Staff Software Engineer - Next-Gen AI Startup - Up to 25M

About the Company

A fast-growing AI company is developing next-generation Artificial General Intelligence (AGI) and global AI-powered consumer products. Backed by approximately ¥10 billion in funding, the company is building personalized AI that adapts to each user while collaborating with leading industry partners to accelerate innovation.

Job Responsibilities

As a Staff Software Engineer, Backend, you will take ownership of the architecture and technical direction of backend systems powering advanced AI products. You will design and build scalable distributed systems, improve system reliability and performance, and drive technical solutions for complex engineering challenges. You will also contribute to engineering excellence by improving development processes, mentoring engineers, and collaborating closely with AI researchers and product teams to deliver innovative products at a global scale.

Requirements

• 8+ years of backend software engineering experience.
• Strong experience with distributed systems and system design.
• Expertise in cloud platforms (AWS, GCP, etc.).
• Proficiency in Go, Rust, or C++.
• Experience leading technical initiatives and mentoring engineers.
• Fluent English communication. Fluency in Japanese is preferred.

Benefits

• Highly competitive salary package.
• Flexible working environment (almost fully remote).
• Work on cutting-edge AGI technology.
• High ownership and technical autonomy.
• Join one of Japan's fastest-growing AI startups.