Tanaka Mafico

Hey everyone

A couple of months ago i was in a sticky situation. I am a fullstack dev with 4 YOE at amazon. I recently figured out that my communication during interviews sucked despite having solved over 500 leetcode problems. Finding solid mock interview partners at odd hours was a hassle, and standard platforms only test your code, not how you talk through it.
So my friend and I spent the last few months building a tool to solve this exact gap: Devana. It s built for practicing realistic mocks with an AI interviewer so you can refine your communication before doing the real thing.
Here is what we built into it:
Interactive AI Mocks: Practice talking through your approach, edge cases, and time complexity out loud with an AI before/while writing code.
Paste Any Custom Problem: Found a tricky LeetCode problem or company-specific tagged question? You can paste in your own coding problems and have the AI run a mock session on them.
Detailed Progress & Communication Feedback: Deep breakdowns after every session on where your code, logic, or verbal explanations dropped.
Huge Problem Bank: 1000s of built-in DSA questions ready to go.
Why build this over using existing stuff? Platforms like Pramp or interviewing .io require matching schedules, dealing with awkward ghosting, or paying huge fees. Grinding LeetCode alone doesn't train your talking skills. Devana gives you on demand, zero judgment mock practice 24/7, with full freedom to test yourself on any problem you want. If anyone is interested, check it out at Devana .