Jobs/Roles/Mechanical & Physical Systems

Mechanical & Physical Systems Jobs

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

2,551 open roles · Updated Sep 22, 2026

2,551 jobs

CesiumAstro Staff Mechanical Engineer

Westminster, CO

$133k–$161k / year

Job type: Mechanical & Physical Systems
Seniority: Staff / Principal
Sector: Aerospace

Ursa Major Staff Turbomachinery Engineer

Berthoud, CO

$132k–$165k / year

Job type: Mechanical & Physical Systems
Seniority: Staff / Principal
Sector: Aerospace

Cowboy Space Corporation Fluids Engineer - Propulsion Valves, Ducts, Lines

Kent, WA · Washington, D.C.

$130k–$195k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Aerospace

Harmattan AI Mechatronics Engineer – Tooling & Production Equipment

France

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Defense

Fluidstack Resident Mechanical Engineer (PHX)

Phoenix, AZ

$208k–$263k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Compute & Semiconductors

Commonwealth Fusion Staff Modeling and Simulation Engineer

Milpitas, CA

$130k–$200k / year

Job type: Mechanical & Physical Systems
Seniority: Staff / Principal
Sector: Energy & Climate

Varda Space Biologics Formulation Research Internship - Spring 2027

El Segundo, CA

$69k / year

Job type: Mechanical & Physical Systems
Seniority: Intern
Sector: Aerospace

Inversion Senior Dynamics Engineer

Playa Vista, CA

$137k–$193k / year

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Aerospace

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SpaceXAI Reliability Engineer (Data Center Infrastructure)

Southaven, MS · Memphis, TN

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: AI Research

Hermeus Lead Propulsion Component Engineer

Los Angeles, CA

$139k–$187k / year

Job type: Mechanical & Physical Systems
Seniority: Manager
Sector: Aerospace

Rivan Senior Process Engineer (Direct-air-capture)

United Kingdom

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Energy & Climate

Firefly Aerospace Thermal Engineer II

Cedar Park, TX

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Aerospace

SpaceX Sr. Power Plant Engineer

Starbase, TX

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Aerospace

Relativity Space Senior Electro-Mechanical Engineer

Long Beach, CA

$132k–$198k / year

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Aerospace

Rocket Lab Mechanical Engineering Intern Spring 2027

Silver Spring, MD

$52k / year

Job type: Mechanical & Physical Systems
Seniority: Intern
Sector: Aerospace

Nvidia Principal Thermal Mechanical Photonic Designer

Santa Clara, CA

$232k–$368k / year

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Compute & Semiconductors

Blue Origin Thermal Engineer I - Early Career (2027 Starts)

Seattle, WA · Space Coast, FL · Huntsville, AL · Denver, CO

Job type: Mechanical & Physical Systems
Seniority: Entry-Level
Sector: Aerospace

Fervo Energy Completions Engineering Internship

Houston, TX

Job type: Mechanical & Physical Systems
Seniority: Intern
Sector: Energy & Climate

Aalo Atomics Senior Mechanical Design Engineer

Austin, TX

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Energy & Climate

Rivian Sr. CAE Engineer - Exterior Trims & Mechanisms

Irvine, CA

$122k–$152k / year

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Transportation

Radiant Senior Stress Engineer

El Segundo, CA

$134k–$185k / year

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Energy & Climate

Archer Lead Propulsion Systems Engineer – Special Programs

San Jose, CA

$138k–$190k / year

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Aerospace

Neuralink Mechanical Engineering Intern, Brain Interfaces

Austin, TX · South San Francisco, CA

$73k / year

Job type: Mechanical & Physical Systems
Seniority: Intern
Sector: Bio & Health

Helion Energy Materials Engineer

Everett, WA

$159k–$208k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Energy & Climate

Meta Hardware Research Engineer, Meta Robotics Studio

Redmond, WA

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: AI Research

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Frequently asked questions

How many mechanical & physical systems jobs are on BuildList?: There are currently 2,551 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.