Not these days. IT salaries are out of control in Poland, and that's the kind of offer made to a mundane senior engineer in something that everyone has (like Java). Anything specialist and in demand and you can add at least 50% to that.
But no idea about software so wait for someone who does know.
netguru.co/career - worth having a look here to see what the going rates currently are. Salaries are going through the roof because there's so much demand, and Poland can't process visas fast enough for non-EU citizens to work here.