Mechanical Engineer

We are looking for a motivated Mechanical Engineer who thrives on rapid iteration. We move with the speed and autonomy of a startup to bring next-generation battery technologies to market. In this role, you will work cross-functionally with our in-house teams to develop the next generation of battery and powertrain technologies for high-performance mobility and consumer applications.

You will take on project ownership and design high-quality mechanical systems across a diverse product portfolio. Your impact will span the entire development lifecycle—from initial CAD design and simulation to rigorous validation testing, prototyping, and manufacturing bring-up. The ideal candidate values precision, thrives on technical challenges, and possesses excellent communication skills to bridge the gap between complex engineering and cross-functional execution.

• Design and model mechanical components and assemblies using Solid Works CAD and PDM.
• Execute structural, thermal, and fluid simulations, correlating digital results to physical testing.
• Develop and execute test plans and design validation methods for battery system failure modes.
• Perform trade-off analyses and DOEs to optimize designs for performance and cost.
• Lead prototype builds and support manufacturing bring-up for new product lines.
• Collaborate with interdisciplinary teams (Electrical, Software, Systems) to deliver high-confidence products.

• 2+ years of mechanical engineering experience, ideally involving battery technologies.
• Hands‑on experience with rapid‑prototyping to create functional jigs and fixtures.
• Experience designing for CNC Machining, Injection Molding, Sheet Metal, and 3D Printing.
• Familiarity with laser welding and IP67 sealing methods.
• Ability to clearly communicate technical issues in succinct language to non‑technical teammates.
• BS, MS, or MEng in Mechanical Engineering.

• Experience with manufacturing bring‑up, both in‑house and with external contract manufacturers (CMs).
• Familiarity with PDM and PLM systems for revision control.
• Knowledge of safety and transport standards (UN 38.3, UL 2580, UL 2271).
• A demonstrated ownership mindset and the ability to thrive in ambiguity and fast‑paced environments.
• Comprehensive Benefits Package – including Health, Dental, Vision, and Life Insurance (99% of premiums covered).
• Competitive Compensation – base salary plus equity award.
• 401(k) Plan – with employer match up to 5%.
• Paid Time Off – 3 weeks of accrued vacation time.
• Paid Sick Leave – 2 weeks of accrued sick leave.
• Paid Parental Leave – 4 weeks of fully paid leave.
• Company Holidays – paid holidays in line with our company holiday schedule.
• Unpaid Personal Leave – flexible options available.

• PTO Nomination Program – recognize teammates with extra time off!
• Team Outing Program – Sub‑department events designed to connect and recharge, including a half‑day off and a company‑sponsored allowance!
• Catered Team Lunches – enjoy delicious, company‑provided meals together or individually.
• Fully Stocked Kitchen– snacks, drinks, and more to keep you fueled.
• Commuter Benefits – Uber Business Account access, free EV charging, and more.
• Professional Development – budget for training and development.
• Company Team Building Events – weekly, monthly, and seasonal gatherings.
• Flexible Work Options – While our culture emphasizes in‑person collaboration, hybrid flexibility is available after the introductory period to support focused work or personal needs.
• Safety Shoe Stipend – support for required gear.
• Bereavement Leave – 1 week fully paid.
• Jury Duty Leave – 1 week fully paid.

The salary range represents the expected base salary for this role. The actual offer will be based on a variety of factors, including knowledge, skills, abilities, and experience. In addition to base salary, full‑time employees are eligible for equity/bonus programs and a comprehensive benefits package.

Stafl Systems is dedicated to advancing all applications of lithium‑ion battery technology to achieve a clean energy future. Since 2010, our company has partnered…