Back-end Development focuses on databases, scripting, website architecture. 

Your earning possibility depends on the stack you are capable of learning. 

It has the highest entry point to start in your side hustle list. Before you start back-end development try to focus on one language and learn the logic behind that. 

After you learned the programming language choose a framework you are interested in.

Computer;
Ability to learn to code.

$2000 - 8000 monthly

✅ Small competition

✅ Great side income

✅ You can create your own apps

✅ Scalable

❌ Hard to start

❌ It takes time to start earning money

❌ Can get boring in the long-term

First of all, we recommend you try to find work locally and get some experience. Later on, you can use platforms like Upwork and Fiverr to find some clients.