How to Modify the "Add a Job" Page

Hello:

Do you have the tools or techniques or codes or coding for modifying the following "add a job" page? An example is the link:

Here is an example of what I would like to modify:

Notification Email
Email to receive application notification. Leave it blank to use Employer's profile email.

Posted by ( Employer - Company )

Company
Use this option when you want to assign job to company without creating an employer.

Job's Expiration Date

Cover Image
Address

Salary Offer
0 ~ $3000$3000 ~ $10.000$10.000 ~ $20.000$20.000 ~ $50.000$50.000 ~ $100.000$100.000 ~

Experience Level

Total Years Experience

Radio field

Option 1
Option 2
Option 3

Dropdown field

Multiple Select field
- Select Multiple Select field -
Checkbox field

Option 1
Option 2
Option 3

Text Area field