Mindrift is seeking a freelance Mechanical CAD & Simulation Engineer in Spain to help train and evaluate AI agents working in CAD environments. Candidates must have a degree in Mechanical or Aerospace Engineering, 5+ years of hands-on CAD modeling experience, their own active professional CAD license, familiarity with Python and GitHub, and B2-level English proficiency. The role involves designing geometry, building reference solutions, and evaluating agent outputs for 10–20 hours per week.