in a bare React Native workflow). Deep understanding of WebView integrations and building communication layers between the native shell and web content. Strong experience with JavaScript and TypeScript, and modern styling approaches. Experience with native build tools (Xcode, Android Studio) and the full mobile deployment process (App Store & Google Play), as well as desktop packaging for macOS and Windows (e.g., Electron Forge). Understanding of OIDC/OAuth2 and experience implementing mobile-friendly authentication flows. Experience writing native modules for React Native. Status of residence: For those in Japan: must have a working visa valid for more than six months. For those outside of Japan: remote contract work is available until a visa can be prepared. **Nice to have:** While not specifically required, tell us if you have any of the following. Japanese language proficiency (strongly preferred). Familiarity with advanced pnpm features like overrides and patching dependencies (using pnpm patch). Experience implementing cross-platform error monitoring (e.g., Sentry for both React Native and Electron). Experience with AWS Services (we use many different AWS Services). Experience working with UX Designers & exposure to tools such as Figma. Experience with type-safe validation libraries (e.g., Zod). Familiarity with modern code quality and formatting toolchains (ESLint, Prettier). Experience writing native modules for Electron or Node.js. **Compensation:** Negotiable based on experience. APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION Meet Scoville's Developers Greenfield Development with a Global Team with Ellen Skipper At Scoville, Ellen works with a global team to develop a new management product for Japan’s visiting nursing industry. She talks about what drew her to Scoville, and the highlights and challenges of her work. Read their story... About Scoville Scoville Tokyo Web-based HR products, cross-industry AI, IoT, Robotics, and Cloud & Big Data solutions. We work in a range of industries such as Human Resources, Hospitality, Education, Health Care, Warehousing & Inventory, and Health & Fitness. Key benefits International and English-friendly Rapidly expanding Free weekly Japanese lessons Read more More jobs like this We'll send you a digest of new English-friendly software developer jobs in Japan. Your email stays private, we don't share or sell it. © 2026 Privacy Policy Get the newsletter × Insights into starting and growing your career as an English speaking developer in Japan, and new job opportunities as they are posted.