FreeCAD Computer-Use AI Training Specialist

OpenTrain AI, Inc.; United States; Hybrid; USD 34,000 - 41,000; Part time

Job summary

OpenTrain AI, Inc. seeks a part-time contractor to create expert demonstrations and evaluation data for CAD-focused AI training.

You will design realistic parametric CAD tasks in FreeCAD, record actions, and preserve relevant files, ensuring accurate mappings and repeatable workflows. Applicants should have strong mechanical design experience, FreeCAD mastery (Sketcher and Part Design), and the ability to review traces for realism and completeness, while working from remote locations with

Qualifications

• Core experience in mechanical design, product development or manufacturing engineering.
• Genuine proficiency in Sketcher and Part Design in FreeCAD.
• Troubleshooting skills for constraint-solver failures and geometry issues.
• Clear written English (B2 level or higher) for demonstrations and reviews.
• Familiarity with multiple FreeCAD workbenches (e.g., Assembly, TechDraw, Draft, Spreadsheet, FEM, CAM/Path).
• Ability to work with STEP/IGES/BREP/STL formats and mesh workflows.

Responsibilities

• Create task briefs from drawings, parameters, assemblies and TechDraw sheets.
• Build parts, sketches and FreeCAD deliverables while preserving engineering intent.
• Record demonstrations and explain reproducible workflows in clear English.

Skills

Mechanical design

Product development

Manufacturing engineering

CAD-focused role

FreeCAD proficiency

Troubleshooting

English communication

Documentation

Tools

FreeCAD

Screen-recording software

Job description

The work

You will create expert demonstrations and evaluation data for computer-use AI systems. The work involves designing realistic parametric CAD tasks, completing them in FreeCAD, recording the actions and interface state, and preserving relevant files before and after each task.

You will build accurate, repeatable workflows and review submitted demonstrations for realism, completeness, correct step-to-action mapping, and model quality. Keep recordings free of personal information and confidential geometry, use approved applications, and complete the work using your own expertise.

• Create task briefs from dimensioned drawings, spreadsheet-driven parameters, assemblies, TechDraw sheets, manufacturing preparation, and geometry exchange workflows.
• Build parts, sketches, assemblies, drawings, and other FreeCAD deliverables while preserving engineering intent in the model tree.
• Record complete demonstrations and explain reproducible workflows in clear English.
• Define dimensional and structural criteria for successful results.
• Review traces for realistic actions, complete steps, accurate mappings, and sound CAD models.

What it pays and takes

This is a remote, part-time contractor role with flexible hours. You should be able to run FreeCAD and screen-recording software on a supported operating system.

• Pay: $25 to $30 per hour.
• Time: 20 or more hours per week.
• Location: Open to candidates in Bangladesh, Bhutan, Brazil, Cambodia, India, Indonesia, Malaysia, Nepal, Pakistan, Singapore, Sri Lanka, Thailand, the Philippines, Timor-Leste, the United States, and Vietnam.
• Core experience: Mechanical design, product development, manufacturing engineering, or a comparable CAD-focused role.
• FreeCAD skills: Genuine proficiency in Sketcher and Part Design, with strong parametric modeling fundamentals.
• Troubleshooting: Ability to resolve constraint-solver failures, broken feature references, and problematic geometry.
• Additional tools: Working knowledge of at least two other FreeCAD workbenches, such as Assembly, TechDraw, Draft, Spreadsheet, FEM, or CAM/Path.
• File workflows: Familiarity with STEP, IGES, BREP, STL, and mesh formats.
• Communication: Clear written English at B2 level or higher.
• Quality standards: Consistent use of detailed rubrics.
• Equipment: FreeCAD and screen-recording software running on Windows 11, Ubuntu X11, or macOS.

About AI training work

AI training work uses examples and human reviews to help artificial intelligence systems perform better. People with specialized experience are needed to create accurate examples and judge whether a system's results meet clear technical standards.