Building Connect Now: My Take on Real-Time Video Calling

Basant Gautam — Wed, 26 Aug 2026 13:01:28 +0000

A while back I set out to build my own video calling app — Connect Now — mostly because I was curious how apps like Zoom or Google Meet actually manage to send video and audio between two computers with barely any delay. Turns out there's a lot going on under the hood, and building it myself taught me more than any tutorial could have.

The problem I was chasing

Anyone who's been on a laggy video call knows how annoying it is — audio cutting out, video freezing mid-sentence. On top of that, there's the question of keeping people's data safe while all this real-time streaming is happening. So my goal was simple to state, harder to pull off: make something fast, reliable, and secure enough to handle several users at once.

What I built it with

Node.js + Express for the backend
WebRTC to actually move the video/audio between peers
Socket.io to handle the signaling (basically helping two users "find" each other before WebRTC takes over)
MongoDB to store user data
JWT for handling login and authentication

How it actually works

When two users want to connect, a signaling server (built with Node.js and Socket.io) helps them discover each other and exchange the info needed to set up a direct connection. Once that handshake is done, WebRTC takes over and streams video/audio directly between the two devices — no server sitting in the middle relaying every frame, which is what keeps the latency down to sub-second levels. JWT authentication sits on top of this to make sure only verified users can join a call, which noticeably cut down on unauthorized connection attempts during testing.

What I'm proud of

Getting this to reliably support for users without things falling apart was probably the hardest part — a lot of trial and error with connection handling. I also managed to trim latency by around 30% after optimizing the signaling flow. And honestly, wrangling Git through 15+ messy merge conflicts while iterating on this solo taught me as much about version control discipline as the networking part did.

Wrapping up

Connect Now started as a "let's see if I can actually build this" experiment, and it turned into a solid crash course in real-time networking, backend design, and security — the kind of stuff that's easy to read about but only really clicks once you've broken it a few times yourself.

DEV Community: Basant Gautam

Building Connect Now: My Take on Real-Time Video Calling