
Full-stack · Multi-tenant · Mobile-first
Ironed Out
Organizes golf outings. The organizer books a few tee times, drops one link in the group chat, and friends claim spots from their phones with a texted code. No account needed.
- Race-safe claiming with row locks and unique constraints, so two friends can never get the same spot
- Postgres Row-Level Security per tenant, built API-first for booking platforms to plug into later
- A "Since you last looked" change feed driven by an append-only event log
- Argon2id accounts, hashed one-time codes, signed device cookies, and generated link-preview images

