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Mechanical Engineer

Stafl Systems
Posted 3 months ago, valid for 7 days
Location

South San Francisco, CA 94080, US

Salary

$125,000 - $165,000 per year

Contract type

Full Time

Health Insurance
Paid Time Off
Life Insurance

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Sonic Summary

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  • Stafl Systems is seeking a motivated Mechanical Engineer with 2+ years of experience, ideally in battery technologies, to design and develop next-generation battery systems.
  • The role involves cross-functional collaboration and ownership of projects, focusing on mechanical system design from CAD modeling to validation testing.
  • Candidates should possess hands-on experience with rapid prototyping and familiarity with manufacturing processes like CNC machining and injection molding.
  • The salary range for this position is between $125,000 and $165,000, with additional equity awards and a comprehensive benefits package.
  • Stafl Systems values precision and communication skills, aiming to bridge complex engineering challenges with effective execution across teams.

The Opportunity 

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.

What You'll Do

  • Design and model mechanical components and assemblies using SolidWorks 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.

Qualifications You'll Bring

  • 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.

What Makes You Stand Out

  • Experience designing for consumer products, e-mobility, automotive, or aerospace applications.
  • 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.

We've Got You Covered:  

  • 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.

Additional Perks, it's Nice Here: 

  • 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.

 

South San Francisco, CA pay range
$125,000—$165,000 USD

Battery Technology Solutions for a Clean Energy Future

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 with industry leaders to push the boundaries of innovation in such fields as electric vehicles, aviation, and consumer products. Our team has the proven engineering expertise to offer technical consulting, full-stack product development, in-house prototype fabrication, circuit board and battery pack manufacturing, and fleet management tools to solve the most complex challenges facing today's cleantech industry.   

 

Stafl Systems Does Not Work with Outside Recruiters/Recruiting Agencies

Stafl Systems does not work with outside recruiters or recruiting agencies to fill positions. We encourage all qualified applicants to apply directly with Stafl Systems.

Non-Discrimination

Stafl Systems, LLC. is an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, veteran status, or any other status protected under federal, state, or local law.




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