Jobs/Roles/Mechanical & Physical Systems

Mechanical & Physical Systems Jobs

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

2,544 open roles · Updated Sep 22, 2026

2,544 jobs

Shield AI Aerodynamics & Performance Engineer (R5732)

Dallas, TX

$115k–$175k / year

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

ICON Mechanical Engineer II, Defense R&D Programs

Austin, TX

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

K2 Space Senior Thermal Control System (TCS) Design Engineer

Los Angeles, CA

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

True Anomaly Thermal Engineer (Senior or Staff)

Denver, CO · Long Beach, CA

$160k–$285k / year

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

Saronic Mechanical Engineer - Special Programs

Austin, TX

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

Castelion Senior Mechanical Design Engineer (RF Systems & Radomes)

Rio Rancho, NM

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

PhysicsX CFD Engineer

United Kingdom

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

Impulse Space Senior Manager, Propulsion Systems

Redondo Beach, CA

$175k–$200k / year

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

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Zipline Aerodynamics Intern (Summer 2027)

South San Francisco, CA

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

CesiumAstro Senior Mechanical Engineer

Melbourne, FL

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

Ursa Major Senior Propulsion Engineer, Fluid & Mechanical Systems

Berthoud, CO

$121k–$152k / year

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

Cowboy Space Corporation Engine Lead

Kent, WA · Washington, D.C.

$250k–$285k / year

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

Singularity Mechanical Engineer (Processes)

Gardena, CA

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

Boom Supersonic Build Engineer (Sign On Eligible)

Centennial, CO

$107k–$144k / year

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

Harmattan AI Simulation / FEA Engineer

Switzerland

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

CHAOS Industries Mechanical Engineer

El Segundo, CA

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

Fluidstack Designer/Detailer (Mechanical/Structural), Modular R&D

Austin, TX · New York, NY · San Francisco, CA · Los Angeles, CA · Seattle, WA

$208k–$263k / year

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

Commonwealth Fusion Senior Mechanical Engineer – Cable Magnets

Devens, MA

$110k–$185k / year

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

Inversion Principal TPS Materials Engineer

Playa Vista, CA

$175k–$244k / year

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

Varda Space Propulsion Engineer II - Hardware and Bus Systems

El Segundo, CA

$120k–$153k / year

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

SpaceXAI Civil Engineer, SpaceXAI Battery Storage - Memphis

Memphis, TN

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

Slate Auto Senior Vehicle CAE Engineer

Troy, MI

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

Hermeus Propulsion Engineering Intern - Spring/Summer/Fall 2027

Los Angeles, CA

$52k–$69k / year

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

Rivan General Engineering Intern

United Kingdom

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

Firefly Aerospace Flight Dynamics Engineer III (Trajectory), Spacecraft

Cedar Park, TX

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

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How many mechanical & physical systems jobs are on BuildList?: There are currently 2,544 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.