First person plural or singular pronouns for thesis presentation
Use &quot;we&quot; when referring to something you did as a team, and use &quot;I&quot; when referring to something that you did by yourself. That is what these words are for.
Using &quot;we&quot; and &quot;I&quot; consistently in this way helps to make clear what your contributions were, and this is often exactly what the jury wants to find out during your presentation.  If you choose to not go with the above option you should make it clear in some other way what you did and what others did.
Of course, if there is a clear preference in the culture where you are presenting it is best to follow that preference, but you would probably not be asking the question if that were the case.