Full-stack Engineer
From the frontend to the backend and the infrastructure, I build one product end to end.
Since July 2025, I have been working as an MX Manager at Soundmind. On a single child safety product, I built all four layers myself, from the Android native code on the device to the collection server, the parent app, and zero-downtime deployment.
The problem I wrestled with longest was not losing location data on devices where a management policy keeps mobile data off and logs cannot be read. After funneling data opening and release through a single gateway and correcting for the power-saving timer delays I measured in the field, the transmission success rate reached 100%. On the server, I changed the pipeline to drain and store incoming locations atomically and quarantine failures separately, so a single broken record no longer halts the entire load.
In the parent app, I built the logic that interprets noisy coordinates into places stayed and travel routes, eliminating the problem of indoor stays splitting apart and baseless movement guesses appearing on screen.
At WIGTN, a five-person AI development and research crew, we build AI systems that run in real environments. On WIGVO, which performs two-way real-time interpretation over the ordinary phone network, I handled the relay server and deployment infrastructure, recording a median latency of 555 milliseconds on real calls and zero echo loops across 147 calls. The paper was accepted to ACL 2026 System Demonstrations.
With the same team, we released two open-source plugins covering Claude Code's parallel agent orchestration and Codex's Evidence Contract, and took second place at the Snowflake AI & Data Hackathon Korea 2026.
At the company, I have built one product end to end; on the team, I have explored how to put AI into the development process itself. Connecting the two, I want to work on redesigning how development and operations are done, not just using AI as a tool.
Services and areas I have owned at work.
Responsible for the apps, servers, web, and deployment of child safety and education services.
Where I formally studied.
Bootcamp-style curriculum spanning frontend/backend/DB/AI/Docker.
Double major covering Chinese and Japanese language and literature. Earned JLPT N1 by graduation.
Bootcamps and short-form programs outside formal schooling.
Industry collaboration and team projects for hands-on end-to-end product experience.
Verified credentials and external recognition.
Tools and environments I have handled hands-on in real projects.
Cross-stack work shipped at Soundmind Inc. Tap a card to read the full case study.
Soundmind
Architecture · Native implementationAn app that sends location without missing a beat, on managed devices where mobile data is normally switched off.
Soundmind
Frontend design · implementationA map app that presents uncertain location data without overstating it. It shows places stayed, movement paths, and real-time tracking.
Soundmind
Full stack (all areas)A full-stack Next.js service covering the test-taking screens, the grading admin, integration with external speech recognition and synthesis services, and building the training dataset.
WIGTN CREW team work and bootcamp outputs. Sorted to surface hackathon wins and projects where my hands-on contribution was strongest.
WIGTN CREW
Relay server · InfrastructureInterprets regular phone calls in both directions in real time. The receiving side does not need to install an app. I participated as a co-author of a paper accepted to ACL 2026.
WIGTN CREW
Co-development · InfrastructureRunner-up at Snowflake AI & Data Hackathon Korea 2026. The Mac mini we won as a prize now runs as our team's home server.
WIGTN CREW
Backend · Mobile · InfrastructureI run a NestJS and Prisma backend alongside an Expo mobile app in a single repository. Deployed to GCP Cloud Run.
Reach out via Email, GitHub, or LinkedIn. I am currently prioritizing positions at Japanese companies that build their own services.