Meta Interview

Hi Recruiter gave me option to choose between Fullstack and other role for E5. I couldn’t well understand the difference and chose fullstack one. Which option should I choose infra or product role? Is there any interview difference between the two? Asking for software engineer E5 role. What options are available or should I clarify once again with the recruiter? Are there product and infra these 2 roles available? I work as a backend developer in one of the services in azure. #meta #tech