Case studies from the evenings and from the day job: what each one does, what broke, and how it was fixed.
ten job sources, one inbox
A job-hunt tracker that does the boring part: reads ten public job sources on a schedule, scores every posting against your criteria, and reminds you exactly once when an application goes quiet.
nestjs · prisma · postgres · redis · bullmq · next.js 16 · live demo ↗
read the case study →live in production
A private, two-person map of where we've been and where we want to go. Pins move from dream to memory.
next.js 15 · supabase · mapbox gl · cloudinary · live demo ↗
read the case study →
five evenings
A realtime marketplace for buying and selling small businesses — live offers over websockets, a market simulator keeping it moving.
nestjs · mongodb · redis · socket.io · live demo ↗
read the case study →Full-time since July 2024, on client work under NDA: no product names, no screenshots. What I can show is the shape of each engagement and its numbers.
research & development engineer
jul 2024 – present
one engagement · a 460‑screen japanese property platform · 60+ engineer bilingual en/jp team
A cross-platform mobile app for on-device image recognition, React Native and a TensorFlow Lite model trained in Python, built for a research paper (2023–2024).
A NestJS endpoint monitor, built in 2025 and rebuilt in 2026: a cron scheduler pings endpoints, persists to MongoDB and broadcasts to a live dashboard over Socket.IO, with Redis cache-aside and an atomic INCR/EXPIRE rate limiter. The Jest suite enforces a coverage threshold, and one of its failure-path tests caught a real outage-handling bug before release. A companion to ScoutBoard.
Next.js 15, MDX, no component library. Source on GitHub.