Mechanical Engineer (Injection-Molded Plastics)

Location: Palo Alto, United States; on-site

Company

hirify.global is building Physical AI for real-world industrial deployment, starting with factory-floor robotics.

What you will do

• Own the mechanical design of A-surface plastic components, including covers, skins, shrouds, bezels, and cosmetic enclosures, from industrial design intent through production tooling.
• Develop Class-A surfaces and translate industrial design surfacing into manufacturable parts while maintaining gap-and-flush, parting line, draft, and aesthetic requirements.
• Select polymers and manufacturing processes based on appearance, impact and creep behavior, chemical and UV resistance, flammability, and cost.
• Define GD&T, datum schemes, and tolerance stack-ups across plastic assemblies and interfaces with structures, actuators, and electronics.
• Drive DFM and DFA for injection molding, insert molding, overmolding, and secondary operations, including gate, ejector, wall, rib, boss, warp, sink, and shutoff design.
• Work with tool shops, molders, and contract manufacturers through tool kickoff, T0/T1 sampling, tuning, PPAP, mold-flow and tool-design reviews, prototyping, and validation testing.

Requirements

• 5+ years of experience designing injection-molded plastic parts for high-volume consumer, automotive, or robotics products, including taking parts from CAD through production tooling.
• Deep hands-on knowledge of polymer materials science, including resin families, fillers, additives, anisotropy, moisture sensitivity, shrinkage, warpage, and process-dependent part behavior.
• Fluency in GD&T based on ASME Y14.5 or ISO GPS and tolerance analysis, including worst-case and statistical stack-ups.
• Experience owning cosmetic A-surface parts and defining appearance standards, textures, gloss levels, color matching, painting, plating, laser etching, and in-mold decoration.
• Strong surfacing skills in SolidWorks, CATIA, NX, Creo, or a similar CAD system, with the ability to read mold-flow results and tool drawings.
• Exceptional mechanical intuition, comfort with ambiguity, and a hands-on approach to solving complex robotics hardware problems.

Culture & Benefits

• Hands-on work with the physical world and real-world industrial robotics.
• Ownership of difficult mechanical design and manufacturing problems across the product lifecycle.
• Fast-paced environment that values curiosity and understanding how the complete system works.
• On-site collaboration in Palo Alto.