How We Built an Instant AI Security & Code Auditor in Next.js & Convex

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🚀 How We Built an Instant AI Security & Code Auditor in Next.js & Convex

When building security or code auditing tools, speed is everything. Developers won't wait 45 seconds for a bloated PDF report—they want instant feedback on potential bugs, security leaks, or bad practices.

Over the last week, we've been building BugZ AI, a lightweight scanner designed to analyze code repos and security links in under 5 seconds.

Here is a breakdown of our stack and the architecture choices behind keeping real-time scans ultra-fast.

💡 Build in Public Update: We hit 175 total developer visits today on Day 4 of building out in the open!

🛠️ 1. The Tech Stack

Frontend: Next.js 15 (App Router) + Tailwind CSS
Backend & Database: Convex (for real-time reactive updates without manual polling)
Auth: Clerk
Mobile Sync: Capacitor (wrapping web assets into native Android)

⚡ 2. Solving the Speed Bottleneck

The biggest challenge was stream handling. Instead of waiting for the entire LLM response to complete before rendering analysis to the UI, we used Convex's real-time mutations paired with edge streaming.

This lets the user paste a link or snippet and see initial vulnerability checks pop up in real-time within < 20 seconds.

📈 3. What We Learned Building Out in the Open

Keep the UI distraction-free: Developers hate bloated dashboards when a single search bar will do the job.
Real-time > Batch: Showing progress indicators reduces drop-off rates significantly compared to static loader spinners.