Jobs/Roles/Mechanical & Physical Systems

Mechanical & Physical Systems Jobs

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

2,593 open roles · Updated Sep 23, 2026

2,593 jobs

Cowboy Space Corporation Lead Propulsion Analyst

Kent, WA · Washington, D.C.

$150k–$200k / year

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

Harmattan AI Mechanical Engineer - GCS

France

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

Fluidstack Mechanical Engineer, Demand Management

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 Staff Multiphysics Modeler

Devens, MA

$130k–$200k / year

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

Varda Space Propulsion Engineer II - Ground Fluids

El Segundo, CA

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

Inversion Senior Avionics Mechanical Engineer

Playa Vista, CA

$137k–$193k / year

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

SpaceXAI Structural Engineer, Data Centers - Memphis

Memphis, TN

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

Hermeus Aerodynamics Engineer

Los Angeles, CA

$92k–$140k / year

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

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Aalo Atomics Senior Reactor Operator

Idaho Falls, ID

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

Firefly Aerospace Principal Fluid Systems Engineer

Cedar Park, TX

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

SpaceX Sr. Power Plant Engineer

Starbase, TX

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

Relativity Space Staff Avionics Mechanical Engineer

Long Beach, CA

$150k–$226k / year

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

Rocket Lab Mechanical Engineering Intern Spring 2027

Long Beach, CA

$58k / year

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

Nvidia Senior Simulation Mechanical Engineer

Israel

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

Oklo Piping Designer / Drafter - Fuel Recycling

Remote · Santa Clara, CA

$80k–$130k / year

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

Blue Origin Structural Engineer - Large Steel Structures (multiple levels)

Space Coast, FL

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

Fervo Energy Operations Engineering Internship

Houston, TX

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

Rivian Sr. Manufacturing Engineer - Paint

Normal, IL

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

Archer Staff Mechanical Design Engineer - (SJ2026AC)

San Jose, CA

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

Radiant Senior Nuclear Engineer

El Segundo, CA

$134k–$185k / year

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

General Matter Specialist Lab Piping Designer (Buildings)

Los Angeles, CA

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

Meta Opto-Mechanical Engineer, Camera

Sunnyvale, CA

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

Helion Energy Principal Nuclear Materials Engineer

Everett, WA

$264k–$317k / year

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

Sierra Space Propulsion Engineer II

Madison, WI

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

Joby Aviation Staff Rotor/Hub Design Engineer

Santa Cruz, CA

$150k–$250k / year

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

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How many mechanical & physical systems jobs are on BuildList?: There are currently 2,593 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.