Senior Mechanical Design Engineer, Part-Time AI Evaluation - Remote (52 countries)

OpenTrain AI is hiring for this role.

• $40–$90 per hour

• 100% remote

• Part-time

• About 15–20 hours a week, you choose when

Use your mechanical design expertise to evaluate how AI systems understand complex CAD assemblies, on a schedule you choose.

Help evaluate AI systems on mechanical design by studying complex CAD assemblies, creating difficult technical questions, checking answers against models, and explaining the reasoning clearly.

What you'll do

• Review multi-part CAD assemblies to identify the design intent, key constraints, major decisions, and ways the design could fail

• Build difficult technical questions from CAD models, then check the answers against the models for defensibility

• Review AI-generated mechanical reasoning and identify conclusions that lack accuracy, completeness, clarity, or support

• Refine unclear questions, recommend focused improvements, and document edge cases and reviewer disagreements with clear reasoning and traceability.

Why this is worth your time

• Get paid $40–$90 an hour for mechanical-design AI evaluation work.

• Use your mechanical design judgment to evaluate model answers and document clear feedback.

• Contribute clear, traceable mechanical-design feedback on AI-generated answers.

• Fully remote and flexible, no fixed shifts, no commute

Who this is for

• At least five years of experience creating multi-part mechanical assemblies and overseeing them from concept

• Demonstrate mastery of at least one of the major parametric CAD tools, such as Solid Edge, Onshape, Fusion, Inventor, CATIA, NX, Creo or SolidWorks

• Bring strong understanding of assembly design intent and tolerance judgment, with experience in mechanisms, kinematics, and GD&T, plus strong written communication in English

• Experience relevant to this work includes tooling and fixture design, consumer products, medical devices, aerospace, automotive, robotics, or industrial machinery; teaching, mentoring, design reviews, or coaching engineering teams is helpful.

• No AI experience needed. You bring the mechanical design expertise; the work provides structured CAD-review evaluation tasks and feedback criteria.

Pay and details

• $40–$90 per hour, paid hourly as an independent contractor

• Part-time; fully remote; flexible schedule; open to candidates in United Arab Emirates, Argentina, Austria, Bangladesh, Belgium, Bahrain, Brazil, Canada, Switzerland, Chile, Colombia, Germany, Denmark, Algeria, Egypt, Spain, France, United Kingdom, Ghana, Greece, Indonesia, India, Italy, Jordan, Japan, Kenya, Kyrgyzstan, Kuwait, Kazakhstan, Lebanon, Sri Lanka, Morocco, Mexico, Malaysia, Nigeria, Netherlands, Oman, Peru, Philippines, Pakistan, Palestine, Portugal, Qatar, Saudi Arabia, Singapore, Thailand, Tunisia, Taiwan, United States, Uzbekistan, Vietnam, or South Africa.

How to apply

1. Apply on OpenTrain (about two minutes): https://app.opentrain.ai/api/out/cmur9yaje000h06pb1accmche?ch=qajobsboard&sub=p_qajobsboard

2. Complete the application on the hiring platform with your resume, professional profile, phone number, location, and 10 screening questions.

3. If shortlisted, take a short AI interview soon after you are invited.

Use your mechanical design expertise in AI evaluation work.

About OpenTrain AI

OpenTrain AI is hiring for this part-time AI evaluation role.