To join a company, select the “Invite Code” tab on the registration screen, enter your code, and complete the registration — after that, you’ll be automatically added to the company.
If you don’t have a code yet, you can select the “Employee” role during registration, create your account, and enter the invite code later in the settings.
Note: Joining a company is not automatic — the employer must approve your request. Until it’s confirmed, you may see a message indicating that you are not yet part of the team.