Firebase hosted project (GCP) with NextJS enhancements — 5

I am looking for a NextJS expert who can help me with enhancing my Firebase hosted project on GCP. I have already set up the Firebase project, but I need help with specific features and functionalities such as authentication and authorization, SEO optimization, and performance optimization. I am expecting the project to be completed in less than a week. Ideal skills and experience for this job include expertise in NextJS, Firebase, GCP, authentication and authorization, SEO optimization, and performance optimization.