As a single skater, he won the Finnish national championship in 1910 and 1911.

In 1910, he partnered with German figure skater Ludowika Eilers.

As pairs skaters, they won the World Championship in 1911, 1914, and 1923, and the Olympic gold in 1920.

They married in 1911, and in 1916 moved to Helsinki, where Jakobsson got a job of the technical director of Kone OY (now Konecranes), a leading manufacturers of cranes.

His specialty was dark city scenes with special light effects like rain or mist.