Built Cognisia — an AI powered practice tool for system design interviews

Hey Indie Hackers 👋

I just launched Cognisia (https://cognisia.app), a system design interview practice tool focused on how you explain your thinking, not just what you know.

Most prep today is reading blogs or watching videos, but interviews evaluate clarity, structure, and trade-offs under pressure. Cognisia lets you:

• practice answering real system design questions out loud

• get structured AI feedback on clarity, structure, and reasoning

• follow guided learning paths to know what to study next

It’s live in beta right now and still evolving, but I wanted to share it with this community as I start collecting early feedback and usage patterns.

Would love thoughts from folks who’ve been through system design interviews:

• Does spoken practice resonate?

• What would make something like this part of your regular prep?

Happy to answer any questions.