Yash User

I’m building LLM-driven products like my AI UI generation & synthetic user testing SaaS, Bender, using Next.js 16 App Router with SSR/RSC and deploying on Vercel. I constrained the LLM pipeline (Vercel AI SDK with Claude/Gemini/OpenRouter) to emit only Zod-validated structured output, so UI assembly and schema enforcement stay owned by the app.

On Bender, I also engineered a synthetic user testing engine with headless browser automation (Puppeteer on serverless Chromium) to walk generated interfaces and capture UX friction telemetry. I wired event-driven background jobs with Inngest (durable execution, retries, real-time progress via WebSockets), plus Clerk auth, Polar billing with webhook reconciliation, Upstash Redis rate limiting, and Sentry.

Alongside that, I built STEPWISE, an interactive DSA visualizer with an AI tutor, where the model only selects steps via tool calls and the React app remains the single source of truth for rendering from instrumented algorithm code—so visualization can’t drift. I’ve also shipped hackathon work like YaadKar, including on-device face recognition that never leaves the device and multilingual spoken prompts grounded in caregiver profiles stored in Firebase.