1. A Voice over Internet Protocol (VoIP) system providing a VoIP or other telecommunications service platform, the system comprising: a VoIP server that includes: call-routing logic circuitry configured to provide VoIP or other telecommunications communications by providing call extensions for a plurality of customer accounts supported by the VoIP service platform routing calls for the provided call extensions; and a call control engine including circuitry configured to control calls routed by the VoIP server by: for each of the customer accounts, receiving telephone calls made to the customer account; parsing, in response to the telephone calls, a respective set of one or more call processing instructions associated with the customer account that are written in a programming language that includes call flow commands for the call routing logic circuitry; querying, based upon the parsing of the one or more call processing instructions, a customer server that provides call routing instructions for the telephone calls, wherein the query provides the call routing instructions without providing direct access to customer data stored on the customer server; processing conditional statements responsive to the call routing instructions; generating, in response to the conditional statements and associated call flow commands written in the programming language, routing instructions not included in the call processing instructions for controlling the received calls via the call routing logic; and wherein the call routing logic circuitry is further configured and arranged to route the received calls using the routing instructions.