Senior Mechanical Engineer – Energy Storage (Equity)

Capybara Energy; Woburn (MA); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

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

Job summary

Capybara Energy in the United States is seeking a Senior Mechanical Engineer to design and develop grid-scale energy storage hardware and ancillary systems from concept through manufacturing.

This hands-on role emphasizes product design, prototyping, and problem-solving. You will collaborate across disciplines and contribute to IP protection while guiding from prototyping to production. A strong background in manufacturability is required.

Qualifications

• Bachelor’s or Master’s degree in Mechanical Engineering or related field.
• 3+ years of experience in mechanical design and product development.
• 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.
• Collaboration across disciplines is essential.

Responsibilities

• Design, develop, and refine mechanical components and assemblies for 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 IP.
• Participate in design, brainstorming, and problem-solving with the broader engineering team.
• Contribute to internal design standards, tools, and documentation processes.

Skills

Teamwork

Problem solving

Manufacturing collaboration

Communication

Education

Bachelor’s or Master’s in Mechanical Engineering

Tools

CAD software

Finite Element Analysis

DFM/DFMA

Job description

Capybara Energy in the United States is seeking a Senior Mechanical Engineer to design and develop grid-scale energy storage hardware and ancillary systems from concept through manufacturing.

This hands-on role emphasizes product design, prototyping, and problem-solving. You will collaborate across disciplines and contribute to IP protection while guiding from prototyping to production. A strong background in manufacturability is required.