Demo

Sr./Staff Mechanical Design Engineer

HEN Technologies
Hayward, CA Full Time
POSTED ON 12/12/2025
AVAILABLE BEFORE 6/9/2026

About HEN

HEN Technologies is a deep-tech company building the world’s first end-to-end intelligent fire suppression ecosystem, powered by AI, IoT, and advanced fluid dynamics. The company’s mission is to modernize how the world prevents and responds to fires by replacing outdated, manual systems with connected, data-driven technology that is more water-efficient and intelligently coordinated across every layer of the fireground. Backed by funding from Venture Capital investors, HEN Technologies is proving that the future of fire defense is intelligent, connected, and preventative. 


Join us as we redefine one of the world’s most critical industries.


Role Description

HEN is constantly innovating new products to revolutionize the firefighting industry, and we’re seeking a Sr./Staff Mechanical Design Engineer to add to our small but growing product development team. As HEN expands its product portfolio we’re looking to add an ME with a diverse skill set - spanning mechanical design, rapid prototyping, and familiarity with electro-mechanical systems. You will concentrate on transforming concepts into detailed mechanical designs, prioritizing design for manufacturing and assembly. Your work will span all phases of the design cycle, from defining requirements to prototyping, testing, and refining designs. You’ll leverage in-house prototyping capabilities for rapid iterations and validate your designs through experimentation; then work directly with manufacturing to bring the product to market. A hands-on learner and someone proficient in rapid design and prototyping will thrive in this role. 


What you'll do:

  • Lead the design, prototype, and validation testing of new firefighting equipment (nozzles, shutoffs, enclosures, etc.)
  • Responsible for electromechanical design of HEN products
  • Collaborate with vendors to mass manufacture components
  • Continuous improvement of current product portfolio
  • Hands-on collaboration with manufacturing to bring new products online
  • Develop internal test protocols, equipment, and carry-out proof-of-concept tests
  • Support design and testing through documentation


What you'll bring:

  • Degree in Mechanical Engineering or related field; Bachelor's with 4 years, 
  • Experience designing components for implementation in high-volume production
  • Proficiency in CAD, Solidworks experience desired
  • Familiarity with embedded electrical systems desired
  • Strong fundamentals in fluid dynamics and material science
  • Strong understanding of rugged industrial grade design.
  • Solid fundamentals of Design for Reliability (Shock/Vibration/Thermal)
  • Familiarity with range of manufacturing and prototyping techniques
  • Ability to thrive in a fast-paced startup environment
  • Authorization to work in the US


Nice-to-have:

· Experience with microcontroller-based system design

· Familiarity with valves, pumps, pressure-flow systems

Salary.com Estimation for Sr./Staff Mechanical Design Engineer in Hayward, CA
$117,004 to $141,157
If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Sr./Staff Mechanical Design Engineer?

Sign up to receive alerts about other jobs on the Sr./Staff Mechanical Design Engineer career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$108,186 - $133,193
Income Estimation: 
$134,236 - $174,128
Income Estimation: 
$132,162 - $161,329
Income Estimation: 
$85,954 - $106,408
Income Estimation: 
$106,299 - $135,354
Income Estimation: 
$108,186 - $133,193
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Not the job you're looking for? Here are some other Sr./Staff Mechanical Design Engineer jobs in the Hayward, CA area that may be a better fit.

  • rondoenergy Alameda, CA
  • We are looking for a highly skilled Staff Mechanical Design Engineer to join our Core Technology team focused on high-temperature, high voltage energy stor... more
  • 1 Month Ago

  • Form Energy Berkeley, CA
  • Are you ready to build America’s energy future? Form Energy is an American manufacturing and energy technology company. We’re revolutionizing energy storag... more
  • 1 Day Ago

AI Assistant is available now!

Feel free to start your new journey!