Hi, I'm Grant Dai

A software engineer and technical lead based in Tokyo.

Over the past 10+ years, I’ve built large-scale systems at companies like Rakuten and Fast Retailing — from analytics infrastructure handling 300,000 requests per second. to e-commerce platforms serving millions of users across global markets.

Build Better Systems. Think Longer-Term. Stay Human

I write about software, AI, leverage, in another word, what comes next for engineers and the industry as a whole.

Today, my focus is the intersection of AI and software development: LLM-powered workflows, developer tooling, agent systems, and how engineers can build leverage instead of becoming overwhelmed by noise.

But this site isn’t about chasing every AI trend

The AI space moves incredibly fast, and most people are consuming more information than they can meaningfully process.

I’m more interested in filtering signal from hype — understanding which skills, systems, and ways of thinking will still matter 5–10 years from now.

All articles of this site are what I’m learning — practical ideas, technical deep dives, and observations about where software, AI, and human potential are heading next. It's typically made for those who feel the industry changing fast and want to adapt intentionally.