Isao Kozakai
I’m Isao Kozak, a full-stack software developer with 8+ years of experience building responsive web and mobile applications, with a strong focus on user-centered solutions.
About
I’m Isao Kozak, a full-stack software developer with 8+ years of experience building responsive web and mobile applications, with a strong focus on user-centered solutions. I enjoy turning complex requirements into reliable, maintainable systems, and I’m known for being detail-oriented, collaborative, and quick to learn new technologies.
Across recent roles, I’ve worked on loyalty and rewards platforms (including mobile apps built with Flutter), insurance marketplace platforms, and real-time chat systems. I bring hands-on experience with TypeScript, React, React Native, Redux, Node.js, Go, GraphQL, PostgreSQL, MongoDB, and related tooling—while consistently improving performance through refactoring, comprehensive testing, and thoughtful system enhancements.
- 9 years' experience
- Joined September 2026
Industry experience
- Software & Internet
Work experience· 6 roles
Developed full-stack loyalty & rewards platforms spanning mobile apps (Flutter), web apps (React), and backend services (Go). Implemented a QR-based reward redemption flow in the mobile application. Built internal operational tooling including a QR scanner app and an admin panel to support operations and campaign management. Focused on user experience, maintainability, and delivery of end-to-end features across the stack.
Developed an insurance marketplace platform using React, TypeScript, Go, Python, GraphQL, and PostgreSQL. Improved codebase quality through effective refactoring to enhance readability and efficiency. Increased application reliability by promptly fixing bugs and performing comprehensive testing. Proposed and implemented system improvements that enhanced performance and user satisfaction.
Developed a supply chain management platform using React/Redux, Node.js/Express, MongoDB, and GraphQL. Wrote comprehensive unit tests to ensure robustness and reliability. Completed prompt bug fixes to enhance functionality and user experience. Conducted code refactoring to improve readability and efficiency, and provided internal feedback and suggestions to streamline processes and improve system performance.
Education
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