KodeRyu — Solo Founder & Full-Stack Engineer
Jan 2026 – Present- Built KodeRyu solo end-to-end — an AI voice interviewer that conducts real spoken technical interviews across voice, DSA and system design — on a React 18 / Express / Postgres monorepo (28 Prisma models, 60+ services, a 502-question bank).
- Built a voice engine that holds a natural spoken interview in real time — streaming speech-to-text (Deepgram) into an LLM and back through self-hosted TTS (Kokoro) fast enough to feel like live conversation, recovering when candidates interrupt or go off-script, and giving progressively stronger hints when they're stuck.
- Executes untrusted candidate code in 5 languages (Python, JavaScript, Java, C++, Go) inside a Docker + nsjail sandbox on a BullMQ worker pool, with sub-second cold starts.
- AI grading that matches human expert graders — κ=0.92 agreement on a 13-criterion rubric — regression-tested by simulating 12 distinct candidate types through an automated evaluation harness.
- Shipped the full SaaS solo — Clerk auth, Razorpay tier-gated INR payments, an OWASP Top 10 security pass, DPDP-Act data handling (export + erasure), and PostHog + Sentry + GA4 telemetry.