Software engineer · Founder · Patna, India

Yuvraj Singha.k.a. Yuv

I build systems that talk to each other, from packets to pixels. Founder of Rayavriti (opens in a new tab), final-year CSE, Free & Open Source at heart.

See the work Say hello
01

Logician. Introvert. Builder.

Portrait of Yuvraj Singh
Yuvraj Singh · “Yuv” · Patna, IN

Aspiring Computer Scientist. Final year undergraduate student in Computer Science and Engineering, passionate about exploring the frontiers of technology. As a logician and introvert, I enjoy delving into complex problems and finding innovative solutions.

· in his own words, LinkedIn
Based in
Patna, Bihar, India
Studying
B.Tech Computer Science & Engineering, final year (’26)
Building
Rayavriti (opens in a new tab): IT networking & training
Believes in
Free & Open Source software
Fun fact
“I am a boring person.” His README says so. This website respectfully disagrees.

Right now

  1. Founder @ Rayavriti (opens in a new tab)

    “A one stop IT Networking & Training Solution.” Networking, hiring, internships and training under one roof.

    Jan 2026 — now

  2. Builds the tech platform @ Udaymarg Integrated Multitech Pvt. Ltd.

    Builds Udaymarg’s tech platform for this Bihar company: the jobs & internships portal, the LMS and the website.

    Ongoing

  3. TPO Coordinator @ His college

    TPO Coordinator at his college, alongside a final-year B.Tech in Computer Science & Engineering (class of 2026).

    Ongoing

02

Selected work

Networks, money, careers, classrooms and kitchens. Things built for real people in Bihar and beyond, plus the open-source tools behind them.

Featured · Real-time network monitoring

Rayavriti NetMonitor

A full-stack, real-time network monitoring platform for local infrastructure. A PRTG-style alternative for colleges, offices, hostels and labs, with no per-device licensing.

  • ICMP / HTTP / TCP / SNMP v1–v3 monitoring
  • NetFlow v5/v9 & sFlow analysis: top talkers, Sankey, treemaps
  • Live packet capture
  • AI health scoring & z-score anomaly detection
  • Live WebSocket dashboard
  • Go
  • TypeScript
  • WebSockets
  • SNMP
  • NetFlow
Source (opens in a new tab)Public

More builds

GST billing & accounting

HariAcc

GST billing and accounting for a real hardware and building-material shop in Bihar. CGST/SGST/IGST invoicing, an udhaar (credit) ledger, double-entry books, GSTR-1 and quarterly exports, bill OCR, Excel import, a Hindi + English UI, an HSN/GST rate assistant cited to CBIC notifications, and A4/80mm printing.

  • Next.js 16
  • React 19
  • Prisma
  • SQLite
  • Docker
  • Coolify
Private client app

Jobs + internships portal

Udaymarg Opportunities

A jobs and internships portal with candidate auth and profiles, applications, an admin console, an LMS track and an Expo mobile app.

  • Next.js
  • TypeScript
  • Expo
Live (opens in a new tab)Private repo

AI cinematic learning

Lumina

An AI learning app that turns any topic into a narrated, cinematic visual story: Gemini 2.5 scripts, Imagen 4.0 visuals, Gemini TTS and a custom player.

  • React 19
  • Vite
  • Gemini
  • Imagen
Live (opens in a new tab)

Search-first knowledge base

Institutional Knowledge Platform

A search-first document and knowledge platform for colleges. Monorepo with a Next.js web app, a Fastify API, a background worker and Zod-validated config.

  • Next.js
  • Fastify
  • Workers
  • Zod
Source (opens in a new tab)

Friction-less dine-in

Qrave

QR menus, live order tracking, a restaurant admin dashboard and printable invoices.

  • Full-stack
  • Realtime
  • QR
Source (opens in a new tab)

Honest feedback, safely

Anonymous Feedback System

Token-based anonymous student feedback with analytics and exports.

  • Python
  • Analytics
Source (opens in a new tab)

Open-source contributor

AgenticGoKit

Contributes to AgenticGoKit, an agentic-AI framework in Go, and to its agk CLI.

  • Go
  • Agents
  • CLI
  • FOSS
Docs (opens in a new tab)Open source
03

32 tools. One orbit.

Languages11

  • C
  • C++
  • Java
  • Python
  • Go
  • Lua
  • Bash
  • JavaScript
  • TypeScript
  • HTML
  • CSS

Frontend5

  • React
  • React Native
  • Next.js
  • Tailwind
  • Vite

Backend6

  • Node.js
  • Express
  • Django
  • FastAPI
  • Socket.io
  • Prisma

Data3

  • PostgreSQL
  • SQLite
  • Redis

Infra5

  • Linux
  • Docker
  • Nginx
  • GitHub Actions
  • Git

Design2

  • Figma
  • Canva
04

How I ship

Self-hosted, end to end. A VPS running Coolify, Docker and Traefik, machines stitched together over Tailscale, and AI coding agents orchestrated from Telegram.

  1. 01

    Telegram

    Tasks start as a message.

  2. 02

    AI agents

    Coding agents, orchestrated from chat.

  3. 03

    GitHub

    Every change lands as a commit.

  4. 04

    Coolify

    Builds & deploys on his own VPS.

  5. 05

    Docker

    Everything ships as a container.

  6. 06

    Traefik

    Routing and TLS at the edge.

Private mesh: Tailscale ties the VPS and his machines together.

05

Bring me a hard problem.

Building something, hiring, or just want to talk Linux, networks or FOSS? The inbox is open.

yuvrajs2004@outlook.com