His father was a policeman, and Soldini received his early education in Lugano, then trained as a stonemason in Bellinzona and Viggiù.
From 1873 he enrolled at the Brera Academy and worked under Vincenzo Vela.
By 1877 Soldini was producing independent works as a sculptor and was active in Milan and later in Bissone.
At the 1887 National Artistic Exposition of Venice he also exhibited a sculpture of game.
[2] He completed four medallions in the spandrels of the cupola hall of the Federal Palace in Bern.