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Mechanical & Physical Systems Jobs at Startups — 2725 Open Roles | BuildList

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Jobs/Roles/Mechanical & Physical Systems

Mechanical & Physical Systems Jobs

Mechanical, aerospace, and physical-systems engineering roles at hard-tech companies.

2,725 open roles · Updated 8/11/2026

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AI Research⚙️ Mechanical & Physical Systems · Senior

Actuator Gear Design Engineer

San Francisco, CA

Boom Supersonic

Aerospace⚙️ Mechanical & Physical Systems · Mid-Level

Materials Engineer (Lab & Test)

Centennial, CO

Transportation⚙️ Mechanical & Physical Systems · Senior

Senior MRB Liaison Engineer

Marina, CA

Transportation⚙️ Mechanical & Physical Systems · Mid-Level

Mechanical Engineer - Turbomachinery

San Carlos, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Mid-Level

Turbomachinery Mechanical Designer

Torrance, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Mid-Level

Structures Engineer, Turbomachinery Static Hardware

Torrance, CA

AI Research⚙️ Mechanical & Physical Systems · Senior

Mechanical Commissioning Project Engineer

San Francisco, CA

Boom Supersonic

Aerospace⚙️ Mechanical & Physical Systems · Senior

Turbine Aerodynamics Lead

Centennial, CO

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Mechanical & Physical Systems

Energy & Climate⚙️ Mechanical & Physical Systems · Mid-Level

Rotordynamics Engineer, Turbomachinery

Torrance, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Mid-Level

Turbomachinery Aerodynamics Engineer

Hawthorne, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Mid-Level

Structures Engineer, Turbomachinery

Torrance, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Senior

Senior Process Engineer

Torrance, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Senior

Senior Thermal-Hydraulics Analysis Engineer

Torrance, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Staff / Principal

Staff CFD Analysis Engineer

Torrance, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Mid-Level

Turbomachinery Secondary Flow Engineer

Torrance, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Senior

Senior Mechanical Maintenance Lead

Orangeville, UT

AI Research⚙️ Mechanical & Physical Systems · Mid-Level

BIM Coordinator / BIM Designer

Remote·San Francisco, CA · Seattle, WA

AI Research⚙️ Mechanical & Physical Systems · Senior

Lead Thermal Simulation Engineer

San Francisco, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Senior

Senior Mechanical Engineer

Hawthorne, CA

AI Research⚙️ Mechanical & Physical Systems · Senior

Mechanical Engineer, Soft Goods Design

San Francisco, CA

AI Research⚙️ Mechanical & Physical Systems · Senior

Mechanical Engineer, Sensing

San Francisco, CA

AI Research⚙️ Mechanical & Physical Systems · Senior

Mechanical Design Engineer

San Francisco, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Mid-Level

Fire Protection Engineer

Hawthorne, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Director

Director of Infrastructure

Orangeville, UT · Los Angeles, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Senior

Health Physicist

Orangeville, UT

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Frequently asked questions

How many mechanical & physical systems jobs are on BuildList?: There are currently 2,725 open mechanical & physical systems roles listed on BuildList, refreshed hourly straight from company career pages.
What kinds of companies are hiring mechanical & physical systems?: Ambitious, fast-growing companies building the future — across AI, defense, aerospace, robotics, energy, and more. You can filter the list by sector, company stage, experience level, and location.
Are there remote mechanical & physical systems jobs?: Yes. Use the location filter, or open the remote view for this role to see only fully-remote mechanical & physical systems openings.
How do I apply for mechanical & physical systems jobs?: Every listing links straight to the company's own application page — BuildList doesn't sit between you and the employer, so there's no account or middleman.

Mechanical & Physical Systems in Defense

Software & Data

Infrastructure, IT, & Security

Electrical & Firmware

Manufacturing & Production

Test, Quality, & Reliability