2026

Secure receipt share

Overview

Secure receipt share is a simple way to share receipts with colleagues without dumping sensitive files into random chat threads. The app focuses on controlled sharing: upload a receipt, share access intentionally, and keep the flow lightweight enough that people actually use it.

It was a practical internal-tool style product with auth and a real-time backend from day one.

Key Features

• Upload and share receipts securely
• Authenticated access for colleagues
• Lightweight sharing workflow
• Real-time backend for document state

Tech stack

• Front-end: TanStack Start React Bun
• Backend: Convex
• Auth: Better Auth
• Deployment: Railway

What I learned

• Designing a narrow secure-sharing flow
• Combining Better Auth with TanStack Start and Convex
• Building internal-tool UX that stays out of the way