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  •  ...leader based in the United States, seeks an experienced mechanical engineer to own and drive platform development from concept through low...  ...create reliable, cost-effective systems, lead design reviews, prototype hardware, and support customer demonstrations. This role... 
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    Mosaic.tech

    Costa Mesa, CA
    3 days ago
  • $45 per hour

    Job Details Renewable Energy Mechanical Engineer I, Prototype & Vehicle Systems Cerritos,CA Posted:8/17/2026 Job Description Job ID#: 86835 Job Category: Renewable Energy Position Type: Contract Duration: 2-4 months Shift: 1 Motive Workforce is seeking an entry-level Mechanical... 
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    Hourly pay
    Contract work
    Immediate start
    Shift work

    Stefanini, Inc

    Cerritos, CA
    1 day ago
  • $125k - $175k

    SPACE EXPLORATION TECHNOLOGIES CORP seeks an Antenna Engineer for RF engineering on Starship vehicles. Responsibilities include designing antennas, building prototypes, and supporting communications systems. Candidates should have a Bachelor’s degree in an engineering... 
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    SPACE EXPLORATION TECHNOLOGIES CORP

    Hawthorne, CA
    4 days ago
  • SpaceX in Hawthorne, CA is seeking an Antenna Engineer for Starship. You will own RF engineering from concept to prototyping and production, designing antennas for wide frequency bands and coordinating with mechanical, production, and integration teams. The role emphasizes... 
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    VetJobs

    Hawthorne, CA
    4 days ago
  • Mach Industries located in Huntington Beach, CA is actively seeking a Mechanical Engineer to design and prototype advanced defense systems. The ideal candidate will have at least 1 year of mechanical engineering experience and proficiency in 3D modeling and CAD tools such... 
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    Mach Industries

    Huntington Beach, CA
    3 days ago
  • Helogen in Los Angeles, CA is seeking a Mechanical Engineer II to design and develop spaceflight bioinstrumentation hardware from concept...  ...and scale fabrication processes. You will design, analyze, prototype, test, and document electromechanical and microfluidic systems... 
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    Helogen

    Los Angeles, CA
    5 days ago
  • A confidential organization in Los Angeles seeks a practical mechanical engineer for a hands-on role focused on designing and fabricating innovative prototype systems. The ideal candidate will have over 5 years of experience in mechanical engineering, proficiency in machinery... 
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    Lumicity

    Los Angeles, CA
    4 days ago
  •  ...mobility OEM based in Anaheim, CA. The Entry Level Electric Vehicle Engineer will design and release mechanical components for LSVs and...  ...GEM and Taylor-Dunn lines. The role supports CAD design, prototype development, and documentation in a fast-paced team. Ideal candidates... 
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    Waev, Inc.

    Anaheim, CA
    1 day ago
  • Ccyp in Los Angeles seeks a bilingual R&D Mechanical Engineer (Chinese & English) to support next-gen server solutions. You will collaborate...  ...into robust mechanical designs. The role emphasizes hands-on prototyping, CREO CAD work, DFMs, BOM management, and on-site... 
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    Relocation

    Ccyp

    Los Angeles, CA
    1 day ago
  • Anduril Industries is seeking Mechanical Engineers for roles in Costa Mesa, CA, starting quarterly in 2026. The ideal candidates will design and build prototypes, analyze failures, and transition successful projects to production. Responsibilities include running analysis... 
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    Slope

    Costa Mesa, CA
    4 days ago
  • Liquid XR is seeking a Senior Mechanical Engineer in Los Angeles to own the physical architecture of platform hardware from concept to mass production. You will design, prototype, validate deformable interconnects and integrated systems for wearable devices, balancing elegance... 
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    Liquid XR

    Los Angeles, CA
    15 hours ago
  • Mach Industries in Huntington Beach, CA is seeking a New Grad Mechanical Engineer to design, prototype, and iterate on mechanical and electromechanical systems that support next-generation defense platforms. In this hands-on role, you’ll contribute to manufacturable hardware... 
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    Mach Industries

    Huntington Beach, CA
    1 day ago
  •  ...development company in Torrance, California is seeking a Mechanical Engineer to design and develop critical flight hardware. The ideal candidate will manage real flight hardware, contributing to rapid prototyping and integration efforts. A Bachelor's in Mechanical... 
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    Next Matter

    Torrance, CA
    4 days ago
  •  ...2819190Reference26-02612Job Title: (P100892 Perceived Quality Engineer)About Kyyba:Founded in 1998 and headquartered in Farmington Hills...  .... Lead issue identification and resolution efforts during prototype builds. Convert feasibility requirements into clear and actionable... 
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    Permanent employment
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    Kyyba

    Gardena, CA
    1 day ago
  • Motive Workforce is seeking an entry-level Mechanical Engineer to support prototype development and vehicle integration for locomotive electrification programs. This hands-on role connects mechanical design with prototype fabrication, testing, and shop-floor execution.... 
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    Motive Companies

    Cerritos, CA
    3 days ago
  • $26 - $38 per hour

    Dormont Manufacturing Co is seeking an Associate Mechanical Engineer to join their team in Gardena, California. The role involves direct contribution to the design and building of optical interconnect products and their manufacturing facilities. The ideal candidate should... 
    Hourly pay
    Flexible hours

    Dormont Manufacturing Co

    Gardena, CA
    4 days ago
  • Motive Workforce is seeking an entry-level Mechanical Engineer I to support prototype development and vehicle integration for locomotive electrification programs in Cerritos, CA. This hands-on role connects mechanical design with prototype fabrication, testing, and shop... 

