FlipSmart
FlipSmart tells Old School RuneScape players which items to buy and resell on the game's Grand Exchange market. Its picks show up in the game through a RuneLite plugin and on the web.
FlipSmart's public market overview, captured Sept 29, 2026.
Its lead engineer built most of the product, including the market overview above. I set up its deploys, CI, sign-in and first web app in 2025.
In 2026 I built its subscriptions and took billing live, with an email when a card fails and a switch that stops new charges right away. Ten days later I fixed how cancellation dates synced from Stripe. When growth started to cost money, I cut the load on its Redis cache and moved the cache to a server FlipSmart runs itself.
Milestones Stripe billing
Stack
- Languages
- JavaTypeScriptPython
- Payments
- Stripe