I have been teaching English and Business English since arriving in Poland in 2011. Since then, I have gotten a masters degree and a pedagogy certificate, which has allow me to teach a self-created curriculum at a public school in Warsaw that is based on students interests.
I have a very humanities-based background and so it is very easy for me to find something interesting in everything. If you want lessons focusing on finance vocabulary -- that's what you will get. Maybe you prefer to learn technical English, again, I'd here to help you. Thankfully, I've not had a student whose interests didn't resonate with something I found interesting.