Freelance Firebase Developer

We are a startup team looking for a single freelance backend developer who is skilled in Firebase, specifically Firestore, Firestore APIs and calls optimization/scalability. The work would be various tasks to continue to develop the backend and algorithms, of our existing web application. We use angular as a front end and typescript language. Please don't apply on behalf of an existing team/company, we are looking for a single INDIVIDUAL FREELANCER to help our existing team.