# Jun Gu — KoS LLC

> Software Engineer, AI Specialist, and Founder of KoS LLC (合同会社KoS), based in Japan.

## About

Jun Gu is a software engineer and the founder of KoS LLC (合同会社KoS), a software development and AI consulting company based in Kawaguchi, Saitama, Japan. He specializes in building AI-powered applications, designing multi-agent systems, and integrating Large Language Models (LLMs) into production workflows.

## Expertise

- **AI & LLM**: AI agents, multi-agent orchestration, RAG (Retrieval-Augmented Generation), LLM integration, prompt engineering, AI adoption strategy
- **Mobile Development**: React Native, Expo, iOS/Android cross-platform apps
- **Web Development**: Next.js, TypeScript, Node.js, full-stack development
- **Backend & Infrastructure**: Firebase, PostgreSQL, cloud architecture
- **Blockchain**: Aptos ecosystem, DeFi development, smart contracts (Move language)

## Projects

### Atsusamu (あつさむ)
An AI-powered weather app for iOS that suggests daily outfit recommendations based on feels-like temperature and personal cold/heat sensitivity. Built with React Native, Expo, TypeScript, and Firebase. Available on the App Store.
- URL: https://apps.apple.com/jp/app/%E3%81%82%E3%81%A4%E3%81%95%E3%82%80/id6758752165

### Thought Articulator
An AI-powered journaling web application that helps users articulate their thoughts through conversational prompts. Designed to improve thinking clarity and writing quality.
- URL: https://thoughtartic.xyz/

### Nemuke
A new product currently in development. Details coming soon.

## Services

KoS LLC offers:
- **AI Consulting**: AI adoption strategy, LLM integration planning, multi-agent system design
- **Software Development**: Mobile apps (React Native/Expo), web apps (Next.js), full-stack solutions
- **CTO Advisory**: Technical leadership, architecture review, development process optimization
- **Freelance Engineering**: Available for contract work on AI, mobile, and web projects

## Contact

- Website: https://dokos.dev
- Email: jun.gu@dokos.dev
- X/Twitter: https://x.com/kossssss888
- GitHub: https://github.com/ko-syun

## Company

- Legal Name: 合同会社KoS (KoS LLC)
- Location: Kawaguchi, Saitama, Japan
- Domain: dokos.dev