It's a simple Bash script that query how many jobs are available by country pulling data from indeed.com.
To use it, just type ./count_jobs.sh followed by the keyword you want to query. Let's suppose that you want to know the 10 countries with most open positions containing the phrase project manager, then:
$ ./count_jobs.sh project+manager | head
355873 United_States
92372 United_Kingdom
28406 Canada
26116 India
18575 Netherlands
15496 Australia
12937 Belgium
11765 Singapore
9618 China
8459 Hong_Kong