I finished my Ph.D. research in computer science a few months ago and started writing my dissertation. Meanwhile, I applied for a postdoc position before my Ph.D. fund could run out. So, I found and started a postdoc position around a month ago in another University in Germany, and I'm going to have my disputation in 3-4 months from now (that's the usual waiting period in CS in Germany).
However, I'm not sure what title I should use regarding my position in the new institute until I do my Ph.D. disputation, especially in email correspondences and when I introduce myself or other similar situations?
Of course, I do not use the "Dr." title until I do the disputation, but should I declare myself still as a "Ph.D. researcher" or a "Post-doctoral researcher" or something else regarding my position here?
BTW, my contract just says a research employee.