Gabriel Hamer-Webb will return to Cardiff after penning a new contract ahead of the 2024-25 season.
The Welsh qualified back-three flyer spent three months with the Blue and Blacks earlier this season, making four appearances with tries on his debut and against his former club Bath.
He departed at the beginning of the year and recently spent time with Northampton Saints but he has now pledged his allegiance to Cardiff.
Hamer-Webb said: “I’m immensely pleased. My family are all from here so it’s brilliant to get back to my roots.
“I really enjoyed my time at the club earlier this season. The boys were so welcoming and it only took a week or so until I felt part of the team. I really loved it.
“The Bath try obviously meant a lot to me but getting that debut try against the Stormers in a win against a stacked South African team was great.
“Next season I just want to get back into the team, keep building the momentum, helping the team collectively to get better and hopefully push on to Wales.
“I was obviously disappointed to leave Bath (at the end of last season) but the amount of learning experience I have gained to bring here, and the more time I spend with Cardiff will really improve me as a player.”
The 23-year-old came through the system at Bath Rugby and represented England at Under-20s level. He went on to play 32 first team appearances for the West Country outfit before departing at the end of last season.
He took the opportunity to spend time in New Zealand where he starred for Southland Stags in the NPC, before his short term stints at the Arms Park and Franklin’s Gardens.
Cardiff head coach Matt Sherratt said: “We were really impressed with Gabriel during his spell here earlier this season and we are pleased to secure his services for 2024-25.
“He is a superb athlete, a great professional and he offers us a bit of versatility in his ability to play wing and full-back.
“We saw a glimpse of his potential with some impressive performances in Blue and Black, he suits our style of play and I have no doubt there is more to come from him in Cardiff.”