Deep Saros is one of those countless engine variants forked from the first wave of open source engines era. The experience tells it's not a tasteful discussion to dig down deep about who, when and how developed the code. So let's just keep in mind Deep Saros is among the strongest engines around,.
Especially on Android, DS is the leading single core engine so far, even though its SMP feature is present but fails to function. Imagine how better it could perform with 4 cores!
For those interested in some more ELOs, Deep Saros arm7 is HERE.