Which are? Genuinely interested why someone would consider taking a huge cut in salary.
Instead of moving now. Why not slash your current expenses to the bone? Save like crazy for a year, then move with a nice bank balance and ease yourself into the country without the stresses of quickly learning the language, making good friends, networking, etc.
Even better, with a healthy bank balance. You could find out what is missing from the tech scene and create a start-up to fill it.