Product Engineer (Mechanical)

About Unlimited :

Unlimited is an AI-native engineering and construction company reimagining how large-scale physical infrastructure gets built – from factories to power plants to entire industrial systems. We’re already delivering real projects with customers across multiple industries, using our AI-first engineering platform to design an order of magnitude faster than industry norms.

Backed by some of Silicon Valley's top investors, we’re building a small, engineering-led team to scale what’s working and to take on one of the most important challenges of the coming decades.

About the Role :

We’re looking for talented mechanical engineers who take ownership from initial design through construction. You’ll help build the systems that move the physical world : industrial fluid systems, rotating equipment, HVAC, process utilities, and mechanical structures across mining, critical minerals, power plants, data centers, and advanced manufacturing.

This isn’t a traditional role. You’ll work within our AI-native engineering framework, using intelligent tools that learn from you as you work. Your engineering judgment and field experience will be encoded into the system itself, shaping how it designs and builds over time. The right person will see this as more than a faster way to engineer – it’s a chance to embed their knowledge into a system that scales their impact across every future project Unlimited builds.

What You’ll Do :

• Lead design, integration, and commissioning of mechanical and utility systems across entire facilities including piping, heat exchangers, pumps, compressors, HVAC, and process utilities.
• Use and improve Unlimited’s AI-powered engineering tools to automate design, simulation, and coordination.
• Collaborate with software, electrical, and civil engineers to deliver complete, field-ready systems.
• Participate in projects from concept through commissioning, validating automated designs against real-world constraints and refining system logic.
• Develop operational procedures and field test plans for mechanical systems.
• Identify failure modes, run root-cause analyses, and drive rapid design iteration for improved reliability and performance.

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