Yusuke- Personal Portfolio

About me

• Senior Full Stack Web Developer with 9+ years of experience building scalable and high-performance web applications using the MERN stack and modern cloud technologies.
• Highly adaptable to emerging technologies, particularly AI and Blockchain, with proven experience delivering innovative solutions for real-world business needs.
• Skilled in architecting AI-powered systems, integrating frontend and backend services, cloud infrastructure, databases, and automation workflows to build secure and scalable applications.
• Strong team player focused on clean architecture, performance optimization, problem-solving, and exceptional user experience.

What i'm doing

Web design

The most modern and high-quality design made at a professional level.
Web development

High-quality development of sites at the professional level.
Mobile apps

Professional development of applications for iOS and Android.
Ecommerce Platforms

scalable ecommerce platforms with modern frontend architecture, payment integrations

Resume

Education

Hokkaido University(Japan)
Bachelor of Computer Science(2010 – 2014)
• Actively participated in the Computer Science program through software development projects, coding activities, and collaborative technical workshops focused on modern web and application technologies.
• Recognized for developing an innovative application solution during a university programming competition, demonstrating strong skills in problem-solving, software engineering, and team collaboration.

Experience

Senior Software Engineer(Walmart, Inc - remote)
AI & automation solutions development(07/2023 – 11/2025 Arkansas, United States)
• Solved complex software engineering challenges related to cybersecurity, system reliability, authentication, access control, API security, data protection, and infrastructure hardening for production environments.
• Developed AI-powered platforms and intelligent automation systems using OpenAI API, machine learning integrations, and modern frontend technologies such as React and Next.js to improve business workflows and user engagement.
• Integrated real-time AI features, conversational AI assistants, recommendation systems, and workflow automation tools that enhanced customer experience and reduced operational overhead.
• Focused on clean architecture, high-performance systems, security best practices, and scalable software engineering solutions for enterprise and SaaS applications.
Mid-Level Full Stack web developer (Web Guru’s LLC - remote)
Web development and enterprise business solutions(02/2019 – 04/2023 New York, United States)
• Developed scalable and responsive web applications using React.js, Next.js, Node.js, TypeScript, and MongoDB, improving application performance and system efficiency by 40%.
• Built and integrated backend APIs, authentication systems, admin dashboards, and ecommerce functionalities, reducing manual workflow processes by 35% and improving operational productivity.
• Optimized frontend rendering, API response handling, and application responsiveness, increasing page load performance and user engagement by 45%. • Collaborated with remote development teams and international clients in agile environments, contributing to feature planning, debugging, testing, deployment, and long-term product maintenance.
• Integrated Firebase, Supabase, payment gateways, and third-party services, improving system reliability, scalability, and cloud-based application performance by 30%.
Junior Full Stack web developer(Geniee company- onsite)
Web application and SaaS platform development(07/2015 – 10/2018, Hokkaido, Japan)
• Developed responsive and scalable web applications using React.js, Next.js, TypeScript, and frontend technologies for startup and enterprise clients.
• Built reusable UI components, optimized frontend performance, and integrated REST APIs and cloud-based services to improve application efficiency and user experience.
• Collaborated with cross-functional teams in agile development environments, contributing to project planning, feature implementation, debugging, testing, and deployment processes.
• Worked closely with backend engineers and designers to ensure seamless integration between frontend interfaces, APIs, databases, and cloud infrastructure while maintaining scalability and performance optimization.
Software Engineering Intern (WealthNavi company - onsite)
Software development and business application solutions(01/2015 – 06/2015, Tokyo, Japan)
• Applied academic knowledge in software engineering, web development, and database systems to real-world business applications while working in a fastpaced professional environment.
• Gained hands-on experience in translating theoretical concepts into practical development solutions, understanding the differences between university-level programming and real production systems used by businesses and clients.