Engineering

Senior Mechanical Engineer

Capybara Energy

Woburn · Ma · United States

Mechanical Engineer wanted for a groundbreaking journey to develop grid-scale energy storage technology. Average pay. Demanding hands‑on work, intense challenges, relentless problem‑solving. Failure possible. Honor and recognition if successful.

Pay: $90,000.00 - $120,000.00 per year

Senior Mechanical Engineer - Product and system design

About the Role:

We’re looking for a rockstar Engineer to design and develop an energy storage technology and ancillary systems.

* Please note that this position requires previous experience in direct involvement in the design and commercialization of a physical product.

This is a hands‑on role, ideal for an engineer who enjoys product design, prototyping, and problem‑solving. You’ll work closely with our team to bring innovative, real‑world products from design to manufacturing.

Key Responsibilities:

  • Design, develop, and refine mechanical components and assemblies for our energy storage hardware.
  • Collaborate with engineers and scientists to document and improve designs.
  • Support the full product lifecycle; from concept and prototyping to validation, testing, and production.
  • Troubleshoot design and performance challenges with creativity and technical precision.
  • Oversee fabrication, testing, and performance evaluation.
  • Conduct FEA simulations, tolerance analyses, and material selection for optimized designs.
  • Bring creative, practical solutions to complex engineering challenges and help protect key IP.
  • Participate in design, brainstorming, and problem‑solving with the broader engineering team.
  • Contribute to internal design standards, tools, and documentation processes.

Qualifications:

  • Bachelor’s or Master’s degree in Mechanical Engineering or related field.
  • 3+ years of experience in mechanical design and product development.
  • Demonstrated experience designing and launching a physical product (UL listed or outdoor rated preferred).
  • Strong understanding of manufacturing principles and process optimization.
  • Proficiency in CAD software, structural analysis, and DFM.
  • Solid understanding of materials, manufacturing processes, and design for manufacturability.
  • Strong technical, creative, and troubleshooting skills.
  • This role requires close collaboration across disciplines, so teamwork and communication are essential.

Preferred Skills:

  • Knowledge of electronics integration or mechatronics.
  • Experience working in regulated or safety‑critical environments.
  • DFMA
  • Experience coordinating with contract manufacturers or large‑scale production partners.

What We Offer:

  • Equity
  • Company funded HSA
  • 3 weeks paid time off
  • Sick pay & parental leave
  • 10 paid holidays
  • Health and dental insurance
  • 401(k) match
  • Advanced snacks

* U.S. citizenship or lawful permanent resident status is required due to federal contract requirements.

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Reference: WJ-4881_8053948

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