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135 prototyping engineer jobs at 65 companies in Riverside, CA

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Senior Research and Prototyping Engineer
Los Angeles, California, United States
OnsiteFull Time
Arcturus
Arcturus: Develops carbon nanomaterial-infused metal composites for high-performance conductors.
3+ YOEHands-on prototyping and hardware engineering; CAD design; electrical test support; strong documentation.
CAD (Onshape), Machining, 3D Printing, Sensors, DAU/data acquisition, Basic electronics, Lab instrumentation
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1w
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Applications Engineer - FPGA Prototyping
San Diego or Austin or Boulder or Costa Mesa or Pasadena or Tempe or Wilsonville or Fremont
$167k-$334k/yr HybridFull Time
Siemens
SiemensXETRA: SIE: Manufactures industrial automation, infrastructure, and energy technology systems.
5+ YOE5+ years in design/verification/FPGA/ASIC or similar; BS/MS in EE/CE/CS; active experience with SystemVerilog/Verilog/VHDL, FPGA tools, scripting, simulation and customer-facing technical support.
SystemVerilog, Verilog, VHDL, SystemC, C/C++, Perl, Python, XML, JSON, proFPGA, HAPS, Xilinx Vivado, Altera Quartus, Questa, Incisive, VCS, OVM, UVM
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Mechanical Engineer III
Irwindale, California, United States
$100k-$140k/yr OnsiteFull Time
Georg Fischer
Georg FischerSIX Swiss Exchange: GF: Manufacturer of piping, casting, and machining solutions.
5+ YOESenior mechanical/electrical/mechatronics engineer with 5+ years in product development, sensor/automation experience, CAD design, prototyping, and cross-disciplinary collaboration.
Siemens NX, SolidWorks, Microsoft Office, 3D printing, Rapid prototyping, PLC programming, electromechanical assembly, sensors
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3mo
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Design Engineer II
Rancho Santa Margarita, California, United States
$75k-$95k/yr OnsiteFull Time
Applied Medical
Applied Medical: Manufacturer of advanced medical devices and surgical products.
2+ YOETwo–three years mechanical/product design engineering; Bachelor’s in related field; CAD (SolidWorks); GD&T; prototyping; technical writing; cross‑functional teamwork.
SolidWorks, CAD, Geometric Dimensioning and Tolerancing, Prototyping, Documentation
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Mechanical Engineer
Long Beach, California, United States
$175k-$200k/yr HybridFull Time
Critical Loop
Critical Loop: Provides mobile battery energy storage and management software systems.
Mid-senior mechanical engineer with end-to-end design experience, proficient in 3D CAD, prototyping, field/lab work, and cross-functional collaboration.
3D CAD, SolidWorks, CREO, Fusion 360
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Manufacturing Engineer, Barracuda
Costa Mesa, California, United States
$129k-$171k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
5+ YOEDegree in engineering or hard sciences; 5+ years in manufacturing/prototyping; security clearance eligibility; strong quality and fabrication experience.
MBOM, PCBA, SMT, Soldering, Fabrication, CNC
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Electronics Engineer
Pasadena, California, United States
OnsiteFull Time
Caltech
Caltech: Provides university-level education and scientific research services.
4+ YOEB.S. in electronics engineering (or 4 years equivalent), experience with electronic circuits, microcontroller programming, soldering/prototyping, testing procedures, strong communication and organizational skills.
Arduino, SolidWorks, Altium
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Manufacturing Engineer
Victorville, California, United States
$85k-$170k/yr OnsiteFull Time
Mach Industries
Mach Industries: Designs and manufactures autonomous unmanned aerial vehicles for defense.
1+ YOE1+ years in mechanical engineering with focus on designing/prototyping mechanical systems; strong CAD (NX/SolidWorks); programming (Python, MATLAB, C++); Bachelor in Mechanical, Aerospace, or Electrical Engineering; hands-on hardware development experience.
NX, SolidWorks, Python, MATLAB, C++
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Mechanical Engineer III
Irwindale, California, United States
$100k-$140k/yr OnsiteFull Time
Georg Fischer
Georg FischerSIX Swiss Exchange: GF: Manufacturer of piping systems and industrial flow solutions.
5+ YOEBachelor’s or Master’s degree in Mechanical Engineering, Electrical Engineering, Mechatronics; 5+ years in product development, preferably sensors and automation; CAD (Siemens NX or SolidWorks); prototyping and assembly experience.
Siemens NX, SolidWorks, Microsoft Office, 3D printing, PLC programming, Sensors
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Mechanical Engineer II
Brea, California, United States
$97k-$105k/yr HybridFull Time
RAVE Aerospace
RAVE Aerospace: Developing in-flight entertainment and connectivity systems for airlines.
3+ YOEBachelor's in Engineering (or equivalent), 3+ years engineering experience, CAD design and mechanical drawing, prototyping/validation, testing and fixture design, fabrication/assembly experience, cross-functional collaboration.
