Frontend Engineer

Frontend Engineer (React / TypeScript)Location: Tokyo (Hybrid Remote) Employment Type: Full-timeSalary: ¥5,000,000 – ¥9,000,000 annuallyJapanese Level: IntermediateAbout the CompanyOur client is an AI technology company developing advanced privacy-preserving computing solutions that enable organizations to securely utilize sensitive data for AI and analytics.Through its innovative platform, the company helps enterprises unlock the value of confidential data while maintaining the highest standards of security and privacy. Its technology is applied across industries where secure collaboration and AI-driven insights are essential.As part of its growing AI product development team, the company is looking for a Frontend Engineer to help build intuitive interfaces for complex, data-driven workflows.ResponsibilitiesDevelop and maintain modern frontend applications using React and TypeScriptBuild spreadsheet-like editable data grids for large datasetsDevelop drag-and-drop interfaces for dataset compositionDesign intuitive workflows for complex data processing tasksIntegrate frontend applications with RESTful APIsCollaborate closely with backend engineers and product teamsImprove usability, performance, and maintainability of the frontend applicationContribute to product direction within a small, highly autonomous engineering teamTechnology StackFrontendReact 19TypeScriptViteChakra UI v3TanStack RouterTanStack QueryTanStack TableDevelopment ToolsOpenAPI-generated typed API Clientreact-i18nextPlaywrightBiomeRequirementsMust Have5+ years of professional software development experienceStrong experience with ReactStrong experience with TypeScriptExperience integrating RESTful APIsExperience building UIs using component libraries or design systems (e.g. Chakra UI, Material UI)Passion for AI and secure computing technologiesBusiness-level English communication skillsCurrently residing in Japan, or previously lived in Japan with plans to relocate backNice to HaveExperience developing SaaS products on AWSExperience building products from 0→1Experience developing complex, data-heavy user interfaces (editable grids, tables, drag-and-drop interfaces, complex forms)Business-level Japanese proficiencyWhy Join?Design sophisticated frontend experiences used by enterprise R&D teamsWork with a modern React 19 and TypeScript tech stackJoin a small engineering team with significant ownership and autonomyContribute directly to product direction and user experienceGain hands-on experience with secure computation and advanced AI technologiesWe still have more positions available across different roles. If this isn’t the perfect fit, explore our other openings and feel free to apply!