Mechanical Engineer jobs in California

Relativity Space

Full-time · Long Beach, CA · $90,000 – $136,000

Relativity Space is seeking a recent graduate to join their Structures and Mechanisms team, working on the design, analysis, and testing of mechanisms for their Terran R rocket—including stage separation, landing gear, and deployment systems. This role suits someone who wants hands-on hardware ownership from concept through flight, thrives in a fast-moving environment, and is comfortable collaborating across engineering disciplines to solve problems at scale.

Listed on Relativity Space’s careers site · Apply there ↗

Eight Sleep

Full-time · San Francisco, CA · $100,000 – $130,000

Join Eight Sleep's hardware team as a mechanical engineer to design and develop the next generation of sleep fitness products from concept through mass production. This role suits engineers eager to own projects in a fast-paced startup, work across the full development lifecycle with cutting-edge sensors and actuators, and grow quickly in a mission-driven environment.

Listed on Eight Sleep’s careers site · Apply there ↗

Voyager

Full-time · Mojave, CA · $120,000 – $150,000

This role leads a team of mechanical engineers designing structures and mechanisms for lunar systems at an aerospace company. It suits experienced engineers who want to manage technical teams while staying hands-on with hardware design and analysis in a mission-critical space environment.

Listed on Voyager’s careers site · Apply there ↗

Tempo

Full-time · San Diego, CA · $186,000 – $206,900

This is a hands-on senior mechanical engineering role building thermochemical energy storage systems at a climate tech startup. You'll own complex hardware from concept through testing, mentor junior engineers, and work across CAD, simulation, fabrication, and high-temperature system design in a lean, mission-driven environment.

Listed on Tempo’s careers site · Apply there ↗

Astranis

San Francisco, CA · $1,925 / week

A twelve-week associate engineer position for recent graduates to design, build, and test satellite hardware and software alongside Astranis's full-time team on projects destined for orbit. The role suits mechanical or aerospace engineers eager to do meaningful hands-on work in a fast-paced aerospace environment.

Listed on Astranis’s careers site · Apply there ↗

Beckman Coulter

Full-time · Lodi, CA · $81,500 – $112,000

This role designs, troubleshoots, and improves automated manufacturing equipment and systems for a diagnostics company, focusing on mechanical reliability and continuous improvement. It suits engineers with manufacturing or equipment support experience who want hands-on work improving production systems in a shift-based, on-site environment.

Listed on Beckman Coulter’s careers site · Apply there ↗

NVIDIA

Full-time · Santa Clara, CA · $152,000 – $287,500

Lead the mechanical design of GPU and AI infrastructure systems at scale, from concept through production, focusing on chassis, thermal performance, and system integration. This role suits experienced mechanical engineers who thrive on solving complex hardware challenges and collaborating across electrical and manufacturing teams.

Listed on NVIDIA’s careers site · Apply there ↗

Boeing

Full-time · El Segundo, CA · $111,350 – $182,850

Boeing is hiring a mechanical engineer to design and analyze solar arrays and battery systems for satellites, working across government and commercial programs. This role suits mid-career or senior engineers with 5+ years of experience in solar array technologies who want to lead technical teams and drive spacecraft power system development.

Listed on Boeing’s careers site · Apply there ↗

Broadcom Inc.

San Jose, CA · $141,300 – $226,000

This is a principal-level mechanical engineering role focused on designing high-powered chassis and thermal solutions for ultra-high-performance electronics, requiring deep expertise in managing complex thermal and manufacturing challenges. The position suits experienced mechanical engineers comfortable with full lifecycle product ownership, cross-functional collaboration, and hands-on engagement with production and field validation.

Listed on Broadcom Inc.’s careers site · Apply there ↗

Terran Orbital

Full-time · Irvine, CA · $105,000 – $155,000

This role leads mechanical engineering design and development for satellite systems at a space technology manufacturer, requiring deep expertise in complex spacecraft mechanics from concept through production. It suits experienced engineers who want to own significant technical responsibilities in a fast-moving aerospace environment and have hands-on involvement in hardware realization.

