Stravius appeared on the world stage at the 2009 European Short Course Swimming Championships in Istanbul where he was part of the winning 4 × 50 m freestyle relay and finished in the top 8 in the 50 m breaststroke.

The next year at the 2010 European Short Course Swimming Championships in Hungary, Stravius won his first medal at an international meet, winning a silver in the 100 m backstroke.

[1] On 28 July 2013, at the FINA World Championships in Barcelona, Stravius was part of the winning 4 × 100 m medley relay where he swam the butterfly leg.

The French were the defending Olympic champions but were seeded outside the middle lanes in the final, causing Stravius to remark "On n'était pas favoris, c'est un hold up".

[2] In the final, after 200 m where France was far off from the leading three teams, Fabien Gilot exploded through with a 46.90s third leg to bring the French back into contention.