    Stefanini, Inc

    Cerritos, CA
    1 day ago
  • A leading company is seeking an Engineering Assistant to support the Engineering Manager in product manufacturing process design. Key...  ...technician support. This role also involves troubleshooting and prototyping tasks crucial for product development. #J-18808-Ljbffr... 

    Interplace, Inc.

    Gardena, CA
    4 days ago
  • $100k - $130k

    A leading engineering consultancy in Los Angeles is seeking a full-time R&D Engineer. The position involves designing, prototyping, and testing wireless communication projects while working in a hybrid schedule. Ideal candidates should have a Bachelor's in Electrical Engineering... 
    Full time

    Keystone Distinction Group

    Los Angeles, CA
    4 days ago
  • The Advanced Manufacturing Company of America (Amca) is seeking a Mechanical Build Engineer to own the build procedures for qualification hardware, driving reliable production builds across our factories. You will perform hands-on R&D for new build methods, collaborate... 

    Industrious Ventures

    El Segundo, CA
    1 day ago
  • $95 - $145 per hour

     ...JOB TITLE: Principal Electronics Engineer LOCATION: Carson, CA PAY RATE: $95-145/hour We are a national aerospace...  ...customer requirements and validate designs through modeling, prototyping, and testing. Design and develop analog, digital, power... 
    Daily paid
    Long term contract
    Permanent employment
    Contract work
    Relocation

    The Structures Company

    Carson, CA
    3 days ago
  •  ...Job Description Job Description Electronics System Engineer   General Profile This Electronics System Engineer will be responsible...  ...design specifications. • Help building and testing prototypes; creating Acceptance Test Procedures (ATP); conducting, isolating... 
    Temporary work
    For contractors

    Simulator Product Solutions LLC, a division of Orbit Interna...

    Carson, CA
    13 days ago
  •  ...Project Engineer IIVitesse Systems is looking for a Project Engineer II to join the team in Harbor City, California! The Project Engineer...  ...failure modes, and recommend corrective actions.Support prototype development and iterative design improvements.Identify opportunities... 
    Permanent employment
    Temporary work

    Vitesse Systems

    Harbor City, CA
    12 hours ago
  • $26 - $38 per hour

     ...Associate Electrical Engineer (Intern / Co-Op)Gardena, CAAssociate Electrical EngineerMesh Optical Technologies was founded on the belief...  ...of various tests as we validate our optical interconnect prototypes and production processWork hands-on and alongside a multidisciplinary... 
    Internship
    Flexible hours

    Mesh Optical Technologies

    Gardena, CA
    11 hours ago
  • $120k - $150k

     ...performance and manufacturability bar. We are seeking an Electrical Engineer to design, validate, and debug high-speed PCB assemblies...  ...board bring-up, electrical validation, and lab debugging for prototype and production hardwarePerform signal integrity validation using... 
    Internship
    Relocation package
    Flexible hours
    Weekend work

    Mesh Optical Technologies

    Gardena, CA
    11 hours ago
  •  ...to capitalize on already overwhelming demand.As an electrical engineer you will own the design, manufacturing, and integration of the...  ...high-mix, low-volume aerospace productionExperience with rapid prototyping, in-house assembly, and validation test campaign.Prior work in... 
    Permanent employment

    Singularity Defense

    Gardena, CA
    12 hours ago
  • $94.23k - $148.07k

     ...reinvent in-flight experience. In the role of Senior Electronics Engineer, you'll play a pivotal part on our Engineering team. The Sr....  ...customer requirements and validate them by analysis/modeling/prototyping or based on previous product performanceCreate and maintain hardware... 
    Local area
    Worldwide

    Safran

    Carson, CA
    2 days ago
  •  ...in El Segundo, made up of former SpaceX, Anduril, and Lockheed engineers, to develop and mass produce life-saving systems. Backed by...  ...with a strong design and testing background. You will design, prototype, analyze, and test complex vehicle components and systems for... 
    Permanent employment
    Immediate start

    Singularity Defense

    Gardena, CA
    12 hours ago
  •  ...to capitalize on already overwhelming demand.We are seeking a skilled mechanical design engineer with a strong background in designing ground structures. You will design, prototype, analyze, test, and develop manufacturing processes for complex ground systems integral... 
    Permanent employment
    Weekend work

    Singularity Defense

    Gardena, CA
    12 hours ago
  • $120k - $150k

     ...production data infrastructure. We are seeking a Manufacturing Engineer to design, build, and scale the physical systems that make...  ...volume productionBuild, test, and debug production equipment and prototype hardware on the factory floorAnalyze yield, process, and metrology... 
    Internship
    Relocation package
    Flexible hours
    Weekend work

    Mesh Optical Technologies

    Gardena, CA
    13 hours ago