37 prototype engineer jobs at 32 companies in Plainfield, CT
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Sensor Solutions Prototype Engineer Sr (Hartford, CT, US)
Hartford, Connecticut, United States
OnsiteFull Time
7+ YOE7+ years engineering experience; 3+ years field testing; 3+ years project management; IoT and sensor technology; engineering programming experience preferred; PE license preferred; Bachelor’s in Engineering; Masters preferred.
IoT, Sensor technology, Engineering software
1mo
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Sr. Mechanical Engineer
Rumford, Rhode Island, United States
$150k-$185k/yr HybridFull Time
6+ YOE6+ years mechanical engineering experience, SolidWorks proficiency, hands-on prototyping and testing, system integration experience, Bachelor's in Mechanical Engineering, U.S. citizenship and eligibility for Secret clearance.
SolidWorks, CAD
1w
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Mechanical Engineer
Middletown, Rhode Island, United States
OnsiteFull Time
2+ YOEB.S. in Mechanical Engineering, 2+ years experience, SolidWorks proficiency, US citizenship and ability to obtain SECRET clearance, experience with prototype assembly, GD&T, and test hardware.
SolidWorks
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Sr Mechanical Engineer
Minneapolis or Providence
HybridFull Time
3+ YOEBachelor's in Mechanical Engineering, 3+ years medical device development experience, CAD and prototyping proficiency, familiarity with FDA/QSR/ISO, strong communication and analytical skills.
3D CAD, 2D CAD
3mo
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Design Engineer Internship - Fall 2026
Bloomfield or Suffield
OnsiteInternship
0+ YOEPursuing mechanical engineering; strong SolidWorks; hands-on prototyping; problem-solving; US person preferred.
SolidWorks, CAD
2mo
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Electrical Engineer
Groton, Connecticut, United States
$100k-$110k/yr OnsiteFull Time
5+ YOEMid-senior electrical engineer with 5-10 years' experience, BSEE, US citizenship, secret clearance, PCB/CCA design and fabrication, KiCAD/Gerber/CAD experience, prototyping and test procedure development.
KiCAD, Gerber, CAD
3w
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Mechanical Engineer
Southborough, Massachusetts, United States
$80k-$115k/yr OnsiteFull Time
0+ YOEBS/MS in mechanical engineering preferred,0–6 years experience,mechanical design,fixturing,prototyping,hands-on fabrication,CAD proficiency,ability to balance speed/precision/cost,some R&D or manufacturing experience.
CAD
6d
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Sr. Mechanical Engineer
North Kingstown, Rhode Island, United States
OnsiteFull Time
8+ YOE8+ years mechanical engineering experience building electro-mechanical consumer or commercial products; hands-on prototyping, experiment design, SolidWorks proficiency, and ability to integrate mechanical and electronic systems required.
SolidWorks, CFD
2mo
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Mechanical Engineer II
Framingham or Mexico or Europe or Asia
$81k-$111k/yr OnsiteFull Time
3+ YOEBachelor's in mechanical engineering, 3-7 years' product development experience, strong mechanical design and materials knowledge, NX CAD experience, familiarity with SolidWorks and Windchill, prototype testing and manufacturing collaboration skills.
NX, SolidWorks, Windchill
3w
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Hardware Engineer - PWA / PWB Design
Carlsbad or Marlborough
$105k-$165k/yr OnsiteFull Time
2+ YOE2+ years hardware engineering experience; bachelor’s in electrical engineering or equivalent; high-speed board design up to 10GbE; prototyping, DFM, test and supplier coordination; US citizenship and ability to obtain SECRET clearance.
Mentor Graphic DxDesigner, Expedition/Planner, Hyperlynx
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R&D Mechanical Engineer
Wallingford, Connecticut, United States
$90k-$115k/yr OnsiteFull Time
3+ YOE3+ years R&D mechanical engineering experience, SolidWorks and 3D-CAD proficiency, hands-on prototyping and shop experience, FEA/DFSS analytical skills, Microsoft Office proficiency, BSc/MSc in Mechanical or Electrical Engineering, strong English communication.
