1. A computer-implemented method comprising: receiving a specification of a statically typed first interface to a first function, the first interface including a specification of a data type of a parameter of the first function; analyzing the specification of the statically typed first interface to the first function to determine a function signature; determining, based on the analyzing, the function signature; identifying a second function using the function signature, the second function corresponding to the specification of the statically typed first interface to the first function, the second function written using a dynamically typed language; and generating an implementation of the first function that invokes the second function through a dynamically typed function specification associated with the second function.