[smatija]

The best math book for a software engineer imho is Concrete mathematics by Knuth (of TAOCP fame).

Problems in it are a bit tough to chew through though.

[aristofun]

not for software engineer, but rather an algo geek or a hardcore hacker

For a typical application level developer (even super senior one) this book is way too deep and complex.

[smatija]

Here I believe we disagree a bit about what engineer means.