Works

Profile, development work, community involvement, career history, and more (adding past content gradually)

Profile

Yoshikatsu Nishida

Yoshikatsu Nishida

Software Engineer

Currently working as a freelance engineer. Since my student days, I have been passionate about building things across both hardware and software. I primarily worked as a web frontend engineer developing BtoB SaaS products at startups. In the AI era, I aim to contribute by focusing on building high-quality software foundations, refining development processes, and enhancing UI/UX to drive project momentum.

Favorite Tech

TypeScriptReactNext.jsThree.jsR3FWebXRSWRVitestHonoDrizzle ORMFumadocsZodClaude Code
GitHubXResume

Development

View all

Showcasing products built through personal and hobby projects

  • nisshi-dev-survey
    ActivePersonalWeb App

    nisshi-dev-survey ロゴnisshi-dev-survey

    Google Formsの軽量版。AIエージェントからアンケート設計〜データ投入まで一気通貫で自動化できます。

    Feb 17, 2026 – Present
    Demo
    TypeScriptReactViteReact Router+14
  • nisshi.dev
    ActivePersonalWeb App

    nisshi.dev ロゴnisshi.dev

    ブログ・スライド・制作物・活動履歴を一元管理するポートフォリオサイト。3DモデルやVR180画像・動画をカスタムビューアーでブログに埋め込めるほか、いいね・コメント機能なども備えています。

    Dec 25, 2025 – Present
    TypeScriptReactNext.jsTailwind CSS+15
  • リアルVRネームプレート
    ActiveTeam3D Print / Web App

    リアルVRネームプレート ロゴリアルVRネームプレート

    VRChatのフレンドとリアルで会ったとき、顔と名前が一致しない問題を解決するネームプレート。現実世界でもバーチャルの名前を可視化できます。

    Aug 3, 2024 – Present
    Demo
    3DプリントFusion 360レーザー加工Next.js+7
  • 山口県 新型コロナウイルス感染症対策サイト
    ArchivedTeamWeb App

    山口県 新型コロナウイルス感染症対策サイト ロゴ山口県 新型コロナウイルス感染症対策サイト

    東京都のオープンソース対策サイトをベースに、山口県版として開発・運用した公認サイトです。オープンデータと連携し、感染状況を自動更新で可視化していました。2023年3月末にサービス終了。

    Mar 19, 2020 – Mar 31, 2023
    Demo
    Vue.jsNuxt.jsTypeScriptPython+3

Community

Introducing tech communities I help organize and run

  • WebXR JP
    Active

    WebXR JP / 運営

    WebXR・Web3Dに関心のあるエンジニア・クリエイターが集まる日本語の技術コミュニティを友人らと立ち上げ、運営。

    May 17, 2025 – Present
  • Web技術集会
    Active

    Web技術集会 / 主催

    VRChat上でWeb技術について気軽に話せる技術系集会を立ち上げ、毎週水曜22時から定期開催。

    Nov 5, 2024 – Present
  • VRChat近況報告会
    Active

    VRChat近況報告会 / 主催

    技術や作品の近況を共有するVRChat上の雑談系イベントを立ち上げ、毎週金曜21時から定期開催。

    Dec 1, 2023 – Present
  • Code for Yamaguchi
    Active

    Code for Yamaguchi / 運営

    山口県にゆかりのある挑戦者を応援するテックコミュニティを立ち上げ、運営。

    Apr 25, 2021 – Present

Speaking, Judging & Exhibitions

View all

Events where I have spoken or exhibited

Career

Experience

ShareBrowse Inc.

CEO

2022/3 – 2026/3

Founded upon university graduation. Took on a wide range of projects including contract development of business systems such as inventory management with Next.js, prototype development for new businesses (Web, mobile apps, VR/AR), corporate website development with microCMS, metaverse event planning for local governments using Cluster, and public speaking.

Butterfly Dream Lab Inc.

Board Member

2024/5 – 2025/9

Managed multiple projects in social VR spaces, including gimmick development for "Virtual Dice Party 2024 with Bouken Kikakukyoku," an analog game exhibition on VRChat.

Excite Holdings / XTech Inc.

Business Creation Intern "READY" 4th Cohort

2022/8 – 2022/8

Participated in a two-week internship learning startup studio business creation methodologies. Attended lectures from executives and entrepreneurs, and practiced business model development, market research, marketing strategy, and P&L creation in groups.

YUMEMI Inc.

Server-side Engineer (Intern)

2022/3 – 2022/3

Participated in a lecture-based internship covering database design (ER diagrams, normalization), WebAPI design (RESTful principles, URL design), authentication/authorization (MFA, RBAC, session management), and AWS infrastructure (VPC, serverless architecture).

Sansan, Inc.

Sansan Tech Internship Trigger 2021

2021/9 – 2021/9

Participated in a hackathon-style internship combining business planning and product development. Built a platform for renting parked car spaces as a 4-person team, primarily handling frontend implementation.

Triple E Inc.

Intern

2021/4 – 2022/3

Delivered the initial release of "Belle," a knowledge management module within the entrepreneur support platform "NOAH." Worked in a two-person team with a tech lead, handling the full cycle from tech selection, API/DB/infrastructure design to environment setup, feature development, and operation. Stack: Next.js, NestJS, Prisma, GCP, Firebase, etc.

Kyujitsu Hack Inc.

Engineer (Part-time)

2020/12 – 2021/9

Worked on in-house service development, handling payment processing and point redemption on the server-side with Ruby on Rails, along with frontend development with Next.js and a lightweight CRM system.

CyberAgent, Inc.

CA Tech Challenge (Intern)

2019/9 – 2019/9

Developed a program recommendation feature for ABEMA using machine learning.

Sonas, Inc.

Engineer (Intern)

2019/8 – 2019/9

Developed a data collection system using various sensors on "Dash," a PoC platform for UNISONet-enabled devices. Implemented data integrity checks and loss-recovery mechanisms to handle partial data corruption in stream processing.

ソナスの2019年夏期インターン終了のご報告

Nikensha

Engineer (Part-time)

2019/6 – 2019/7

Wrote blog posts on machine learning and verified sample code for the company's published books.

VOYAGE GROUP, Inc.

Intern

2019/5 – 2019/5

Participated in a one-day internship on web application and team development with Go, in a hands-on format.

teamLab Inc.

Intern

2019/3 – 2019/3

Assigned to the image processing team for two weeks. Implemented unverified algorithms in Python 3 based on image recognition research papers, and conducted experiments.

FIXER Inc.

Intern

2017/8 – 2017/8

Worked as a team on developing an Alexa Skill powered by Azure.

Education

Yamaguchi University

Faculty of Engineering, Dept. of Intelligent Information Engineering

2019/4 – 2022/3

Graduation research on "Social Implementation of CivicTech — Through Launching and Operating an OSS Project in Yamaguchi Prefecture."

National Institute of Technology, Matsue College

Dept. of Electronics and Control Engineering

2014/4 – 2019/3

Passionate about KOSEN Robocon, serving as mechanical designer and team leader. Graduation research on shadow color correction for road surface region extraction using CNN.

Awards

Contact

Nickname is also acceptable

Inquiry Type