A computer-implemented method for building a software application is disclosed. The method includes: generating a plurality of application resources; creating a plurality of tags; applying one of the tags on each of the plurality of application resources; grouping the application resources by their tags to form at least two asset packs, each identifiable by at least one tag shared by all application resources in the asset pack; and creating an asset pack manifest comprising a location of each of the asset packs and an order in which the asset packs are to be downloaded.