Lunchbreak
Senior Mechanical Engineer – CAD Expert (Contract)
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Mechanical Engineer – CAD Expert (Contract)
Role Type: Contractor
Location: Remote (North America and Europe Preferred)
Rate: $40–90 USD/hour
Experience: 5+ years
About the Role
We're looking for an experienced Mechanical Design Engineer with deep CAD and manufacturing expertise. You'll apply real-world design knowledge to help measure how frontier AI systems perform through high-quality technical input. No prior AI experience is required. Your mechanical engineering expertise is what matters.
About Lunchbreak
The Lunchbreak Consulting Program brings domain experts together to help shape the next generation of AI. Our experts have gotten from application to first project payment within 7 days. Apply the judgment and experience you’ve built in your field to evaluate AI responses, develop real-world challenges, and help models understand what good work looks like. We work closely with frontier robotics teams to bridge real-world data, simulation, and learning-based systems.
Scope of Work
- Create and modify detailed 2D drawings and 3D models of mechanical components and assemblies using industry-standard CAD tools.
- Convert concepts, sketches, specifications, and legacy drawings into complete, production-ready CAD models and drawings.
- Prepare assembly drawings, detailed drawings, bills of materials, and supporting technical documentation.
- Apply GD&T, dimensioning, and tolerancing in accordance with ASME Y14.5, and perform tolerance reviews and stackup analyses.
- Specify materials, finishes, coatings, and manufacturing notes to clearly convey design intent.
- Review, critique, and improve existing engineering drawings and documentation for clarity, completeness, fit, function, and manufacturability.
- Apply design for manufacturing (DFM) and design for assembly (DFA) principles to optimize parts for real-world production.
- Clearly document and explain manufacturing processes, design decisions, and engineering concepts in written form.
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Required Qualifications
- 5+ years of professional mechanical design or CAD drafting experience, with parts taken from concept through manufacturing.
- Bachelor's degree in Mechanical Engineering or a related field, or equivalent education and experience.
- Expert proficiency in at least one major 3D CAD platform (SolidWorks, Creo, NX, CATIA, Inventor, Fusion 360, or Onshape).
- Strong command of GD&T, ASME Y14.5, drafting standards, and production-ready drawing practices.
- Solid understanding of mechanical design fundamentals, including fits, clearances, tolerances, fasteners, material selection, and manufacturing processes such as machining, fabrication, and forming.
- Experience with BOMs, drawing revisions, ECRs/ECOs, and document control practices.
- Excellent written communication skills and the ability to work independently in a remote environment.
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Preferred Qualifications
- Proficiency across multiple CAD platforms.
- Working knowledge of FreeCAD for interpreting or referencing models.
- Experience with FEA software, including model pre-processing and results post-processing; CFD familiarity is a plus.
- Experience with SolidWorks PDM or other PLM systems.
- Familiarity with AWS weld symbols.
- Background in heavy equipment, industrial machinery, power generation, or propulsion systems.
Hiring Timeline
We move quickly. Once you submit your application, our team will review your background and you can expect to hear back about next steps within 48 hours.
Requirements added by the job poster
- Bachelor's Degree
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