Jun Gu
KoS LLC
Ship fast. Solve real problems.
Japan-based software engineer building AI-powered apps and multi-agent systems. From React Native mobile apps to Next.js web platforms — turning ideas into products people actually use.
Building things that matter.
Software Engineer and founder of KoS LLC. I build AI-powered products and design multi-agent systems that automate real workflows — not demos, but tools people actually use every day.
Passionate about AI agents, LLM orchestration, and bringing autonomous systems into production. From mobile apps to AI-driven platforms, I ship fast and iterate with real users. Currently focused on AI adoption strategy and building the next generation of intelligent tools.
Focus
AI Agents & Apps
Location
Japan
Status
Building
Company
合同会社ＫｏＳ
KoS LLC · dokos.dev
Things I've built.
From weather apps to AI journaling tools — real products shipped to real users.
Atsusamu
あつさむ
A weather app that suggests daily outfits based on feels-like temperature and your personal cold/heat sensitivity. Uses AI to learn your preferences over time.
Thought Articulator
An AI-powered journaling app that helps you articulate your thoughts clearly through conversational prompts. Think better. Write better.
Live
Japan Seasons API
REST API for Japanese seasonal data: cherry blossom forecasts, autumn foliage tracking, and festival listings. Built for AI agents and developers.
Coming Soon
Nemuke
Something new is in the works. Stay tuned.
More projects on GitHub ↗
Let's connect.
Have an idea, a question, or just want to say hi? I'm always open to conversations about interesting problems.
jun.gu@dokos.dev
Based in Japan · Available for collaboration