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.

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October 19
How Clang blocks are implemented

“If you’re familiar with how Objective-C objects are declared […] blocks are Objective-C objects. This may not seem strange in Objective-C but the reality is that even in pure C or C++, blocks are still Objective-C objects and the runtime support for blocks handles the retain/release/copy behaviors for the block in an Objective-C messaging manner.”

by Matt Gallagher