Work / Advice on finding an Engineering job in Warsaw, Poland [3]

I am from south korea. I want to find a job in warsaw poland. because my girl friend is a polish lives in warsaw. but it is not so easy to find proper job to me.

I work as a CFD (Computational Fluid Dynamics) simulation engineer in seoul korea for 4 years . Headquarter of my company is NY , US. and London, UK. that develope and service CFD software for clients.

I have experienced automotive, electric home appliances and heavy industries.
Which website is good for searching engineering jobs? and how about the salary of that kind of jobs?
I hold master degree in mechanical engineering, and course work finished in doctor degree course at Graduate school in south korea.
I hope to hear your advices and recommendations.
Thanks all.