Solo dev preps driver-safety app for 10-20x user surge after landing big client
A solo (or small-team) developer built a two-sided vehicle safety checklist app for the road transport industry, relying heavily on AI (Claude) during development. Drivers fill out pre-trip and in-trip inspection checklists from their phone, and the app works offline, queuing entries locally and syncing automatically once back online.
The transport company watches everything live from a web dashboard, including in-progress trips and completed inspections, and can generate PDF certificates for compliance and audit purposes. The stack is a React 19 with TypeScript in strict mode, backed by a serverless Postgres that provides , row-level-security-enforced , realtime , , and .
PDF certificates are generated client-side. The app has so far only been validated with a modest user base, but a new contract with a large client is about to onboard roughly 1,000 drivers almost overnight, prompting the developer to ask what to stress-test before go-live.
Key points
- Two-sided app: offline-capable mobile checklist for drivers plus a realtime web dashboard for the transport company
- Built with React 19 + strict TypeScript on a serverless Postgres (auth, , realtime, storage, )
- Offline-first sync: entries queue locally and retry automatically on reconnect
- A new contract will onboard roughly 1,000 drivers almost overnight
- Only validated with a small user base so far, prompting a request for pre-launch stress-test advice