Jay Stewart

Work

Two systems, written up properly.

Not a list of projects. Each of these explains the problem, the constraints that shaped the architecture, what the trade-offs actually cost, and where it currently falls short.

In production2026 — present

AgendaProfe

Scheduling, payments and live video teaching for independent language teachers, running in production in Mexico.

Database models
74
API routes
269
  • Next.js
  • React Native
  • Postgres
  • Stripe
  • +3

Read the case study

Running, pre-launch2026 — present

Live positions for an unmapped bus network

Inferring where buses are from anonymous rider signals, on a network with no vehicle tracking, no published timetable and no operator data feed.

Commits
1,404
Test files
148
  • React Native
  • Next.js
  • Postgres
  • Fly.io
  • +2

Read the case study