Bilingual Mobile Engineer (JP/ENG) | Flutter | React Native - Up to 13M JPY

A rapidly growing international start up is looking for a Mobile Engineer to join their team.This is a great opportunity for someone who enjoys building products from the ground up, working with modern technologies, and having real ownership over technical decisions.You’ll work across mobile development, backend integration, system architecture, and AI-powered features in a highly autonomous engineering environment.🔧 What You’ll Do

• Design, develop, and optimize cross-platform mobile applications
• Work with Flutter and/or React Native (Expo)
• Develop and integrate server-side APIs
• Contribute to system architecture and technical decision-making
• Build and integrate practical AI-powered features and automation
• Use modern AI development tools to improve development efficiency and code quality
• Help establish engineering best practices and scalable development processes✅ Requirements
• 3+ years of professional experience as a Mobile Engineer
• Strong experience developing cross-platform mobile applications
• Hands-on experience with Flutter and/or React Native (Expo)
• Experience working with server-side APIs
• Experience using modern AI-assisted development tools
• Strong technical judgment and ability to evaluate and improve AI-generated code
• Business level English and Japanese🌏 Why Consider This Opportunity?
• Work with an international user base
• High level of autonomy and ownership
• Opportunity to influence technical architecture and product development
• Work with modern mobile and AI technologies
• Fast-growing environment with opportunities for professional growth
• Competitive salary of up to ¥13,000,000 JPY📍 Location: Tokyo, Japan💰 Salary: Up to ¥13M