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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May 24
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HFS+ also has a few specific optimizations. When a file is opened on an HFS+ volume, the following conditions are tested:

— The file is less than 20 MB in size
— The file is not already busy
— The file is not read only
— The file is fragmented (the eighth extent descriptor in its extend record has a non-zero block count)
— The system uptime is at least 3 minutes

If all the above are satisfied, the file is relocated (de-fragmented) - on-the-fly.

 What Is Mac OS X?, Mac OS X Filesystems (Amit Singh)