Seoposenwe was a key player for South Africa at the 2018 CAF Africa Women Cup of Nations with Banyana Banyana reaching the final only to lose to Nigeria in a penalty shootout. The result qualified South Africa for the 2019 FIFA Women's World Cup for their first appearance at the competition, with Seoposenwe part of the 23 player squad for the tournament in France. At the competition, she featured in matches with China and Spain.
