[5] In 2014, she was adjudged the top performer in the girls under-20 category in the long jump event during the 84th edition of the John Tarbat Senior Athletic Championships.

[14] She also represented Sri Lanka at the 2019 Military World Games and claimed fourth position in the women's long jump event.

[15] She was included as one of the members of the Sri Lankan contingent for the 2020 Asian Indoor Athletics Championships, but the tournament was cancelled due to the threat of the COVID-19 pandemic.

[16][17] In June 2021, she surpassed the long-standing national record held by N. C. D. Priyadharshani in the women's long jump during the International Athletics Championships in Turkey by clearing a distance of 6.44 meters.

[18][7][19] In 2021, she received a special sports scholarship offer from the National Olympic Committee of Sri Lanka to gain training in Qatar.

[38][39] Sarangi Silva also set a record by becoming the first Sri Lankan long jumper, either male or female, to qualify for the final round of the Commonwealth Games.

[34] In May 2023, she toured Japan and competed in the Seiko Golden Grand Prix as part of her self preparations ahead of the 2022 Asian Games.