This is the profile page of Yuki Igarashi (GitHub: rasshii), who runs this site.
About this site
- Concept: Learn by reinventing the wheel — by deliberately rebuilding or reorganizing existing tools and concepts, I aim to understand how they really work
- Structure: Blog + documentation together (Docusaurus + Vercel hosting)
- Scope: Frontend / backend / infrastructure / AI / learning logs, and more
- Languages: Japanese / English
- License: Articles = CC BY 4.0 (planned) / Code = MIT (planned)
For the story behind the domain change and site rename, see I moved the blog domain to notes.rewheel.dev.
Profile
- Name: Yuki Igarashi
- Affiliation: Codmon Inc. / Marketing Engineer team
- Role: ME (Marketing Engineer)
- Handle: rasshii
- Motto: "An investment in knowledge pays the best interest."
Career
| Period | Affiliation | Role |
|---|---|---|
| 2023.6 – present | Codmon Inc. | Marketing Engineer team (ME) |
| 2021.3 – 2023.5 | Uniquest Inc. | SRE |
| 2019.2 – 2020.10 | Nia Inc. | Programmer, ICT Division |
| 2013.4 – 2019.1 | East Japan Railway Company (JR East) | Sendai Branch |
| 2011.4 – 2013.3 | Niigata University Graduate School of Science and Technology | Electrical & Electronic Information Engineering (Master's) |
Research Activities
Research results from my time in graduate school, focused on review-based recommendation systems on the web.
| Date | Venue | Title |
|---|---|---|
| 2015 | Transactions of the Japanese Society for Artificial Intelligence | Movie Recommendation Using Reviews on the Web |
| 2012.11 | Asia Pacific Industrial Engineering and Management Systems Conference (International Conference) | Onsen Recommendation based on User Reviews on the Web |
| 2011.11 | Rakuten R&D Symposium | Classification of Reviews of Onsen into the Five-Sense Categories |
I contributed to the research behind this paper as a student, mainly in charge of system development. My academic advisor submitted the paper to the Transactions of the Japanese Society for Artificial Intelligence after I graduated; the advisor is credited as the author, and I am acknowledged in the paper as a contributor.
Skills
| Category | Details |
|---|---|
| Cloud | AWS (EC2, Lambda, S3, CloudFront, CLI) |
| IaC / CI/CD | Terraform, GitHub Actions, Atlantis |
| Frontend | Nuxt 3, Vue, JavaScript, TypeScript, Next, React |
| Backend | Node.js, Lambda (SAM), Laravel, PHP, MySQL |
| Monitoring | Datadog, CloudWatch |
| Other | Docker, Git |
Areas of interest
- Building design systems
- BFF (Backend for Frontend) architecture
- AI agent development (Claude / Anthropic SDK)
- Full-text search systems
- Improving the developer experience (DX) with an SRE mindset
Links
- X (formerly Twitter): @tekuteku_1104
- Zenn: @rasshii
- Wantedly: Profile
- GitHub: rasshii
Contact
Feel free to share your thoughts and feedback via the Tweet your thoughts on 𝕏 button at the bottom of each article, or through the external links above (X / Wantedly / GitHub).