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Full Stack Developer with over 8 years of experience in Node.js(JavaScript/TypeScript), PHP, Python, NestJS, React, Next.js, d Vue, Nuxt.js, Svelte. I delivered AI-powered features, improved test coverage, reduced costs, and built robust API servers with Nest.js and Next.js. I'm passionate about clean, readable code and a collaborative, stress-free environment through setting up CI/CD pipelines and automated tests to streamline workflows. Also, I led frontend team and trained developers.…Full Stack Developer with over 8 years of experience in Node.js(JavaScript/TypeScript), PHP, Python, NestJS, React, Next.js, d Vue, Nuxt.js, Svelte. I delivered AI-powered features, improved test coverage, reduced costs, and built robust API servers with Nest.js and Next.js. I'm passionate about clean, readable code and a collaborative, stress-free environment through setting up CI/CD pipelines and automated tests to streamline workflows. Also, I led frontend team and trained developers.

Tomohiro Yanagi

Full Stack Developer, Web Developer, Front-End Developer, +2

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Full Stack Developer with over 8 years of experience in Node.js(JavaScript/TypeScript), PHP, Python, NestJS, React, Next.js, d Vue, Nuxt.js, Svelte. I delivered AI-powered features, improved test coverage, reduced costs, and built robust API servers with Nest.js and Next.js. I'm passionate about clean, readable code and a collaborative, stress-free environment through setting up CI/CD pipelines and automated tests to streamline workflows. Also, I led frontend team and trained developers.…Full Stack Developer with over 8 years of experience in Node.js(JavaScript/TypeScript), PHP, Python, NestJS, React, Next.js, d Vue, Nuxt.js, Svelte. I delivered AI-powered features, improved test coverage, reduced costs, and built robust API servers with Nest.js and Next.js. I'm passionate about clean, readable code and a collaborative, stress-free environment through setting up CI/CD pipelines and automated tests to streamline workflows. Also, I led frontend team and trained developers.

Available to hire

Full Stack Developer with over 8 years of experience in Node.js(JavaScript/TypeScript), PHP, Python, NestJS, React, Next.js, d Vue, Nuxt.js, Svelte.

I delivered AI-powered features, improved test coverage, reduced costs, and built robust API servers with Nest.js and Next.js. I’m passionate about clean, readable code and a collaborative, stress-free environment through setting up CI/CD pipelines and automated tests to streamline workflows.

Also, I led frontend team and trained developers.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Japanese

Fluent

English

Advanced

Work Experience

Full Stack Developer at Open Heart Inc.

August 1, 2024 - Present

Developed and maintained AI-powered features, including generating 3D visuals from images or videos; built Nest.js API server and database schemas from scratch; led frontend and backend development, implemented CI/CD, and mentored new developers.

Senior Front End Developer at YAM API Inc.

March 1, 2024 - September 16, 2025

Provided mobile and web app solutions for hiking mountains. Led a frontend team of 5 developers. Reduced monthly costs by 5000 USD through app expense analysis. Increased test coverage from 2% to 65% for a web frontend product via test automation and mentoring. Improved main page load time by 10x by diagnosing slowdowns and coordinating with backend.

Back End Developer at Galirage Inc.

July 31, 2024 - Present

Consulting and developing AI products. Developed features to review job interview videos with LLMs for practice for students within one month.

Front End Engineer at Hamee

April 30, 2021 - September 14, 2025

Sold smartphone accessories and provided an EC platform; replaced legacy visuals on the EC platform through leadership in projects. Expanded EC platform with 5 features using PHP. Developed API server to exchange messages between mobile app and IoT product; used Node.js and AWS to convert text to speech. Launched a web app with Next.js and TypeScript.