No. You can search and apply for jobs without creating an account.
Having an account does have its benefits though! It will be easier and faster to apply for jobs as we can pre-populate the fields for you and you won't have to continually upload your CV for each job application.
You can also save jobs you view and apply for them later and best of all, by having an account you can keep track of the jobs you've applied for and manage them in your dashboard.