YUMA Kitamura

Application Engineer & Engineering Manager

I am an Application Engineer and Engineering Manager based in Japan, specializing in frontend development with a focus on React, Flutter, and DevOps.

ReactFlutterTypeScriptJavaScriptScalaJava

View Projects

About Me

I am YUMA Kitamura, an Application Engineer, Engineering Manager with over 10 years of experience in building modern web applications. I am passionate about creating clean, efficient, and user-friendly interfaces.

Currently, I lead a development team as an Engineering Manager at wevnal, inc., focusing on creating innovative solutions for clients. While my core strength lies in frontend development with React, Vue, and TypeScript, I actively stay up to date with new technologies and frameworks.

Outside of development, I enjoy contributing to open source, writing technical articles, and sharing knowledge within the community. I also actively lead the organization of tech conferences such as FlutterKaigi and Frontend Conference Kansai.

Kyoto / Osaka, Japan

[email protected]

Available for freelance projects

nekohack Engineering Manager

Skills & Technologies

Frontend

HTMLCSSJavaScriptTypeScriptReactVueSvelteObjective-CSwiftJavaKotlinDartFlutter

Backend

Node.jsExpressJavaScalaFirebaseSupabaseGraphQLREST APIMongoDBPostgreSQLAWSGCPNetlifyVercelCloudflare

Tools & Others

OpenAI (ChatGPT)Anthropic (Claude)Google (Gemini)GitGitHubGitLabDockerCI/CDJestVitestTesting LibraryViteWebpackFigmaMiroAgileScrum

Work Experience

Application Developer

wevnal inc.2023 - Present

Responsible for leading the development team, establishing best practices, and improving code quality. Delivering high-quality web applications through technical decision-making, mentoring junior engineers, and collaborating with stakeholders.

Team LeadershipScenario DevelopmentTechnical ArchitectureCode Reviews

Full-stack Developer

vcube inc.2021 - 2023

Responsible for the development and maintenance of complex web applications using AWS, React, and TypeScript. Implemented new features and improvements in collaboration with designers and backend engineers, while contributing through code reviews and mentoring.

AWSReactTypeScriptFrontend Architecture

Full-stack Developer

smaregi inc.2019 - 2021

Responsible for the development and maintenance of web applications using AWS, Vue (React), and TypeScript. Promoted new feature implementations and improvements to existing functionality, contributing to quality enhancement through code reviews and other initiatives.

AWSVueReactTypeScriptAPI Architecture

Full-stack Developer

ponos inc.2016 - 2019

Responsible for the development of websites, management portals, and in-app browser views for the game title 'The Battle Cats' (HTML/CSS/JS/Vue). Executed pixel-perfect implementations and ensured cross-browser compatibility.

HTML/CSSJavaScriptVueJava/ScalaPHPResponsive Design

Key Projects

Tracc

A platform for centralized sponsorship management

Tracc dramatically streamlines sponsorship management for conference organizing teams, freeing them from complex administrative tasks so they can focus on core event operations.

FlutterDartTypeScriptNode.jsFirebaseCloudflareAWS S3React (partially)Remix (partially)

Brand Website

Luma Portal

A platform for centralized event management on Luma

Luma Portal dramatically streamlines event management for conference organizing teams, freeing them from complex administrative tasks so they can focus on core activities.

TypeScriptNode.jsCloudflareD1

Brand Website

Rocket Form

Bot management tool

Rocket Form is a tool designed to streamline bot management operations. It simplifies complex tasks and provides an environment where you can focus on truly important work.

TypeScriptNode.jsCloudflareD1

Brand Website

Commitment Board

Commitment board for tech conferences

Commitment Board is a dashboard for visualizing and sharing staff roles and weekly commitments at tech conferences.

TypeScriptNode.jsCloudflareD1

Brand Website

DL (DeepLink Redirect)

Link management & optimization tool

DL (DeepLink Redirect) is a visual dashboard designed to efficiently manage and optimize links.

TypeScriptNode.jsCloudflareD1

Product Website

IMGO (Image Go)

Image management & optimization tool

IMGO (Image Go) is a dashboard designed to efficiently manage and optimize images.

TypeScriptNode.jsRustCloudflareCloud Run

Product Website

nekohack Newspaper

Newspaper

Updates content every morning from Hatena Bookmark and Hacker News.

TypeScriptNode.jsCloudflareGoogle Gemini

Code Product Website

nekohack Portal

nekohack Corporate Site

A modern and responsive website built with Next.js and Tailwind CSS, featuring blog posts, team profiles, and social media hubs.

Next.jsReactTailwind CSSv0

Code Product Website

Multi Post Dash

Multi-SNS post dashboard

Multi Post Dash is a dashboard for bulk posting across multiple social media platforms.

TypeScriptNode.jsCloudflare

Code Product Website

Sheer Community

Sheer Music Unofficial Fan Community

A community app where fans can enjoy real-time chat, featuring content such as events and surveys.

TypeScriptNode.jsCloudflare

Code Product Website

KARAOKE BINGO

Karaoke Bingo

A community-integrated tool inspired by the popular song bingo feature on the Sheer Music YouTube channel, designed to make offline meetups and everyday karaoke even more fun.

TypeScriptNode.jsCloudflareD1

Code Product Website