Making everyday life a little better with software
Founded RYNK as a sole proprietorship while studying engineering at Hokkaido University.
RYNK Founder
Sole Proprietor / Software Engineer
I started learning web development — HTML, CSS, and PHP — in 5th grade, and I've been writing code for about 10 years since. Over time I expanded into Python, Java, C, and mobile app development. Today I specialize in full-stack development with Flutter, Next.js, Firebase, and AI APIs.
While studying engineering at Hokkaido University, I founded RYNK as a sole proprietorship in 2026. Under the motto "Link the Dots.", I build products that connect people and ideas, and offer end-to-end contract development from planning to launch. Coding with music on is still my favorite way to unwind.
For me, coding is both a passion and a profession — I'm an engineer who genuinely loves the craft. Turning "I wish this existed" into something real is still the best playground I know.
Skill set
Frontend
Mobile
Backend
AI・API
Infra
Career
- 2026
RYNK 開業
北海道大学工学部在学中に個人事業「RYNK」を開業。自社プロダクト開発と受託開発を開始。
- 2025
Tekipa・ShiftMaster 開発
キャンパスマーケットプレイス「Tekipa」、シフト管理アプリ「ShiftMaster」の設計・開発を推進。
- 2024-04
北海道大学 工学部 入学
工学部に入学。大学での学びと並行して個人開発に本格的に取り組み始める。
- 2016
プログラミングを始める
小学5年生でWeb制作に興味を持ち、HTML・CSS・PHPを独学で習得。以降、Python、Java、C、スマホアプリ開発へと領域を拡大。約10年にわたり継続的にスキルを磨く。
Company overview
- Business name
- RYNK
- Location
- Sapporo, Hokkaido, Japan (details shared upon engagement)
- Business activities
- - Planning, requirements, UI/UX design, development, and operation of smartphone applications- Planning, frontend development, backend development, and operation of web services and SaaS- Feature expansion and workflow automation tools using AI models- Planning, development, and operation of in-house products
- Founded
- 2026 (established as a sole proprietorship)