Disclosed are apparatus and methods for processing configuration data sets. A computing device can retrieve configuration data set(s) from data storage. A configuration data set can include key-value pairs related to configuring a software application, where a key-value pair can include a key name and an associated value. The computing device can merge the configuration data set(s) into a merged configuration data set by at least: determining whether multiple key-value pairs of the configuration data set(s) are in conflict; after determining that multiple key-value pairs of the configuration data set(s) are in conflict, determining a representative key-value pair to represent the multiple key-value pairs; and adding the representative key-value pair to the merged configuration data set. The computing device can provide the merged configuration data set to the software application.