Haruki Mizuno | Mobile App Developer & Full Stack Engineer

My services .

From mobile apps to trading systems, I deliver scalable, reliable solutions with clean architecture and modern tech stacks.

Mobile App Development

Native iOS (Swift), Android (Kotlin), and cross-platform apps with Flutter & React Native. Performance-optimized, scalable architecture.

Full Stack Development

React, Next.js, Vue.js, Node.js, Express, FastAPI. RESTful & GraphQL APIs. TailwindCSS for responsive, modern UIs.

Trading Systems

Automated trading platforms with live market data, IBKR, ThinkorSwim, Schwab, TastyTrade, Binance, and analytics APIs.

Backend & Cloud

AWS (EC2, S3, Lambda, DynamoDB), Firebase, PostgreSQL, MongoDB, Redis. Docker containers and CI/CD pipelines.

AI Integration

OpenAI API, machine learning integration, quantitative analysis, and data pipelines for data-driven applications.