3D-CAD, SolidWorks, 3D printers, Microsoft Excel, Microsoft PowerPoint, Microsoft Outlook, Microsoft Word, FEA, Design for Six Sigma
1w
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Sr. Robotics Mech Engineer, Velocity
Westborough, Massachusetts, United States
$137k-$186k/yr OnsiteFull Time
8+ YOEBachelor's degree in engineering,8+ years mechanical engineering experience,prototyping and scaling experience,design verification and test development,FEA/GD&T knowledge,3D CAD skills,and mentoring experience.
3D CAD, Geometric Dimensioning and Tolerancing (GD&T), Finite Element Analysis (FEA), SolidWorks, Ansys
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Senior Mechanical Engineer (Tolland, US)
Tolland, Connecticut, United States
OnsiteFull Time
5+ YOEBachelor's in Mechanical Engineering (or related), minimum 5 years mechanical engineering experience (R&D preferred), strong CAD proficiency (NX; Windchill/Creo a plus), experience with prototyping, testing, FMEA/DFA/DFM, and cross-functional collaboration.
NX, Windchill, Creo
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FPGA/Hardware Engineer (Hardware Engineer, Staff)
Marlborough, Massachusetts, United States
$130k-$170k/yr OnsiteFull Time
8+ YOEBachelor's in Electrical Engineering (8+ years experience); FPGA development (VHDL/Verilog), Altium, SPICE, Xilinx Zynq/Vivado, analog circuit design, prototype debugging, and ability to obtain DoD security clearance; US export/ITAR eligibility.
Altium, Git, SPICE, Xilinx Zynq, Vivado, VHDL, Verilog, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, oscilloscope, logic analyzer, power supply
5d
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Senior Engineer, Product Development Engineering
Franklin, Massachusetts, United States
$95k-$116k/yr OnsiteFull Time
5+ YOEBachelor's degree in mechanical engineering, 5+ years of experience, air filter design and HVAC knowledge, CAD, prototyping, vendor coordination, analytical testing, and cross-functional communication skills.
Computer-aided design (CAD), HVAC, Minitab, SolidWorks, CFD, FEA
1w
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Principal R&D Structural Engineer
Northborough, Massachusetts, United States
$111k-$177k/yr HybridFull Time
5+ YOEPE license required, advanced degree plus experience preferred, 5+ years structural engineering/building design, knowledge of codes (IRC/IBC/ASTM/NFPA), prototyping and prefabrication experience, 3D CAD/BIM skills, strong communication and project management.
SolidWorks, Fusion 360, Rhino, Revit, Cadwork, Vertex BD
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Engineer I, Test
East Longmeadow, Massachusetts, United States
$60k-$97k/yr OnsiteFull Time
1+ YOE1+ years relevant experience; hands-on testing and supplier qualification; experience with measurement/metallurgical/metrological devices; CAD experience (Catia preferred); able to create prototypes, test plans, and technical reports.
CAD, Catia
1mo
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AI Solutions Engineer - JobID-0230
Arlington or Mount Laurel or San Diego or Fall River
$90k-$184k/yr OnsiteFull Time
3+ YOE3+ years technical experience; BS in CS/Data Science/Engineering or equivalent; U.S. citizenship and ability to obtain/maintain Secret clearance; strong experience with LLMs/generative AI, prototyping, secure software practices, and stakeholder collaboration; up to 10% travel.
LLMs, generative AI, MLOps, DevSecOps, CI/CD, Aegis, SSDS, SLQ-32, NIST 800-53, DISA STIGs, Risk Management Framework
1w
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ELECTROMECHANICAL DESIGNER/ENGINEER
Newport or Middletown or Fall River
OnsiteFull Time
5+ YOEAbility to design and document electromechanical systems, develop PCB and cable harness designs, build and test prototypes, obtain/maintain SECRET clearance, and use SolidWorks/OrCAD; minimum 5 years relevant experience.
SolidWorks, SolidWorks PDM, CircuitWorks, OrCAD
2mo
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Senior Electromechanical Product Developmen Engineer - Medical Devices
Foxborough, Massachusetts, United States
$100k-$140k/yr OnsiteFull Time
Bachelor's in Mechanical, Electrical or Biomedical Engineering; medical device design experience; SolidWorks; Arduino/prototyping; FDA QSR/ISO knowledge; ability to take products from concept to market.
SolidWorks, Arduino, PCB design, soldering, wiring, software validation
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