Numerous countries attempted to develop turbojet engines in the post-WW2 period. There were many failures: the J40, TR-1, and others. One of these unsuccessful engines was the Swedish STAL Dovern.
Attempts to develop an indigenous jet engine began at STAL (Svenska Turbinfabriks AB) in the late 1940s. The first engine developed by STAL was the Skuten, in 1948. This was a small, axial flow turbojet with 6 combustion chambers producing roughly 6.2 kN of thrust. The Skuten was intended primarily as a ground-run technology demonstrator, I am not aware of any attempts or plans to fit it