Hi there, I'm Matt Sergei (do call me Matt, please) and asking you if this job is still relevant due to the other job:
https://www.freelancer.com/projects/web-search/job-data-collection-help/
If it is, can you provide some further information:
1. How much can you control your website (supposing you want to run this script on public web server)? For some services you need the system root/administrator security privileges can be required, generally not available on say shared hosting package.
2. Regarding to #1, what programming language can a "scraping" script be written in? Can you run PHP, Python, Node.js scripts/apps on your server? If you have a server in the web (not physically in your organization) you can ask for your hosting support regarding that.
3. And finally e-mailing. The number of e-mail messages sent by an hour is usually hard limited by ISP. Practically this means up to 1800 messages per hour (and 100-150 in one "batch"), usually less unless you use email (list) provider that has arrangements with ISPs.
But I guess this will be enough.
Of course I would need a list of the job portals you would like to query for to test - and they might have connection limits as well or can disable access for (usually) 5 minutes before you can try again if querying their service is too aggressive (several attempts per second etc).
Otherwise I'm webmaster and IT developer for 26 years.
Please message me first.
Looking forward to your reply and hope you're safe,
Matt