About Yaduraj Singh

Yaduraj Singh is a 20-year-old full-stack engineer · ai/ml builder based in Dehradun · Greater Noida, India. He builds and operates production software end to end — from firmware running on microcontrollers to multi-tenant SaaS platforms serving real users — and runs the infrastructure underneath it himself.

What that means in practice

• Self-hosted Linux infrastructure — Nginx, SSL, PM2, systemd. Not just Vercel deploys.
• Manual WebRTC: full ICE/STUN/TURN + signalling layer. No third-party video SDK.
• Designed multi-tenancy, RBAC, caching, CI/CD for a hospital SaaS — solo, from a blank repo.
• Three live production applications with real users before age 21.
• Hackathon-winning hardware + AI system: ESP32-S3 + FastAPI + Flutter, team of two.
• AI/ML pipelines: handwriting synthesis, voice + LLM + TTS cognitive OS, wearable vitals monitoring.

Track record

• 2,000+ users in production
• 08 shipped projects
• 03 hackathons won
• 04 self-hosted servers

Experience

Lead Software Developer — Intern — Gautam Buddha University

2024 · 6 months

• Sole architect of a ground-up institutional ERP — ER diagrams, API contracts, to production deployment.
• Modules: student lifecycle, automated attendance, fee ledger, timetable engine, faculty/admin portals.
• Eliminated 100% paper workflows. ~60% admin overhead reduction.

Stack: Node.js, Express, JWT RBAC, React

Currently building

Tollgate (private beta) — Cost & usage observability for LLM APIs. Reverse proxy for OpenAI, Anthropic, and OpenAI-compatible providers — one base URL for per-feature cost, exact-match caching, budgets, and runaway-agent alerts.

Selected work

• Aarogya Setu — Multi-tenant hospital SaaS — OPD/IPD queues, EMR, appointments, billing, pharmacy, diagnostics. 6-tier RBAC. _(Next.js 14, TypeScript, Prisma, PostgreSQL, Redis, Docker)_
• MuhDikhai — Omegle-style anonymous video chat. Full WebRTC peer lifecycle built manually over Socket.io. Sub-2s pairing. _(Node.js, TypeScript, WebRTC, Socket.io, PostgreSQL)_
• CineVerse — Social film tracking — watchlists, ratings, reviews, discovery feeds. TMDB API across 500k+ titles. _(Next.js, Firebase, TMDB API, Nginx, PM2)_
• SecondMind / CortX — Cognitive OS on ESP32-S3 Sense. Voice → faster-whisper → local LLM → Coqui TTS. VAD firmware, Opus compression. _(ESP32-S3, FastAPI, Flutter, Neo4j, Qdrant)_
• GBU Timetable — Official iOS app for GBU students. Live home-screen widgets via WidgetKit. Real-time schedule updates. _(SwiftUI, Combine, WidgetKit)_
• Maakosh — Maternal & neonatal health iOS app. Wearable sensor integration (MAX30100, EMG) for real-time vitals. Role-based. _(Swift, Firebase, ThingSpeak)_
• Bolonyay — Multilingual legal aid iOS app — petitioners with regional advocates. Voice-assisted forms, automated PDF reports. _(Swift, Firestore, PDFKit, STT)_

Get in touch

Email yadurajsingham@gmail.com, or see the contact page for every channel. Machine-readable versions of everything on this page are available from the public API.