Dear Readers, Welcome to the callicoder blog.

My name is Rajeev Kumar Singh. I’m the founder, designer and editor of this blog.

I work as a Lead Engineer at GoJek, Southeast Asia’s SuperApp.

About CalliCoder

CalliCoder is a computer science education blog where I write about programming languages, web development, desktop app development and system design.

I started this blog so that I can share whatever I learn during my day-to-day job with other programmers. It gives me immense pleasure when people read my articles and say that It has helped them.

Moreover, This blog helps me organize my thoughts and improve my overall knowledge because It forces me to do thorough research before writing any article.

What does Callicoder mean?

Everyone who hears the name callicoder asks me what does it mean?

Well, Callicoder is derived from the word Calligraphy. Calli in Calligraphy means beautiful. So, the word callicoder is loosely related to the idea of writing beautiful/clean code (or being a beautiful coder :p).

The Logo of this blog is built around the idea of Zen symbol.

In Zen, ensō (“circle”) is a circle that is hand-drawn in one or two uninhibited brushstrokes to express a moment when the mind is free to let the body create. (Excerpt from wikipedia)

CalliCoder logo

The above icon is built by Nick Bluth of the noun project (credits to him for this awesome icon). I customized this icon further to create the logo of my blog.

What powers this blog?

This blog is powered by Hugo, a static site generated built using Golang. It uses a custom theme that I developed from scratch considering simplicity and ease-of-use in mind.

I’ve hosted this blog on Netlify, a cloud hosting platform for static websites.

How can I contact you?

You can write to me at I’ll try to respond as soon as possible. Alternatively, you can connect with me directly on twitter, linkedin or github.

How can I support you?

If you find my tutorials useful and want to help me create more such tutorials in future, then you can support me by donating on Patreon or Paypal :)