Sho-Silva came through the youth ranks at Charlton Athletic, from whom he had two loan spells at Welling United and a brief stay at Scottish outfit Inverness Caledonian Thistle.
After being released by the Addicks he joined Dover`s league rivals Bromley last summer and scored 11 goals for the Hayes Lane outfit despite missing several matches through injury.
The 22-year-old has signed a two-year deal at Crabble.