Whatever you know best. The tech stack is irrelevant. Assuming 11m MAU, we can finger wave to 200k peak active users. That's handleable on small hardware even i

Whatever you know best. The tech stack is irrelevant. Assuming 11m MAU, we can finger wave to 200k peak active users. That's handleable on small hardware even if you use express. The hard part is finding 11 million users.