He attended school at Immanuel Lutheran College,[4] where he met his wife Emily.

[7] Harri's car racing career began in 2015 with the Queensland Formula Ford Championship.

Harri competed in the 2017–18 MRF Challenge Formula 2000 Championship, taking place in India and Middle-East.

[10] At the start of 2017 Harri made his sports car racing debut in the 2017 Bathurst 12 Hour.

Together with his teammates Max Braams, Nicolaj Møller Madsen and Jörg Viebahn he won in the GT4 Category for PROsport Performance.

[11] In 2019, Harri joined forces with McElrea Racing to campaign in the Porsche GT3 Cup Challenge Australia.

[12] In preparation for a full-time drive in 2020, Harri raced on the streets of Surfers Paradise for the last round of the 2019 Porsche Carrera Cup Australia.