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I build reliable backend systems and cloud platforms that scale — from validation pipelines to real-time SaaS products.
01 · About
I'm the kind of engineer who can't just use something — I have to know how it works. Backend systems, Linux internals, Kubernetes scheduling, the whole architecture under the hood. Building things that scale is the hobby that pays.
At E2E Networks I put that curiosity to work — catching stuck cloud operations early, automating tests, and shipping connectors.
Off-duty I'm self-hosting VPNs, building side projects end-to-end, and grinding LeetCode.
Stack
TypeScript · Python · Go · Java · Node.js · Django · Flask · PostgreSQL · Redis · Kafka · Docker · Kubernetes · AWS · LLMs
JC Bose University of Science and Technology (YMCA), Faridabad
Bachelor of Technology in Computer Engineering · 2021 — 2025
CGPA 8.45/10
02 · Experience
E2E Networks · Delhi, India
E2E Networks · Delhi, India
03 · Projects
QR Restaurant Ordering SaaS
Multi-tenant SaaS that replaces manual order-taking with a fully digital QR flow — menu browsing, ordering, and payment end-to-end. Real-time kitchen broadcasts over Socket.io with per-tenant isolation, Groq LLaMA vision models that auto-extract menus from images/PDFs, and a full Razorpay subscription billing lifecycle.
Self-hosted Private Network
Full-tunnel WireGuard VPN on a free-tier AWS EC2 instance with keypair auth and a locked-down security group. Private 10.0.0.0/24 network with iptables NAT/MASQUERADE, QR-code device onboarding in under a minute, and hot-reload peer management with zero client disconnects.
Telegram bot that fetches & roasts college results
A Telegram bot that logs into the university portal with a Puppeteer cluster, fetches semester results on demand, and roasts them mercilessly with a Groq LLM. Session cookies are cached in Redis for instant repeat lookups; fully containerized with Docker.
Real-time weather & 7-day forecast
A vanilla JavaScript weather app that shows real-time conditions for any city — temperature, AQI, humidity, visibility, wind, UV index, sunrise/sunset — plus a 7-day forecast, fetched asynchronously from a third-party weather API.
More in the archive → github.com/rajsinghast03
04 · Skills
Drag to rotate
TypeScript · JavaScript · Python · C · C++ · Go · Java
Node.js · Django · Flask · Express · Socket.io · REST APIs · Celery
PostgreSQL · NeonDB · MongoDB · Redis · Kafka · RabbitMQ · Drizzle ORM · Prisma
Kubernetes · Docker · AWS · Cloudflare Workers · MinIO (S3)
LLMs · Groq · Vision Models · RAG
Git · GitHub · Linux Commands · Claude Code · OpenCode
05 · Contact
My inbox is always open — whether you have an opportunity, a question about backend systems, or just want to talk distributed systems over chai. I'll do my best to respond at light speed.