Bawling, 21, is a pacey winger who can also play in a variety of other positions.
He started his career in the academy at Watford, where he progressed through the youth set-up, spending a month on loan with National League South outfit Wealdstone as part of his development there.
In the summer of 2014, Bawling joined Crawley Town following a successful trial and made his League One debut as a half-time substitute in a 1-0 away win at Barnsley in August.
He went on to make seventy-one appearances in League One and Two for Crawley.
Bawling said: “I see myself as a right winger, I just want to try and perfect that position and get better at it. Add goals, assists, everything to really stand out, especially for a winger as that’s important.”
Manager Anthony Limbrick said: “Bobson has attributes that suit the way we want to play. His pace and directness will cause teams problems especially at home to get the team attacking on the front foot”.