Since edge.js is apparently used in production for Azure Functions, it is a robust tool...
Why would somebody do this? Just because it could, and is fun :)
RobBlackwell/LSharp: L Sharp .NET is a powerful Lisp-like scripting language for the .NET Framework
Edge.js (Call Lisp from Node.js)
var edge = require('edge');
var factorial = edge.func('lsharp', function () {/*
(def fact(n)
(if (is n 0) 1 (* n (fact (- n 1)))))
*/});
factorial([5], function (error, result) {
if (error) throw error;
console.log(result);
});