Javascript Web Developer

Transforming Concepts into Seamless User Experiences

Hi, I'm Nakamura Seiji, a Next.js/Node.js developer based in Japan.

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I prioritize client collaboration, fostering open communication
I maintain flexible communication regardless of time zone.
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I constantly try to improve
My Tech Stacks
React.jsNext.jsVue.jsNuxt.jsNode.jsNest.jsLaravelCodeigniterSpring BootSolidityWeb3ScrapingJavascript(ES6)TypescriptPHPJavaTailwind CssMateril UIBootstrapStyled ComponentSassSEOCursor
Responsive Pixel-Perfect Web DesignMysqlPostgreSqlMongoDBAzureAWSDockerCI/CD pipelinesPostmanIsomniaSwaggerSupabaseStrapiStripeFirebaseGCPGitGitlabVercelNetlifyFigmaStorybook
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Tech enthusiast with a passion for development.
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The Inside Scoop
Fast, clear communicator, available to start right away and cooperate with team.
Scaleable Architecture, Pixel-Perfect Design, Reuseable Component, Clean UX

A small selection of recent projects

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Real-Time App with Stripe

Real-Time App with Stripe

Developed a real-time stock and user interaction platform using websocket, featuring secure Stripe payment integration and a high-performance, responsive UI across all devices.

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Source Code
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WordWise – Simple and clearly educational

WordWise – Simple and clearly educational

Built an educational multiplayer game using Pixi.js and TypeScript, with animated gameplay. Scaled for 10K+ users via AWS, Nginx, and CI/CD, ensuring smooth play across all devices.

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Source Code
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Kenzen Landing - HeatMonitor UI System

Kenzen Landing - HeatMonitor UI System

Real-time heat monitoring with wearable sensors, smart alerts, and a web dashboard. Protects workers by tracking vital signs, enabling preventive safety in high-risk environments across industries.

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Source Code
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Kenzen Admin – Smart Heat Monitoring & Alert System

Kenzen Admin – Smart Heat Monitoring & Alert System

A smart heat-monitoring platform built with React, Tailwind, and Redux. Features real-time alerts, Chart.js analytics, i18n, secure auth, sensor integration, and role-based dashboards.

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Source Code
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Yoom - Video Conferencing App

Yoom - Video Conferencing App

Simplify your video conferencing experience with Yoom. Seamlessly connect with colleagues and friends.

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Source Code
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Luxury Niche Fragrances Online

Luxury Niche Fragrances Online

Discover bold, luxurious niche perfumes crafted with rare ingredients. Free shipping on orders over $150

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Source Code
Visit

Kind words from satisfied clients

  • Collaborating with Nakamura Seiji was a game-changer. The real-time features were delivered flawlessly, and the Stripe integration was smooth and secure. Nakamura Seiji's responsiveness and attention to detail made the entire process seamless.
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    Emily CarterProduct Manager at TradePulse Inc
  • WordWise turned out even better than we imagined. The smooth real-time gameplay and polished user experience made it a hit with students. The Nakamura Seiji’s technical skill and understanding of educational needs were top-notch.
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    Ava ThompsonEducational Technology Lead at Horizon Learning Group
  • Nakamura Seiji made virtual collaboration effortless for our team. The call quality, reliability, and intuitive interface were a huge upgrade from what we used before. Truly a modern video conferencing solution.
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    Liam RodriguezOperations Manager at NovaSync Technologies
  • Every fragrance I’ve ordered has been stunning—rich, elegant, and truly unique. The packaging, service, and fast shipping make shopping here a luxurious experience from start to finish.
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    Isabelle LaurentLuxury Lifestyle Blogger & Fragrance Enthusiast

My work experience

My approach

User-First Web Design

I prioritize intuitive interfaces and consistent user experiences across all devices. By focusing on responsiveness, accessibility, and design precision, I ensure that every product not only looks great but also functions seamlessly for users in real-world scenarios.

Agile, Clear, Scalable

My workflow is built on agile principles, with clear communication using tools like Jira and Git. I collaborate closely with teams to adapt quickly, reduce friction, and deliver maintainable, scalable code that meets evolving project goals and client expectations.

Cloud-Native Delivery

I develop high-performance web solutions powered by AWS, CI/CD, and modern DevOps practices. This ensures fast, reliable deployments and infrastructure that scales with user demand while maintaining stability, security, and long-term maintainability.