Born in Mizoram, Lalengmawia started playing football from the age of six and rose through the ranks rapidly. In 2017, he became the only player from his state to make it into India's historic squad for the FIFA U-17 World Cup. Lalengmawia is a natural central midfielder, who is also capable of playing a more attacking role and as a left winger. He made 11 appearances for Indian Arrows in Hero I-League 2018-19 and also scored a goal. The Hero ISL 2019-20 season saw him turn up in the NorthEast United FC jersey, and he established himself as a starter instantly, commanding a strong passing accuracy of 80.45% in 10 matches. Retained ahead of the 2020-21 season, Lalengmawia will look to continue his run in the first team for the Highlanders.