We report on superconductivity in Nd1−xEuxNiO2using Eu as a 4f dopant of the parent NdNiO2infinite-layer compound. We use an all–in situ molecular beam epitaxy reduction process to achieve the superconducting phase, providing an alternate method to the ex situ CaH2reduction process to induce superconductivity in the infinite-layer nickelates. The Nd1−xEuxNiO2samples exhibit a step-terrace structure on their surfaces, have aTconset of 21 K atx= 0.25, and have a large upper critical field that may be related to Eu 4f doping.