Senior Battery Stack Engineer Job at XL Batteries, Marlborough, MA

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  • XL Batteries
  • Marlborough, MA

Job Description

Requisition Number: XL2025-003

Position : Senior Battery Stack Engineer

Location: Marlborough, MA

About Us

XL Batteries is a Massachusetts-based development stage company focused on long duration energy storage at the grid level. We are growing a highly collaborative team with the addition of a Senior Battery Stack Engineer. Our mission is to create a safe, low-cost and reliable grid-scale battery that will enable the transition of the grid from fossil fuels to renewable sources. We are a fast paced, nimble startup where no job is too big or small, and where we strive to ask ourselves the hard questions before problems arise.

XL Batteries is an equal opportunity employer.

About Our Location

Marlborough, MA is a beautiful small city in central Massachusetts, surrounded by quaint Massachusetts towns and within a day-trip distance of the Berkshires, White Mountains, and Cape Cod. For those who prefer a more urban lifestyle, we are located directly off I-495 within easy commuting distance of Boston and Cambridge (30-40 minutes), Worcester (25 minutes), Nashua, NH (45 minutes) and Providence, RI (50 minutes). 

About You

We are seeking a talented electrochemical stack engineer with a proven track record who is looking to design and develop electrochemical stacks to support an industry-leading storage technology. We are looking for teammates who are collaborative and creative and that are excited about designing and developing the next generation electrochemical stack. If you want to make a positive impact on the world by addressing climate change and promoting energy transition, then XL Batteries is for you.

You will have an opportunity to truly impact XL Batteries, and with that mentality we are looking for someone excited to work in a fast paced startup environment that is ever changing, where no job is too big or too small, and where we strive to constantly learn and grow.

Responsibilities

  • Design, develop and optimize the physical and functional aspects of electrochemical stacks, ensuring performance, durability and cost-effectiveness
  • Develop and specify stack components such as electrodes, membranes, current collectors, end plates, etc.
  • Define tests required to verify stack performance requirements.
  • Collaborate with other engineering disciplines to integrate the stack into larger systems, ensuring proper functionality and performance.
  • Work with cross-functional teams, including manufacturing, research, and business development, to advance stack technology and bring products to market. 
  • Continuously seeking opportunities to improve stack performance, reduce costs, and enhance overall system efficiency. 
  • Identify, and solve stack related design, build and supplier related issues.
  • Create stack development plans and schedules to meet company objectives.
  • Lead stack development projects.
  • Own and meet milestones using Objectives and Key Results (OKRs).
  • Maintain a clean and safe work area.

Qualifications

Required

  • B.S. in Mechanical Engineering, or related fields 
  • Strong mechanical design background.
  • Hands-on experience with electrochemical cells and stacks: This includes developing and testing fuel cells, electrolyzers, or flow batteries. 
  • Strong understanding of electrochemistry, thermodynamics, and kinetics: This is crucial for optimizing stack performance and durability. 
  • Excellent problem-solving and analytical skills: This is needed to identify and address performance issues and improve stack design.
  • Strong communication and teamwork skills: This is essential for collaborating with other engineers and stakeholders.
  • Demonstrated ability to create a stack product development plan including test and material development to meet system design deadlines.
  • Highly motivated and self-driven with the ability to work independently.
  • Ability to lead a stack development project.
  • The ability to set priorities while juggling multiple tasks.
  • Strong written and oral communication skills required.
  • Must have legal authorization to work in the United States.

Preferred

  • M.S or Ph.D. in Mechanical Engineering or related fields.
  • 5-10+ years of experience
  • Experience in conducting Failure Mode and Effects Analysis (FMEA)
  • Experience working with stack material suppliers and defining quality requirements

Compensation & Benefits

  • We offer competitive salary and benefits, including healthcare, dental, vision, and a retirement plan

Application Process

  • Apply through xl-batteries.breezy.hr

Job Tags

Full time,

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