If you will work as a researcher (you will not be studying at the same time) you do not need recognition or nostrification of your foreign education.
To verify your highest university education before concluding an employment contract, you will need to submit to the Personnel Department the original of your university diploma or its certified copy with an apostille or superlegalization depending on the country in which the diploma was issued.
If the diploma is not in Czech or English, it is necessary to present its officially certified translation.
If you will also study at UCT Prague, you will need nostrification or recognition of your bachelor's or master's degree from a foreign university. How to proceed is described on the website https://www.vscht.cz/arrangements-for-the-recognition