Aspects of the disclosure relate to conducting software testing using dynamically masked data. In some embodiments, a computing platform may receive, from a developer computing platform, a test execution request that includes a test code for execution. Subsequently, the computing platform may establish a secure connection to an enterprise data storage database. Upon establishing the secure connection, the computing platform may request confidential data from the enterprise data storage database in connection the test execution request. Thereafter, the computing platform mat execute the test code, which may include receiving encrypted confidential data from the enterprise data storage, decrypting the confidential data, and plugging the confidential data into the test code. Upon completing execution of the test code, the computing platform may delete the confidential data from the computing platform, terminate the secure connection to the enterprise data storage database, and send test code output results to the developer computing platform.