Engineers practice here to land roles at Google, Meta, and Amazon. Companies screen here because the signal is real.
Real voice conversation. Live whiteboard. Adaptive AI that probes like your toughest interviewer. Honest feedback in seconds.
Free forever · No credit card · 3 sessions/month on the free plan
See It In Action
See how DesignLoop conducts a real system design interview — voice conversation, live whiteboard, and honest AI feedback in seconds.
"Design a URL shortening service like bit.ly. Walk me through your architecture, starting with the core write path."
"I'd start with a simple REST API — POST /shorten returns a short code, GET /:code redirects. We need a key generation service to avoid collisions..."
The Vision
The engineers who use DesignLoop to prepare are the same engineers your team wants to interview. We're building the infrastructure layer for technical hiring at scale.
Engineers use DesignLoop to prepare — real problems, real AI interviews, honest scoring. They get better, they get hired.
Engineering teams invite candidates through DesignLoop. Same platform, same rubric — just the other side of the interview.
Candidates who trained on DesignLoop arrive better prepared. Screeners get a stronger signal. Both sides win.
What People Say
I went from consistently failing L5 panels to landing an offer at Google in 6 weeks. The feedback after each session was brutally honest in the best way.
Software Engineer, L5
Used DesignLoop to prep
I reviewed three candidates before my morning standup. None of them needed to schedule with an engineer.
Engineering Recruiter
Series B · 200+ eng
The seniority assessment matched exactly what our panel concluded after a 4-hour on-site. The signal is real.
VP of Engineering
Enterprise SaaS team
Whether you're an engineer prepping for your next system design loop, or a team that needs to screen candidates at scale — DesignLoop is ready.
For Engineers
No credit card required. 3 sessions/month on the free plan. Get honest AI feedback in seconds.
Already have an account? Sign in →