hi there. i'm the management behind btcd, an alternative full node bitcoin implementation, and i can say that it is very unlikely the original code is the product of a single person. additionally, the amount of work that must have gone into testing and setting the myriad constants for bitcoin is huge, far more than a single person is capable of in a few-year period.

i won't share all the magic but consider this: have you noticed how there are big and little endian flips littered throughout the code, especially in the script code? do you think that a single dev would just arbitrarily assign endianness throughout the code, then have the script code be big endian?