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Product Development Engineer
Los Angeles, California, United States
$78k-$88k/yr OnsiteFull Time
Spin Master
Spin MasterTSX: TOY: Designs and manufactures toys and children's entertainment content.
2+ YOEDesign and engineer toy/product portfolios from concept to production; prototyping; manufacturing support; cost and performance optimization; travel.
PLM tools
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2w
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Design Engineer
Aliso Viejo, California, United States
$82k-$103k/yr OnsiteFull Time
Cervélo
Cervélo: Designs and manufactures high-performance racing and triathlon bicycles.
1+ YOEDegree in engineering or industrial design or equivalent experience, 1–3 years product design experience, CAD and prototype experience, proficiency with Microsoft Office, strong communication and collaboration skills.
CAD, SolidWorks, Microsoft Excel, Microsoft PowerPoint, Microsoft Word, Adobe Illustrator, Adobe InDesign, KeyShot, PhotoView 360, Alias, Rhino
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Senior Engineer, Special Projects
Irvine or Plymouth or Normal
$108k-$135k/yr OnsiteFull Time
Rivian
RivianNASDAQ: RIVN: Designs and manufactures electric vehicles and charging networks.
Bachelor's in engineering or equivalent; hands-on prototype design and fabrication experience; CAD (Catia) proficiency; knowledge of vehicle systems, materials, and low-volume manufacturing; welding and machining skills a plus.
Catia, CAD
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Manufacturing Engineer Intern
Santa Fe Springs, California, United States
$20/hr OnsitePart Time
RD Rubber Technology Corporation
RD Rubber Technology Corporation: Manufacturer of custom precision molded rubber components.
Internship requiring familiarity with engineering calculations, CAD modeling, prototyping, manufacturing processes, and the ability to prepare reports and support continuous improvement projects; hands-on manufacturing experience preferred.
CAD
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Senior Mechatronics Engineer
Denver or Charleston or Phoenix or Houston or Reading or Baton Rouge or Monrovia
$135k-$199k/yr HybridFull Time
Worley
WorleyAustralian Securities Exchange: WOR: Global professional services for energy, chemicals, and resources sectors.
7+ YOEBachelor's in engineering, 7+ years mechatronics/robotics experience, expertise in CAD, embedded systems, PLCs, sensors, and programming (Python, C++, MATLAB); proven project leadership and prototype testing experience.
SolidWorks, AutoCAD, Python, C++, MATLAB, Simulink, ROS, Gazebo, Nvidia Isaac Sim, PLCs
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Senior Mechanical Design Engineer
Los Angeles, California, United States
$150k-$180k/yr OnsiteFull Time
LettrLabs
LettrLabs: Designs and builds handwriting robotics and production automation systems for direct mail manufacturing.
5+ YOE5+ years mechanical design experience; bachelor’s in mechanical engineering; hands-on with motion systems, sheet metal, DFM/DFA, FEA, prototyping, vendor collaboration, and mentorship of junior engineers.
SolidWorks, NX, CAD, PDM, PLM, FEA, GD&T (ASME Y14.5)
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Mechanical Engineer II
Laguna Hills, California, United States
$80k-$100k/yr OnsiteFull Time
Sonendo
SonendoOTCQX: SONX: Medical technology transforming dentistry through innovative device systems.
2+ YOEBachelor's in Mechanical Engineering with 2+ years experience (or advanced degree), skilled in mechanical design, 3D CAD modeling, prototyping, testing, design control in regulated industries, DOE exposure, and risk management.
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Electrical Engineer (Lasercom)
Los Angeles, California, United States
$140k-$170k/yr HybridFull Time
Observable Space
Observable Space: Developing integrated hardware and software for persistent space observation.
2+ YOE2+ years electrical engineering experience; PCB design, wire harnessing, circuit simulation, signal integrity, and prototype bring-up; experience with Altium and LTSpice; strong debugging and EMI/EMC knowledge.
Altium, LTSpice, Hyperlynx, SIwave, ADS, HFSS, Oscilloscope, Logic Analyzer, Spectrum Analyzer, Multimeter
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Principal Mechanical Engineer
El Segundo or Los Angeles
$175k-$215k/yr OnsiteFull Time
CHAOS Industries
CHAOS Industries: Develops advanced radar and sensing systems for modern defense.
8+ YOEBachelor's in Mechanical Engineering, 8+ years platform-level mechanical design and system integration for aerospace/defense, SolidWorks and FEA experience, prototyping skills, MIL‑STD familiarity, and ability to obtain a U.S. security clearance.
SolidWorks, NASTRAN, ABAQUS, ANSYS, COMSOL
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Applied AI Engineer
Los Angeles, California, United States
$100k-$200k/yr OnsiteFull Time
General Matter
General Matter: Produces enriched uranium and nuclear fuel for power generation.
BS or higher in engineering, physics, chemistry, applied math, or related technical field; proficiency in Python; experience building AI tools; strong AI and engineering fundamentals; ships prototypes; able to work across neutronics, safety, data, and manufacturing.
Python, AI tooling, LLMs, AI agents
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