splitting the URL using jQuery

Not really a WordPress related question but you could do this

// creates a object from the array, one of the properies (search) contains the query
let url = new URL('https://dev/job/?job_id=jkdbsbd45JubJKAAASSYT');
// will create a object of all availalble query properites
const urlSearchParams = new URLSearchParams(url.search);
const params = Object.fromEntries(urlSearchParams.entries());
// remove ? and everything after from url
url = url.href.substring(0, url.href.indexOf('?'));

// url + params.job_id is the final url, did a console.log so you could see it in the devtools console
console.log(url + params.job_id);