I think there is very little overhead on both the server side and the client. Server side is written in C++ with libuv for networking and client side is written in pure javascript without the use of any frameworks or libraries.
It feels increasingly like there are too many programmers for too few programming jobs.
Here in Denmark many companies are so picky that they only hire people with a MSc in CS/CE. Many of them have also outsourced HR to recruiting companies which is an absolute disaster for people who are self-taught or only have a BSc.
Why do you and other coding bootcamps pretend to be anything else than intensive web development courses?
Another coding bootcamp called "Hack Reactor" is claiming to be "The CS degree for the 21st century" on the front page and on another page they write "Become a Software Engineer".
That means we need to be doing something to get more people into our industry.
Why? What's in it for me?
The EU has published similar numbers, 1.2 million in 2018—three years
I am a first-year CS student in Denmark and I hope you don't succeed in getting more people into the industry to fill those jobs before I graduate.
The lack of (talented) programmers is going to put young CS/CE grads in an advantageous position both in term of salary and job opportunities. I am happy employers are having a hard time finding people to fill those jobs. That makes life easier and safer for me.
The people screaming for more programmers here in Denmark are people in the government and Dansk Industri (lobby group representing bigger Danish corporations). The government cares about something they call "Denmark's global competitiveness" and the lobbyists in Dansk Industri want to flood the market so they can lower programmers' salaries. I don't care about the former line of buzzwords and the later is a hostile action taken against me as a programmer.
Don't get me wrong. I care about our industry. I will contribute to open source in the summer leave and I am involved in organizing some monthly meetups. But in the end of the day I also want a job.
Here in Denmark IT companies are extremely elitist. Tons of simple ASP.NET and Java EE jobs require a master's degree in CS or CE.
Contrast this with the coding bootcamps and "everyone can learn to code" culture in the US and you can see why innovation is so slow here in Denmark.
I am a CS student genuinely interested in compiler construction, distributed systems and programming language design so I don't feel I'm being forced to take a CS degree to get an IT job.
But I still think it's sad that you need an advanced degree to get CRUD web/business app development jobs.
So Agar.io is probably making money.
The dev describes his stack here: https://news.ycombinator.com/item?id=9463842