Senior Mechanical Lead, Battery & Powertrain

We are seeking a Senior Mechanical Engineering Team Lead who thrives in a fast-paced, high-growth environment. In this role, you will lead and grow a team of mechanical engineers while working cross-functionally to develop next-generation battery and powertrain technologies for mobility and consumer product applications. This role balances management with hands‑on technical work. Initially, you'll split your time roughly equally between leading the team and contributing to mechanical engineering development. As the team scales, the balance will shift toward leadership. It's an ideal role for someone ready to step into management while staying connected to the technical work. What You’ll Do Lead and mentor mechanical engineers at various career levels, supporting their technical and professional growth Oversee the team's technical strategy and ensure adherence to best practices and design standards Participate in technical design reviews and contribute hands‑on to engineering work Allocate team workload across multiple concurrent projects, balancing priorities and timelines Estimate engineering effort for new projects and help scope work accurately Identify and procure the software, tools, and resources needed for effective mechanical development and test Drive hiring and team growth aligned with company needs Collaborate across engineering, project management, operations, clients, and executives Support client‑facing interactions as needed Qualifications You’ll Bring BS or MS in Mechanical Engineering, or equivalent combination of technical education and experience 5+ years of mechanical engineering experience Proven ability to lead cross‑functional technical projects from concept through production Track record of taking hardware from concept through development, test, certification, and production Proficiency in SolidWorks or equivalent CAD tools Ability to create and implement processes for development and test of mechanical designs Clear, effective communicator with engineers, clients, vendors, and executives Highly organized, resourceful, and able to manage multiple priorities in a fast‑paced environment What Makes You Stand Out Experience with electric or hybrid vehicles Background in battery technology Cross‑disciplinary depth across mechanical, hardware, and software systems Experience building and scaling an engineering team Ownership mindset with the ability to adapt to evolving priorities in a fast‑paced environment Benefits & Compensation We offer a comprehensive total rewards package designed to support your health, financial wellbeing, and work‑life balance. Financial Wellbeing Competitive Compensation: Base salary, sign‑on bonus, plus an equity award. 401(k) Plan: Employer match up to 5% to help contribute to your future. Comprehensive Benefits: Health, Dental, Vision, and Life Insurance, with 99% of employee premiums and 50% of dependent premiums covered by the company. Paid Parental Leave: Fully paid leave to support your growing family. Time Off Vacation & Sick Leave: Accrued vacation and sick leave. Company Holidays: Paid holidays in accordance with the company schedule. Flexible Leave: Unpaid personal leave options available when needed. We provide programs and experiences that foster connection, growth, and a supportive workplace culture. PTO Nomination Program: Recognize and reward your teammates with additional time off. Bereavement Leave: 1 week fully paid. Jury Duty Leave: Up to 1 week fully paid. Growth & Safety Professional Development: Annual training budget to support your career growth. Safety Shoe Stipend: Company‑provided support for required safety gear. Office Life & Culture Collaborative Environment: We operate primarily on‑site to foster fast‑paced collaboration and execution. Hybrid flexibility may be available after an introductory period, depending on business needs. Team Outing Program: Department events including a half‑day off and a company‑sponsored allowance. Social Calendar: Weekly, monthly, and seasonal team‑building events. Fuel Your Day: Regular catered team lunches plus a kitchen fully stocked with snacks and beverages daily. Travel & Charging: Uber Business access, free on‑site EV charging, and more. 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. About Stafl Systems 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, we’ve partnered with industry leaders to push the boundaries of innovation across electric vehicles, aviation, marine and consumer products. Our team brings proven engineering expertise across technical consulting, rapid product development, in‑house prototype fabrication and battery pack manufacturing to solve some of the most complex challenges in today’s cleantech industry. The pay range for this role is: 165,000 - 190,000 USD per year (South San Francisco ) #J-18808-Ljbffr Stafl Systems