# Engine

### Engine is an open-source, backend server that reads, writes, and deploys contracts at production scale.

### Why use Engine?

Engine enables your app to:

* Send multiple blockchain transactions at once.
* Resubmit stuck transactions, handling nonce values, gas settings, and RPC errors.
* Avoid duplicate transactions.
* Manage multiple backend wallets and their funds.
* Control access from your backends and team members.
* Sponsor user gas fees.
* Deploy and interact with smart accounts.
* Subscribe to contract events and transactions.

{% embed url="<https://portal.thirdweb.com/engine>" %}