In one embodiment, a method for providing assets from an asset origin to client devices includes receiving, by a computing system, a request to access a frontend asset from a first client device of the client devices. The method includes determining, by the computing system, an asset selection criteria. The method includes modifying, by the computing system through a dynamic function based on the asset selection criteria, a request for the asset origin to select a particular asset from multiple assets that are responsive to the request to access the frontend asset. The method includes causing, by the computing system, the asset origin to provide the particular asset to the first client device by providing the modified request to the asset origin.