He is the Golden Belt 60kg Lethwei world champion under traditional rules and is currently competing in ONE Championship in the Bantamweight division.

He was born in Inn Shey village in Thaton Township, Mon State and is a member of the Karen ethnic group.

[3] Soe Lin Oo has often been called by the nicknames Man of Steel and Ironman due to his incredible pain threshold, which is a crucial aspect among today's Lethwei fighters.

On June 10, 2017, Soe Lin Oo made his debut on World Lethwei Championship at WLC 2: Ancient Warriors, where he faced Artur Saladiak.

[7] On August 5, 2018, Soe Lin Oo faced Muaythai World Champion Iquezang Kor.Rungthanakeat at Thein Pyu Stadium in Yangon.

[14] On August 14, 2022, Soe Lin Oo is set to compete at the Myanmar Lethwei World Championship (MLWC) at Thein Pyu Stadium in Yangon.