Jack badge depends on the player level as follows:

• Accounts from Level 4 to 5 receive the bronze Badge.
• Accounts from Level 6 to 7 receive the silver badge.
• Accounts from Level 8 to 9 receive the gold badge.
• Accounts from Level 10 to 11 receive the ruby badge.

Please click the following link for more details about the badges you can earn and their requirements:
https://blog.jawaker.com/jawakerbadges-en/