Mindrift is seeking a freelance Mechanical CFD Engineer based in the United States to train and evaluate AI agents on expert-level fluid simulation tasks. Candidates must have a degree in Mechanical or Aerospace Engineering (or related field), industry or research experience with CFD tools such as OpenFOAM, ANSYS Fluent/CFX, or STAR-CCM+, and proficiency in Python and GitHub. Proficiency in English at a B2 level or above is also required.