Oleg Andreev



Software designer with focus on user experience and security.

You may start with my selection of articles on Bitcoin.

Переводы некоторых статей на русский.


Product architect at Chain.

Author of Gitbox version control app.

Author of CoreBitcoin, a Bitcoin toolkit for Objective-C.

Author of BTCRuby, a Bitcoin toolkit for Ruby.

Former lead dev of FunGolf GPS, the best golfer's personal assistant.


I am happy to give you an interview or provide you with a consultation.
I am very interested in innovative ways to secure property and personal interactions: all the way from cryptography to user interfaces. I am not interested in trading, mining or building exchanges.

This blog enlightens people thanks to your generous donations: 1TipsuQ7CSqfQsjA9KU5jarSB1AnrVLLo
February 24

ruby inject mastery

def movie_events_grouped_by_titles_and_theaters
   events = Event.all.inject({}) do |titles, event|
     ((titles[event.title] ||= {})[event.theater] ||= []) << event
     titles
   end
end
(my response to the mail list discussion; in russian)