Well that's a flawed question, as no one ever designed instagram, it evolved through iteration to its current state. If you tried to clone instagram now, it wo

Well that's a flawed question, as no one ever designed instagram, it evolved through iteration to its current state. If you tried to clone instagram now, it would take years to replicate every feature (for a single dev). A better answer is to say you would design instagram the way they originally did.... Start with a simple photo sharing platform and add features based on user feedback and demand. That way you're solving problems people are having, not copying a solution that already exists.