I have no idea how the "liberal tech company" meme started, but it is clearly not based in fact. Like any big corps, they don't care about red or blue, they care about green and will donate to whoever they think will help their bottom line, right now, Republicans are in power and they tend to favor big business in general, so this makes complete sense.
The upper management will use shareholders money to increase their own power at the expense of employees and shareholders. The Republican party is the one that supports looting public corporations. So that's who they give money to.
