I believe in some companies, when you first join and they don't yet know how well you will do, your title is "member of technical staff" Then after a specific

I believe in some companies, when you first join and they don't yet know how well you will do, your title is "member of technical staff" Then after a specific period (e.g. 6 months), after the first performance review cycle, your level gets decided, and you become a "software engineer"