Isao Kozakai
@isaokozakai
Full-Stack Developer with 7+ years of experience in web applications.
What I'm looking for
I'm a Full-Stack Developer with over 7 years of experience in creating responsive web and mobile applications. My expertise lies in a variety of technologies including TypeScript, React, and Node.js, which I leverage to deliver user-centered solutions. I take pride in my problem-solving abilities and my commitment to innovation, ensuring that every project I work on meets high standards of quality and performance.
Throughout my career, I've had the opportunity to work on diverse projects, from developing an insurance marketplace platform to leading the creation of a real-time chat application for students. My experience includes optimizing codebases for readability and efficiency, mentoring new team members, and actively contributing to application reliability through comprehensive testing and prompt bug fixes. I thrive in collaborative environments where I can learn new technologies and contribute effectively to team success.
Experience
Work history, roles, and key accomplishments
Software Developer
Makkke Digital Inc.
Jan 2023 - Oct 2024 (1 year 9 months)
Developed an insurance marketplace platform using React, TypeScript, Go, Python, GraphQL, and PostgreSQL. Optimized codebase with effective refactoring to boost readability and efficiency. Actively contributed to application reliability by fixing bugs promptly and performing comprehensive testing.
Software Developer
BASE
Apr 2022 - Jan 2023 (9 months)
Led development of a real-time chat application for students, using Golang and Couchbase for backend, and TypeScript with React + MobX for web and React Native + Redux for mobile. Enhanced user experience by designing features that analyze user traits based on interaction patterns. Optimized trait analysis calculations, resulting in a significant reduction in processing time.
Software Developer
Omnae Technologies Inc.
Sep 2020 - Feb 2022 (1 year 5 months)
Developed a supply chain management platform using React/Redux, Node.js/Express, MongoDB, and GraphQL. Wrote comprehensive unit tests to ensure the robustness and reliability of the developed platform. Executed prompt bug fixes, enhancing the functionality and user experience of the platform.
Software Developer
bBreak Systems Co., Ltd.
Jul 2015 - Feb 2019 (3 years 7 months)
Developed and optimized key features for an electricity management app and a telecom billing system using Java, JavaScript, and Oracle Database. Conducted code reviews to uphold high-quality standards and facilitated offshore team coordination for prompt bug resolution. Guided new team members, enabling smooth project onboarding and efficient workflow.
Software Developer
All In One Solution Technology Inc.
Feb 2014 - Jun 2015 (1 year 4 months)
Developed an e-commerce application using Java and Oracle Database, contributing to the successful implementation of critical features and functionalities. Instructed new team members on the creation of effective tests, ensuring a streamlined project workflow and comprehensive testing coverage.
Education
Degrees, certifications, and relevant coursework
Cornerstone International College
Web & Mobile App Development Diploma, Web & Mobile App Development
Completed a diploma program focused on web and mobile application development. Gained practical skills in various programming languages and frameworks relevant to modern software development.
Tokai University
Bachelor of Arts, Japanese History
Studied Japanese History, gaining a deep understanding of historical research methods and critical analysis. Developed strong analytical and communication skills through extensive coursework and research projects.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
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