Hire a Firebase developer without the freelancer hunt

Firebase makes the first version of an app fast to build, and the second version harder than expected. The usual trouble spots: security rules left in test mode or so strict that the app breaks, a Firestore structure that needs ten reads to draw one screen, Auth flows that don't link accounts properly, and Cloud Functions that time out or run twice. The agent works on all of these.

Security rules come first, because a database open to anyone with your project ID is one of the most common serious Firebase mistakes. The agent writes rules that match your data model — users read and write only their own documents, admins checked by custom claims, fields validated on write — and tests them with the Firebase Emulator Suite so every allowed and denied case is proven, not assumed.

Costs are the other surprise. Firestore bills per document read, so a listener on a large collection or a page that re-fetches on every render can turn a small app into a large invoice. The agent reviews usage in the console, restructures hot queries, adds pagination and caching, and sets budget alerts so the next spike is caught early rather than discovered at month-end.