Listed on Terran Orbital’s careers site · Apply there ↗

Agility Robotics

Full-time · Fremont, CA · $185,000 – $240,000

This role involves designing and scaling electromechanical subsystems for next-generation humanoid robots, with mentorship responsibilities for junior engineers. It suits experienced mechanical engineers with robotics background who can lead technical design work across mechanisms, electronics packaging, and power transmission while collaborating with cross-functional teams.

Listed on Agility Robotics’s careers site · Apply there ↗

Copper

Full-time · Berkeley, CA · $105,000 – $125,000

This role involves designing and developing mechanical systems for next-generation home appliances, taking products from initial concept through manufacturing. It suits engineers with 2–5 years of hardware experience who want hands-on involvement across the full product development lifecycle while collaborating with cross-functional teams.

Listed on Copper’s careers site · Apply there ↗

Crusoe

Full-time · San Francisco, CA · $145,000 – $165,000

Crusoe is seeking a mechanical engineer to design and oversee the installation of mechanical systems (HVAC, plumbing, fire protection) in their AI infrastructure data centers. This role suits engineers with 3–5 years of experience who want to contribute to large-scale industrial construction projects in the fast-growing AI compute sector.

Listed on Crusoe’s careers site · Apply there ↗

Shield AI

Full-time · San Diego, CA · $150,000 – $220,000

Shield AI seeks a mechanical engineer to lead battery system design for their X-BAT aircraft and related platforms, managing enclosure design, cell packaging, and manufacturing integration. This role suits someone who enjoys cross-functional collaboration and designing complex, performance-critical systems in a fast-paced defense-tech environment.

Listed on Shield AI’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $104,000 – $156,000

Design and develop structural components and assemblies for Terran R rockets, from initial concept through manufacturing support, with hands-on ownership of flight hardware. This role suits mid-level mechanical engineers who thrive in fast-paced environments and want to see their work directly impact a tangible product.

Listed on Relativity Space’s careers site · Apply there ↗

Astranis

Internship · San Francisco, CA · $1,925 / week

This is a twelve-week summer engineering role for recent mechanical engineering graduates to design, build, and test satellite hardware alongside Astranis's full-time team. It suits someone with hands-on experience building mechanical systems who wants to work on space technology at a company with real satellites in orbit.

Listed on Astranis’s careers site · Apply there ↗

AeroVironment

Full-time · Petaluma, CA · $122,500 – $187,000

This role leads mechanical design and analysis for aerospace electrical machines and packaging solutions that must survive extreme environments. It suits experienced mechanical engineers with deep expertise in rotating machinery, thermal management, and aerospace manufacturing who want to direct complex development projects.

Listed on AeroVironment’s careers site · Apply there ↗

Boeing

Full-time · Seal Beach, CA · $153,000 – $207,000

Boeing is seeking an experienced mechanical engineer to design and support flight control systems for out-of-production commercial aircraft, working on safety programs, modifications, and in-service problem resolution. This role suits someone with deep aerospace expertise who can manage complex system interactions and collaborate across multiple engineering disciplines.

Listed on Boeing’s careers site · Apply there ↗

Eight Sleep

Full-time · San Francisco, CA · $240,000 – $300,000

Lead the mechanical engineering and product design team for a sleep technology company's flagship consumer product and new hardware innovations. This role suits experienced engineering leaders with a track record of shipping complex electromechanical devices at scale who thrive in fast-paced, high-intensity environments.

Listed on Eight Sleep’s careers site · Apply there ↗

Agility Robotics

Full-time · Fremont, CA · $164,000 – $213,000

Senior mechanical engineer focused on designing and prototyping electromechanical subsystems for humanoid robots deployed in real-world logistics and manufacturing environments. This role suits experienced mechanical engineers comfortable with hands-on CAD work, fabrication, testing, and cross-functional collaboration on cutting-edge robotics projects.

Listed on Agility Robotics’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $132,000 – $198,000

A systems engineer role leading the design and integration of complex mechanical systems like thrust vector control for a commercial rocket program. This suits engineers with 5+ years in mechanical or electromechanical systems who want to own mission-critical hardware across full development cycles and collaborate with avionics and software teams.

Listed on Relativity Space’s careers site · Apply there ↗