Staff Backend Engineer - Fastest Growing AI R&D Firm / Remote OK!

About the Company

The company is a fast-growing AI startup building the next generation of Artificial General Intelligence from Japan. Backed by one of Japan's largest early-stage funding rounds, the company is developing personalized and global AI products that have the potential to transform how people interact with technology.

What You'll Do

As a Principal Backend Engineer, you will lead the architecture and development of highly scalable backend systems powering cutting-edge AI products. You'll drive technical decisions, improve system performance and reliability, mentor engineers, and work closely with AI researchers to bring advanced technologies into production.

Who You Are

• 8+ years of backend engineering experience with large-scale distributed systems
• Strong system design expertise (databases, caching, messaging, cloud infrastructure)
• Experience with AWS, GCP, or similar cloud platforms
• Proficiency in Go, Rust, or C++
• Experience leading complex technical projects
• Fluent English and business-level Japanese

Why Join?

• Build next-generation AGI technology with global impact
• Own architecture and technical direction of core AI products
• Work alongside top AI researchers and experienced engineers
• Full remote anywhere in Japan with hybrid flexibility

Compensation

Salary is negotiable up to JPY 20M+

Benefits

• Stock options
• Flexible working hours
• Excellent learning support