I'm a final-year law student at Gakushuin, but pretty much everything I know about building, I taught myself. I'm into AI and FinTech, digging into copyright and payment-services law on the side — and honestly, law and engineering feel worlds apart until you find the spots where they overlap, which is where it gets fun. I've shipped as a full-stack engineer for a handful of companies, and the stuff I've put out on my own has been used by 10,000+ people all in. At Simple I ran a full replatform of their core service and built new products from scratch; at Mercari's FinTech arm, Mercoin, I worked as a PdM on new currency launches. Design, front-end, product — I can take a thing the whole way on my own. That's kind of my whole deal.
These days I'm COO at QueryLift, a company I started with a friend, building an LLM-powered analytics tool for the GEO era — making sure brands worth knowing actually show up when generative AI does the searching. The throughline for me has always been the same: there's no limit on being useful with tech, and the goal's to build things that quietly change what people take for granted. Off the clock, it's all music — I DJ at clubs and make videos. Same instinct, different medium: figure out how it works, then make something people feel.
Why I love making things
Give me a laptop and I can turn most of what's in my head into something real — and honestly, that's been the engine behind everything since I was a kid. Engineering just happens to be the medium that carries the act of making the furthest: write a little code, and a world exactly as you pictured it stands up on the screen, ready for someone else to walk into. I'm not the fastest in the room, and I'm not the flashiest. What I do have is a kind of stubbornness — I tend to stay with a problem long after most people have set it down, turning it over and over until it finally gives. Curiosity, mostly. I just really want to know how things work.
That same itch spills over into the rest of my life. Cameras, video, the late nights I spend DJing in clubs — on paper they look like a different person's hobbies, but the wiring underneath is identical: figure out how a thing actually ticks, then build something a real person can feel. What I care about in the end isn't the technology itself; it's whoever's on the other side of it, and whether the thing I made quietly earned a place in their day. I'd take making one piece of work that genuinely moves somebody over ten that merely function. That, more than any stack or title, is the part of me I'd want you to know.
Where I've been working.
- 2026.05 — Present · TokyoFrontend Engineer / Designer
Noahloy Inc.
At a company driving DX in the shipbuilding industry, leading the frontend replacement, design, design-system development and corporate branding.
- 2025.02 — Present · TokyoDirector / COO (Full-stack · Designer · PdM)
QueryLift Inc.
A startup founded with a friend. Building an LLM-powered analytics tool that helps valuable brands stay correctly visible in the age of GEO (generative engine optimisation). With the mission of "conveying the right information the right way," I work across frontend development, design and product management.
- 2025.03 — 2025.05 · TokyoEngineer / PdM (Intern)
Mercari (Mercoin)
Joined the FinTech division Mercoin as a Product Manager. Owned the full launch flow for a new currency — defining how it was presented to customers, designing and developing the landing page, and shipping the release.
- 2024.07 — 2025.04 · TokyoNew Business Development (Contract)
Media Aid Inc.
Worked on two new business initiatives in parallel, including a new social platform. Handled industry research, competitive analysis, interviews and documentation — my first step from engineering toward the PdM and business side.
- 2023.01 — 2024.08 · TokyoFrontend Engineer (Intern → Full-time)
Simple Inc.
Worked across three main projects. For a full replacement of the core service, I rebuilt a job-change information site from Laravel / Vue.js to TypeScript / Next.js / TailwindCSS / Go / AWS, owning everything from Figma design to implementation. For a new product, I developed a mobile app aimed at reducing early resignations end to end — requirements, interviews, design and implementation (Figma / React Native). I also customised and optimised the in-house Salesforce / CMS using Apex.
- 2023.12 — Present · TokyoOrganizing Staff
Google Developers Group Tokyo
Helping run a technical community and organise its events.
- 2022.09 — 2023.10 · TokyoFrontend Engineer (Intern)
REGAL CORE Inc.
Renewed the corporate site and maintained / improved the core service. Covered a wide range — requirement gathering, wireframes and design in Figma, coding (JavaScript / React), database management for the in-house service (regex maintenance / Go), and even shooting internal videos (DaVinci Resolve).
- 2022.04 — 2026.03 · TokyoExpected to graduate
Gakushuin University, Faculty of Law
Enrolled drawn by the versatility of combining law and engineering. Recently, out of an interest in FinTech, studying the Payment Services Act, the Financial Instruments and Exchange Act, and civil law.
Things I've shipped on my own.
Reginavi
2023.10A festival app for Gakushuin University that centralises event information and improves the visitor experience.
Next.jsTypeScriptMobile App
Enter
2022.09An engineering community for university students — a platform for exchange, knowledge sharing and events.
CommunityEvent
UFES 2024 — Spring
2024.01 — 2024.04Planned and ran an engineering event for university students, creating a space for technical exchange.
Event
- Next.js · 13 – 15Led Simple's core-service replatform from Laravel/Vue.js to Next.js — my default stack since, at QueryLift, Mercoin and Noahloy.
- React · 17 – 19Front-end daily driver since REGAL CORE — component architecture, hooks and design-system work across every role.
- TypeScript · 4.5 – 5.xStandardised the codebase on TS during the Simple migration; typed end-to-end ever since.
- Tailwind CSS · v3 / v4Built and maintained design systems with it at Simple and Noahloy — tokens through component library.
- Rust · stable (2021 ed.)Performance-sensitive backend and tooling work. [draft — please verify the project]
- Node.js · 18 – 22 LTSAPI and tooling layer behind the front-end apps. [draft — please verify the project]
- Go · 1.21+Built the Simple replatform backend and maintained REGAL CORE's in-house service DB layer in Go.
- AWSHosting and deploy for the Simple replatform — front-end through delivery.
- DockerContainerised local and CI environments across projects. [draft — please verify]
- Terraform · 1.xInfrastructure-as-code for cloud provisioning. [draft — please verify]
- CI/CD · GitHub ActionsBuild, test and deploy pipelines. [draft — please verify]
- PostgreSQL · 14 – 16Primary relational store for production apps. [draft — please verify]
- MongoDB · 6.xDocument store for flexible-schema features. [draft — please verify]
- Redis · 7.xCaching and session layer. [draft — please verify]
- GitVersion control and team workflow on every project.
- FigmaDesign-to-implementation handoff I own end to end — from Simple to Mercoin's LP to Noahloy's design system.
- React Native · 0.7xBuilt Simple's early-resignation-reduction mobile app end to end — requirements, interviews, design and implementation.
- Google Analytics · GA4Measurement for QueryLift's GEO analytics and the Mercoin launch LP. [draft — please verify]
- Search ConsoleSearch-visibility monitoring, central to QueryLift's GEO work. [draft — please verify]
- Tag ManagerTag and event management for analytics across launches. [draft — please verify]
- DaVinci Resolve · 18 / 19Shot and edited REGAL CORE's internal videos; also my off-the-clock video work.
- 01Shipped several personal web services (10,000+ users in total).
- 02Technical support for multiple companies through full-stack work.
- 03Operating as an FDE (Forward Deployed Engineer) — embedding with customers to turn problems into shipped solutions.
- 04A distinct perspective from balancing law and engineering.
- 05Hands-on management and business-development experience at a startup.
v1.0Table of Contents.
1. Engineering
2. AI and FinTech
3. Design and Craft
Common Questions.
Product work and design-engineering roles where I can own a thing end to end — from the problem and the design through to shipped code.
I'm most useful where front-end, design and product overlap, especially in AI or FinTech contexts. Small, ambitious teams suit me best.
Let's make something.
Open to product work, design-engineering roles and the occasional small, strange project. The fastest way to reach me is email.