Below are key details.

$40–$100 per hour equivalent, paid per task
About 15 hours a week, you choose when

Work on the cutting edge of AI, on your own schedule, and get paid for the mechanical design expertise you already have.

The AI systems everyone is talking about are trained and tested by real engineers and designers. The teams building them need mechanical design engineers who can create accurate CAD models and manufacturing documents, check that the work is correct and ready for production, and write the technical documentation a practitioner would provide. Your judgment becomes part of how the next generation of AI models understands mechanical design and manufacturing. This is that work, done remotely around your current job.

What you'll do

Build and update mechanical part and assembly models as parametric 3D CAD files, using FreeCAD or a comparable platform
Add GD&T callouts and tolerance stack-ups to manufacturing drawings
Design components for sheet-metal work, CNC machining, plastics or injection molding
Assess technical documents and CAD models for production accuracy and manufacturability, then incorporate the technical feedback

Why this is worth your time

Build real AI skills alongside your current job while earning the equivalent of $40–$100 an hour
Work directly with frontier AI tools and see how they are built, tested and improved, experience most mechanical design engineers will not have for years
Build a career edge for what comes next: AI is reshaping mechanical design and manufacturing, and the people who understand it from the inside will lead that change
Fully remote and flexible, no fixed shifts, no commute

Who this is for

At least two years' experience designing mechanical components for manufacturing
Hands-on professional use of FreeCAD or another parametric CAD tool for advanced modeling, assemblies and drawings, plus strong GD&T, tolerance analysis and design-for-manufacturing knowledge
Professional fluency in English, with clear communication in writing and conversation for collaborative technical reviews and documentation
No AI experience needed. You bring the expertise; we bring the training on the tools.

Pay and details

$40–$100 per hour equivalent; pay is per task, as an independent contractor
About 15 hours a week, you choose when; fully remote, Germany

About OpenTrain AI

OpenTrain AI connects experienced professionals with paid, part-time AI training work: shaping and improving the AI systems that companies are building right now.

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