[High pay/ Full Remote /Unlimited PTO] Senior Frontend Engineer | Build what's next

You’ll work directly on core product experiences, influence frontend architecture, and own meaningful problems from first principles through production. The environment is fast, highly autonomous, and engineering-led. Small team. High trust. Very little bureaucracy.

You’ll have real ownership across frontend architecture, complex UX, performance, and product delivery - working closely with Product, Design, and Engineering to turn ambitious ideas into polished, production-grade experiences.

What you’ll do

• Own end-to-end frontend workstreams across web and mobile products
• Build scalable applications with TypeScript, React, and TanStack
• Shape frontend architecture, performance, testing, and engineering standards
• Build intuitive experiences for complex, data-rich products
• Partner closely with Product, Design, and Backend teams

• 5+ years of frontend engineering experience
• Strong TypeScript / modern JavaScript skills
• Deep React knowledge and strong frontend architecture fundamentals
• Experience with TanStack Start, Next.js, Remix, or similar frameworks
• Comfortable owning projects in fast-moving, ambiguous environments
• Strong communication and product sense
• Candidates already located in Japan, with fluent Japanese communication skill a must
• Experience working at popular local companies (e.g: Mercari, Line, Smartnews, Indeed, Amazon, Google etc.)

Bonus: Web3/blockchain experience, AI-assisted development (Cursor, Copilot, Claude, etc.), or startup/scale-up experience.