There was no luck though for team captain Jordan Moore who fell to a controversial defeat.
18-year-old welterweight Dossen, competing at middleweight for these championships, defeated the come-forward Hambardum Hakobya of Armenia, showing some real flashes of quality as well as grit to withstand constant pressure.
He will now box to guarantee a bronze medal – his third in as many major international tournaments – later in the week.
Dublin bantamweight Moore was given the nightmare draw of reigning champion and home favourite Eusebi Jitaru.
The rangey Glasnevin fighter gave a phenomenal display of outside fighting in the opening two rounds while Jitaru came on strong in the closer – and the Romanian would be handed the win, much to Moore’s displeasure.
Sunday March 25th
51kg Niamh Earley (Ireland) lost to Aikaterini Koutsogeorgo (Greece) 0-5
57kg Shauna Blaney (Ireland) lost to Nedkova Ivanova (Bulgaria) 1-4
Monday March 26th
52kg Conor Quinn (Ireland) lost to Maksim Stakheev (Russia) 1-4
91kg Kevin Sheehy (Ireland) lost to Felix Kuhne (Germany) 0-5
Tuesday March 27th
75kg Gabriel Dossen (Ireland) beat Hambardum Hakobya (Armenia)
56kg Jordan Moore (Ireland) lost to Eusebi Jitaru (Romania)
Quarter-Finals (dates to be confirmed)
48kg Shannon Sweeney (Ireland) v Mari-Emi Todorova (Bulgaria)
60kg Amy Broadhurst (Ireland) v Esra Yldiz (Turkey) or Marina Pasichna (Ukraine)
75kg Gabriel Dossen (Ireland) v TBC
Semi-Final (date to be confirmed)
75kg Aoife O’Rourke (Ireland) v Carlotta Paoletti (Italy)
48kg Shannon Sweeney (St Anne’s)
51kg Niamh Earley (Ryston)
52kg Conor Quinn (Clonard)
56kg Jordan Moore (Glasnevin) (Captain)
57kg Shauna Blaney (Navan)
60kg Amy Broadhurst (Dealgan)
75kg Aoife O’Rourke (Castlerea)
75kg Gabriel Dossen (Olympic)
91kg Kevin Sheehy (St Francis’s)
IABA President: Dominic O’Rourke
Team manager: Anna Moore & Paddy Osborne
Head coach: Dmitry Dmitruk
Coaches: Eoin Pluck, Thomas Murray, Valerie Hamilton
R&J: Philip Rooney