Ask HN: Technical details behind scaling Silk Road? (1 "employee", $200M sales?)

Besides tor, bitcoin, etc, does anyone know what other technologies (langs, frameworks, hosting) Ross Ulbricht used to build and scale Silk Road to an estimated $200M in sales [1]? Did he have help from anyone else? Seems pretty crazy that one person was able to scale a marketplace to that size.

[1] https://www.reuters.com/article/usa-bitcoin-trial-silkroad/corrected-u-s-sharply-reduces-silk-roads-estimated-sales-volume-idUSL1N0UT1PJ20150120