The Early Career Ryll-Nardzewski Prize is to be awarded for outstanding achievements in mathematics in areas related to the work of Czesław Ryll-Nardzewski, obtained after the candidate's PhD dissertation and not included in it. The prize is open to researchers under 36 years of age and is a sponsored prize of 10,000 euros.

Serhii got the prize in recognition of solving several difficult problems in general topology, set theory and algebra and his versatile research in these fields. Among the problems solved by the laureate are the problem of Sakai concerning the existence of a $C_p(X)$ space which is a Pytkeev space but not a Frechet–Uryshon space, a long-standing problem of Gerlits and Nagy concerning the existence of delta-sets which are not gamma-sets, the problem of Tzannes concerning the existence of special rigid spaces.

The award ceremony and laureates' lectures will take place on September 9, 2026, as a part of the Ryll-Nardzewski Day — the third day of the international conference Chilean–Polish Mathematical Meeting.