  Two-dimensional superconductors attract great interest both for their
fundamental physics and for their potential applications, especially in the
rapidly growing field of quantum computing. Despite intense theoretical and
experimental efforts, materials with a reasonably high transition temperature
are still rare. Even more rare are those that combine superconductivity with a
non-trivial band topology, to potentially host exotic states of matter such as
Majorana fermions. Here, we predict a remarkably high superconducting critical
temperature of 21-28 K in the easily exfoliable, topologically non-trivial 2D
semimetal W2N3 . By studying its electronic and superconducting properties as a
function of doping and strain, we find large changes in the electron-phonon
interactions that make this material a unique platform to study different
coupling regimes and test the limits of current theories of superconductivity.
Last, we discuss the possibility of tuning the material to achieve coexistence
of superconductivity and topologically non-trivial edge states.
