Job Description Storygold is hiring a Principal CAD Evaluation Engineer to own the end-to-end evaluation of language models performing complex tasks inside parametric CAD systems. This is not a mechanical-design or generic QA position. The role requires deep knowledge of CAD software internals, strong software-engineering ability, and the technical judgment to design, implement, and run rigorous CAD evaluations. Responsibilities Design benchmark tasks and evaluation protocols for parametric CAD workflows Write and refine prompts, tool instructions, scoring criteria, and evaluation rubrics Build execution harnesses that operate CAD software through APIs and automation interfaces Develop automated validators, graders, regression tests, and diagnostic tools Programmatically inspect CAD documents, feature trees, sketches, constraints, assemblies, configurations, references, and rebuild states Analyze B-rep topology, geometric validity, tolerances, mass properties, and model structure Determine whether failures originate from model reasoning, tool use, CAD automation, feature regeneration, constraint solving, the geometry kernel, or the evaluator itself Combine deterministic checks with expert technical review Define failure taxonomies and maintain consistent evaluation standards Work with CAD task creators and research engineers to improve benchmark quality and coverage Job Requirements Requirements 7+ years of experience developing CAD, CAM, CAE, geometric-modeling, or related engineering software Deep understanding of parametric CAD architecture, including: B-rep geometry and topology Feature history, dependency graphs, and regeneration Sketch and assembly constraint systems Geometric tolerances and model validity Boolean operations, intersections, offsets, fillets, and healing Topological naming and reference stability CAD file translation and interoperability Strong software-engineering ability in C++ or C#/.NET Practical experience with Python for automation, data processing, and evaluation pipelines Experience working with CAD APIs, geometry kernels, automated testing, or model-validation systems Professional experience with SolidWorks, NX, CATIA, Creo, Onshape, Fusion, Inventor, Solid Edge, or a comparable parametric CAD platform Strong debugging, systems-design, and technical communication skills English proficiency at B2 level or higher Preferred Qualifications Experience with SolidWorks API or SolidWorks automation Experience with Parasolid, ACIS, CGM, Open Cascade, C3D, or another commercial geometry kernel Experience developing production CAD software or geometric algorithms Experience building technical benchmarks, evaluation systems, automated graders, or test infrastructure Experience evaluating systems that use language models and external software tools