Smit went to Hoërskool Middelburg, which is in the Pumas Rugby Union's catchment area. He represented Pumas youth teams at the Under-16 Grant Khomo Week in 2008 and at the premier high schoolrugby union competition in South Africa, the Under-18 Craven Week in both 2009 and 2010.
After high school, Smit moved to East London where he joined the. He was named in their senior squad for the 2012 Vodacom Cup competition, but failed to make a matchday squad. In the second half of the season, he made ten appearances for the side during the 2012 Under-21 Provincial Championship and scored four tries, which included a brace in their match against the s. His side finished bottom of Group A and had to play in a relegation play-off against the Group B winners,. Smit played the full 80 minutes as Border ran out 21–15 winners to retain their Group A status. He was once again named in their senior squad for the 2013 Vodacom Cup competition and this time he did get some playing time; he made his first class debut in their opening match of the season, coming on as a second-half replacement in their 6–72 loss to the in Durban. He also played off the bench in their matches against Argentine side in Stellenbosch and in Paarl. He was also included in their squad for the 2013 Currie Cup First Division competition and made his debut in the Currie Cup in a 26–22 victory over the in Potchefstroom. His first appearance in a home match came in their next game against eventual champions, the in a 20–38 loss. Smit also featured in nine matches for a side that lost all twelve of their matches during the 2013 Under-21 Provincial Championship Group A, but he scored a crucial try in their 23–21 victory against the s in the relegation play-off. He left the Border Bulldogs at the end of 2013, having made five appearances, all of them as a replacement.
Leopards / NWU Pukke
He moved to Potchefstroom for the 2014 season and scored two tries in eight substitute appearances for their university side, the, in the 2014 Varsity Cup, helping his side all the way to the final. He kicked a conversion and a penalty in the final against, but it wasn't enough as UCT won the title in dramatic fashion, fighting back from 33–15 down with five minutes to go to achieve a 39–33 victory. After the Varsity Cup, he also made a single appearance off the bench for the in the 2014 Vodacom Cup competition against in an 8–32 defeat in Klerksdorp. For 2014, the South African Rugby Union introduced a 2014 Currie Cup qualification competition, with the winner earning a spot in the 2014 Currie Cup Premier Division. Smit was included in the Leopards' squad for this competition and made his first senior start in their opening match of the competition, a 51–23 victory over the. He retained the number nine jersey for the rest of the competition, starting in all six of the matches. He scored his first career try in the Leopards' 70–25 win over the, followed that up by two tries in their next match, a 55–23 win over the, and also scoring one try in the Leopards' final match of the tournament, a 103–15 demolition of his former side, the. The Leopards finished second in the competition, with a 32–33 defeat to in Round Three condemning them to finish behind the men from Kimberley and therefore progressing to the 2015 Currie Cup First Division. Smit made three starts during the group stages of the competition, scoring a brace of tries in their final match against the in a 50–29 victory as the Leopards topped the log. He also started their semi-final match against the Falcons, with the team from the East Rand running out surprise 31–24 winners to eliminate the Leopards from the competition. He again started off the 2015 season playing Varsity Cup rugby for the. He started all nine their matches and scored five tries as they matched their 2014 performance, making it all the way to the final. However, they once again finished as runners-up, this time losing 33–63 to the Bloemfontein-based. Smit's performances didn't go unnoticed and he was named in a Varsity Cup Dream Team after the competition. He played in the team's match against the South Africa Under-20 side, scoring a second-half try in a 24–31 loss for the students. He also played in the Leopards' final match of the 2015 Vodacom Cup season against in Cape Town.
Lions
In May 2015, Smit was named on the bench for the ' Super Rugby match against the in Johannesburg.
