Require an expert in penetration testing to check security holes in a website/web application. Can also do penetration testing on devices or other apps. Must be a certified or capable ethnically hacker who can provide digital bodyguard services.
30 freelancers are bidding on average $1162 for this job
The time required can be varied depending upon the content of the website and the way you want it. If automated tool will be ok then it can be done in 5 days.