Shoha Tsuchida

A CRM for your job search. Drag-and-drop cards track every application alongside contacts, notes, dates, documents, salaries and company data — no more spreadsheet sprawl.

• Optimized reordering with lexicographical ordering, minimizing database writes on every sequence update.
• Async modal CRUD so updates never block or degrade the interface.
• Chrome extension hooks sync job listings into the tracker in real time.

A ride-share platform for ski and snowboard trips. Drivers heading to a resort post their trip; riders browse and request a seat. The system handles matching, payments and coordination end to end.

• ~28k lines across a monorepo — 14 Compose screens on Android, 17 modules on the NestJS backend.
• A 1,343-line OpenAPI spec is the source of truth for every client–server contract, so the two halves cannot drift.
• Geospatial matching on Postgres + PostGIS drives radius search, route plotting and pickup optimization.
• Stripe Connect for driver payouts, Auth0 for identity verification, Google Maps for navigation handoff.
• 63 test files and GitHub Actions CI on both the Android and backend halves, with architecture decision records checked into the repo.

Music discovery with a swipe. A MERN app on top of Spotify's API that borrows the short-attention-span mechanic from dating apps to help people find new artists.

• Cut network calls by a factor of 3 by caching client data in application state.
• Iterated on features after beta testing with 100+ users recruited through social media.

A gamified chore tracker for iOS 17+. Household tasks become quests with experience points, levels and streaks — and the house itself has a health meter that decays if you ignore it.

• An EXP engine scoring effort × rarity with on-time and streak bonuses, a derived level curve, and a decaying Home Health meter — all pure, unit-testable logic.
• Variable-ratio rewards: roughly an 18% chance of a lucky drop — bonus EXP, a double, a jackpot, or a streak freeze — on any completion.
• NFC tags — stick one on the dishwasher and tap your phone to log the chore through a deep link.
• Home Screen and Lock Screen widgets via WidgetKit, plus local notifications for morning digests, overdue nudges and streak-at-risk warnings.
• Stats built on Swift Charts, and seven achievement badges with unlock celebrations.

Automated price-drop alerts. A Flask backend runs scheduled scrapes against Amazon product pages and notifies you the moment something you're watching gets cheaper.

• Scheduled scraping jobs extract pricing and availability, charted over time so users can see historical price trends.
• JWT authentication securing every backend endpoint.
• React + TypeScript frontend with cache invalidation strategies to avoid unnecessary network requests.
• Structured logging of every notification — timestamps, recipient, and the nature of the price change — for accountability and troubleshooting.

An interactive learning platform with hands-on modules in Python, JavaScript, HTML and CSS — built out of two years of teaching people to code and watching where they get stuck.

• Executes real, language-specific commands inside sandboxed environments to keep untrusted student code away from the server.
• Individualized user profiles tracking progress through each learning module.