FreeCAD Manufacturing Design Engineer

OpenTrain AI, Inc.; Northern (KY); Hybrid; USD 55,000 - 138,000; Part time

Job summary

OpenTrain AI, Inc. is seeking a remote, part-time contractor to develop and review mechanical CAD models and drawings for AI training materials. The role emphasizes manufacturing know-how, GD&T, tolerance analysis, and clear technical documentation.

The work involves designing parts for sheet metal, plastics, and CNC machining, plus updating models based on engineering feedback. Prior AI training experience is not required.

Qualifications

• At least two years designing mechanical components for manufacturing.
• Proficient with FreeCAD or similar parametric CAD software.
• Strong GD&T and tolerance analysis knowledge.
• Ability to produce manufacturing-ready drawings and documentation.
• Experience reviewing designs for manufacturability and production readiness.

Responsibilities

• Create and revise parametric 3D CAD models of mechanical parts and assemblies in FreeCAD or similar software.
• Produce manufacturing-ready engineering drawings with GD&T and tolerance stack-ups.
• Design parts for sheet metal fabrication, CNC machining, plastics, and injection molding.
• Review CAD models for accuracy and manufacturability.
• Write concise technical documentation and assembly instructions for AI training materials.
• Update models and documentation based on technical review feedback.

Skills

CAD design

GD&T

Tolerance analysis

Manufacturing knowledge

Documentation

Tools

FreeCAD

Parametric CAD

Job description

The Work

You will create technical CAD examples that help train AI systems. The work combines mechanical design, manufacturing knowledge, quality review, and clear engineering documentation.

• Create and revise parametric 3D CAD models of mechanical parts and assemblies in FreeCAD or similar software.
• Produce manufacturing-ready engineering drawings with geometric dimensioning and tolerancing and tolerance stack-ups.
• Design parts for sheet metal fabrication, CNC machining, plastics, and injection molding.
• Review CAD models for accuracy, manufacturability, and production readiness.
• Write concise technical documentation and assembly instructions for AI training materials.
• Update models and documentation based on technical review feedback.

What It Pays and Takes

This is a remote, part-time contractor engagement for someone with practical mechanical design experience in manufacturing environments. Prior AI training experience is not required.

• Pay: $40-$100 per hour.
• Schedule: Approximately 15-20 hours per week.
• Location: Remote, with eligibility limited to the countries listed for this role.
• Language: English.
• Experience: At least two years designing mechanical components for manufacturing.
• Technical skills: Professional expertise with FreeCAD or similar parametric CAD software, including advanced modeling, assemblies, and drawing generation.
• Knowledge: Strong understanding of GD&T, tolerance analysis, Design for Manufacturing, and production-grade CAD review.
• Useful experience: Designing parts for sheet metal, CNC machining, plastics, or injection molding.
• Communication: Clear written and verbal communication for technical documentation and collaborative review.

About AI Training Work

AI training is the human work behind many AI systems, including creating examples, reviewing technical content, and rating model outputs. Experienced engineers are needed because they can judge whether generated designs and documentation meet real manufacturing standards.