Lajoie and Lagha began their careers with a string of domestic titles in the youth ranks, including gold medals at the 2015 Canadian Novice Championships and 2015 Canada Winter Games, before making their international junior debut.

[4] Currently a student in contemporary dance at Concordia University, he identified coaching as his planned vocation following the end of his competitive career.

[1] He formed an ice dance partnership with Marjorie Lajoie in 2011, coached by Julien Lalonde, Mylène Girard, and Valérie Allard in Saint-Hubert, Quebec.

[3][10][4] They then moved to train with Dubreuil, Patrice Lauzon, Romain Haguenauer, and Pascal Denis in Montreal, Quebec.

Lajoie called it "a super fun competition," while Lagha thought "we didn't get the scores we wanted but what's most important is the public and ourselves were satisfied with the performance.

[16] Lajoie and Lagha were given two assignments on the 2016–17 Junior Grand Prix series, first finishing fourth at the JGP Japan in Yokohama.

Lajoie admitted that it was "unfortunate we couldn’t have placed higher," while vowing "there’s still a lot of work to do in order to increase our scores even more.

"[18] At the 2017 Skate Canada Challenge, Lajoie and Lagha broke the Canadian record in junior ice dance, held since 2005 by Tessa Virtue and Scott Moir.

[16] Lajoie and Lagha opened the 2017–18 Junior Grand Prix series with a silver medal win at the JGP Australia event in Brisbane.

"[23] They went on to win gold at JGP Croatia in Zagreb, setting new personal bests in the short dance and combined total score.

After a month of recuperating, she returned to training two weeks before the Junior Grand Prix Final, where the duo placed sixth.

Lajoie expressed dissatisfaction with the performance, stating, "the presentation was good, but there’s a lot of work to do at the technical level.

[26] At the Final, Lajoie and Lagha placed fourth, 0.03 points behind bronze medalists Elizaveta Khudaiberdieva and Nikita Nazarov, following a one-point deduction for an extended lift.

They next came fourth at the 2019 CS Finlandia Trophy, missing the podium by less than two points due to an invalidated choreographic character step.

[37] Competing at Four Continents in Seoul, Lajoie/Lagha placed fifth in the rhythm dance with a new personal best score of 76.43, an increase of over five points internationally.

[45] Lajoie and Lagha made their season debut at the 2021 CS Autumn Classic International, where they placed fourth.

"[47] On the Grand Prix at the 2021 Skate Canada International, the first Canadian competition with an audience in over a year and a half, Lajoie/Lagha placed sixth.

[49] Competing at their second senior Canadian championships, held in Ottawa without an audience due to restrictions prompted by the Omicron variant, Lajoie/Lagha placed third in the rhythm dance.

"[53] They concluded the season at the 2022 World Championships in Montpellier, with the International Skating Union banning all Russian athletes due to their country's invasion of Ukraine.

"[57] On the Grand Prix at the 2022 Skate Canada International, Lajoie/Lagha were fourth in the rhythm dance after errors put them narrowly behind Americans Green/Parsons.

They had spent the intervening time working on their twizzle element, which had given the issues at their first Grand Prix event, and said they were pleased with the resulting performance.

[64] Despite low step sequence levels, they placed third in the rhythm dance, 2.07 points clear of fourth-place Carreira/Ponomarenko, while expected rivals Green/Parsons were a distant fifth after Parsons fell.

Lagha called the result "the cherry on top of a perfect season," with Lajoie noting "we have a podium finish in every competition" that they had entered.

[67][68] Lagha suffered a shoulder injury in May 2023, hindering their preparations for the 2023–24 season, further complicated by subsequent back strain.

Wanting to use a Montreal artist for their free dance, in celebration of the World Championships being held in their home city that year, they eventually settled on "Roses", a piece by local pianist Jean-Michel Blais.

"[69] They first appeared on the Grand Prix at the 2023 Skate America, where they placed second in the rhythm dance, 0.60 points clear of French training mates Lopareva/Brissaud in third, despite getting only a level 1 on the midline step.

[72] At the 2023 Cup of China, they unexpected won the rhythm dance over pre-event favourites and fellow Canadians Gilles/Poirier after the latter had a twizzle error.

[78] Lajoie was able to resume training for their hometown World Championships, having received full clearance from her physicians a week beforehand.

[81] After missing two weeks of training, they returned to the ice in a "slow and deliberate" manner, and were able to compete at their first Grand Prix assignment, the 2024 Skate Canada International in Halifax.

[84] At the Final, Lajoie/Lagha finished an unexpected fourth, narrowly defeating Canadian champions Piper Gilles and Paul Poirier for the first time after the latter had a fall in the rhythm dance.