Reality Labs Research (RL-R) is looking for a Research Engineer to develop input and interaction solutions for virtual, augmented, and mixed reality experiences. The role involves executing advanced sensing and signal processing, experimenting with new interaction methods using novel hardware and sensing technologies, designing and implementing experiences, and collaborating with a team of researchers and engineers. The ideal candidate will be involved in the full stack of HCI problems, from low-level input processing to application and interface design. The role requires adaptability, constant learning, and embracing the ambiguity of research in a collaborative environment.