Junior Product Design Engineer

Stealth Battery Startup

$80K — $95K *
Manufacturing & Automotive
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • B.S. in Mechanical Engineering or related field, or equivalent hands-on experience with technical diploma.
  • 3+ years of mechanical design experience in product, structures, or custom machinery.
  • Proficient in 3D CAD software (such as SolidWorks or Inventor).
  • Experience in producing 2D drawing packages with knowledge of GD&T and tolerance analysis.
  • Familiar with manufacturing methods like machining and welding that inform design.
  • Strong communication skills and ability to thrive in fast-paced development environments.

Responsibilities

  • Support design of structural components for high-voltage battery packs under various constraints.
  • Create and iterate complex 3D CAD models while engaging in design trade-offs with senior engineers.
  • Apply Design for Manufacturing/Assembly (DFM/DFA) principles in part and assembly design.
  • Produce detailed 2D drawings with GD&T and support tolerance studies.
  • Guide design development through simulations when CAE resources are limited.
  • Design fixtures and test setups for validating proof-of-concept builds and prototype manufacturing.
  • Collaborate with manufacturing teams to optimize assembly processes and resolve issues.

Benefits

  • Work on innovative energy storage technology to power a sustainable future.
  • Dynamic career growth with opportunities in a rapidly expanding industry.
  • Comprehensive health and wellness benefits, including professional development.
  • Join a mission-driven culture focused on innovation and excellence in sustainable energy solutions.
Full Job Description
Role

We are seeking a Mechanical Design Engineer to support the design and development of structural battery hardware (e.g., enclosures, trays, lids/covers) and/or provide engineering support equipment (fixtures, test-bucks, test setups, and prototype/demo manufacturing equipment).

You'll work closely with senior engineers and cross-functional partners (analysis, test, manufacturing) to translate concepts into hardware that meets performance, reliability, and manufacturability needs.

Responsibilities

Mechanical Design & Product Development
  • Support design of structural components for HV battery packs such as enclosures, trays, covers, and related brackets/interfaces under thermal, mechanical, and environmental constraints
  • Create and iterate 3D CAD models and assemblies; contribute to design trades (weight, stiffness, cost, manufacturability) with guidance from senior engineers.
  • Apply DFM/DFA fundamentals in part and assembly design (fasteners, sealing concepts, stack-ups, serviceability).
  • Produce 2D drawings with clear notes, basic GD&T, and manufacturing intent; support tolerance studies as needed.
  • Provide directional guidance through simulations to steer the design and architecture when dedicated CAE resources are limited.
  • Develop comprehensive 2D drawing packages applying appropriate GD&T and conduct tolerance analyses to ensure assembly integrity and performance.

Fixtures, Bucks, and Prototype/Test Equipment
  • Design and develop fixtures, bucks, test setups, and prototype/demo pack manufacturing equipment to support proof-of-concept builds and validation.
  • Help maintain and improve existing fixture designs (updates, repairability, usability, documentation).
  • Work with standard fixturing components and vendor catalogs; select appropriate hardware and mechanisms.

Hands-On Build Support & Collaboration
  • Partner with manufacturing/shop resources during fabrication, prototype builds, and assembly debug-bringing a "design it, build it, improve it" mindset.
  • Coordinate with suppliers for quotes, DFM feedback, and part delivery; assist with incoming inspection and fit/function checks.
  • Support test activities (vibration/structural/environmental) and document findings; assist in root-cause investigations and corrective actions.

Validation & Testing
  • Support component and system-level validation, including vibration, structural, and environmental testing.
  • Support in validation, durability, and abuse testing activities to ensure performance and reliability.
  • Drive root-cause analysis and corrective actions for mechanical performance issues.

Qualifications
  • B.S. in Mechanical Engineering (or related), or a technical diploma in Mechanical Technology/CAD with equivalent hands-on experience.
  • 3+ years of mechanical design experience (product, structures, automation equipment, fixtures, or custom machinery).
  • Proficiency in 3D CAD (SolidWorks, Inventor, NX, CATIA, or similar).
  • Experience producing 2D drawing packages; familiarity with GD&T concepts and tolerance stack-up basics.
  • Working knowledge of fabrication/manufacturing methods (machining, sheet metal, welding, fastening, bonding) and how they influence design decisions.
  • Comfortable in fast-paced, iterative development environments; strong communication and documentation habits.


Preferred Qualifications
  • Experience with HV battery systems and structural designs (or adjacent structural systems like automotive body/chassis).
  • Familiarity with manufacturing processes such as machining, injection molding, 3D printing, and extrusions.
  • Exposure to FEA/structural analysis tools (ANSYS, Abaqus, LS-DYNA, etc.) at a basic level (interpretation/collaboration vs. ownership).
  • Knowledge of design release workflows for mechanical parts and assemblies.
  • Comfort working with electro-mechanical designs.


Why Join?
  • Innovative Technology: Work on cutting-edge energy storage solutions that power the future.
  • Career Growth: Opportunities to work on high-impact projects and advance in a growing industry.
  • Competitive Benefits: Comprehensive health, wellness, and professional development programs.
  • Mission-Driven Culture: Be part of a team that is shaping the future of sustainable energy through innovation and excellence.

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