  In the framework of light-cone gauge formulation, massless arbitrary spin N=1
supermultiplets in four-dimensional flat space are considered. We study both
the integer (super)spin and half-integer (super)spin supermultiplets. For such
supermultiplets, formulation in terms of unconstrained light-cone gauge
superfields defined on chiral momentum superspace is used. Superfield
representation for all cubic interaction vertices of the supermultiplets is
obtained. Representation of the cubic vertices in terms of component fields is
derived. Realization of relativistic symmetries of N=1 Poincare superalgebra on
space of interacting superfields is also found.
