Breakthrough Energy Ventures Portfolio Company Career Opportunities

Battery Responsible Engineer

Stoke Space

Stoke Space

Kent, WA, USA
Posted on Wednesday, October 18, 2023

A thriving economy in space is needed to make life on Earth more vibrant, sustainable, and equitable. Space technology will enable global access to information, solutions to climate change, answers to global food security, products that transform healthcare, clean energy production, and more. Today, rocket launch options are slow, expensive, and unreliable. Stoke is building the world’s most efficient fully and rapidly reusable rocket designed to fly daily that will radically increase access to space and open up the space economy to safeguard our precious home, Earth.


The avionics system is the backbone of highly reusable, operable, and reliable space systems. As the battery engineer at an early-stage start-up you will be responsible for owning the entire battery system. You will work closely with the rest of the development team and other stakeholders to design and implement the battery architecture, procure cells and other components, develop custom hardware, define and perform component and system-level tests, integrate the battery system into the rocket, and continuously iterate and improve your designs. You will seek out state-of-the-art solutions to difficult problems and you will assist in the definition of company standards for avionics development. You must be ready to stay focused, move fast, self-direct, and learn on the fly.


  • Lead the design, procurement, development, and integration of vehicle battery systems
  • Battery Module Design:
    • Cell selection, procurement and qualification
    • Battery enclosure mechanical & thermal design
    • Current collector design
    • Wire bonding process development
    • Design for manufacturing, testability, and operations
    • Design of safety procedures
  • Battery Module Build & Test:
    • Hand build initial proof of concept units
    • Work with technicians to develop a low volume battery production and testing line
    • Perform initial qualification testing of battery modules, including thermal cycling, vibration testing, and vacuum testing
  • Vehicle Integration:
    • Install battery modules in hardware testing setups (“hardware-in-the-loop” HIL/HITL) and monitor battery performance and behavior as part of the complete integrated avionics system
    • Install battery modules on the rocket (stage 1 and stage 2) and perform in-situ tests of the battery systems
    • Support launch operations by being the primary point of contact for battery performance, health, and troubleshooting
  • Design specifications and lead “design vs procure” trades to enable rapid product iteration
  • Collaborate with government agencies to procure licenses for manufacturing, transportation, and operation of Stoke’s battery modules
  • Work with electrical and software engineers to design and integrate the battery management system and battery telemetry
  • Design and conduct qualification and acceptance testing plans for all hardware


  • B.S. degree in a relevant (electrical, mechanical, or manufacturing) engineering discipline or equivalent on the job experience
  • 2+ years of experience as a battery engineer or related role
  • Fundamental understanding of battery module design from the component level up
  • Excellent written and verbal communication skills
  • Rigorous attention to detail
  • Ability to lead
  • Ability to follow


  • Medical, dental, vision and basic life insurance
  • 401(k)
  • Paid time off
  • Flexible scheduling
  • Equity


Target Level:

  • Level 3 Range: $120,900 - $181,300

Our job posts are intentionally written to attract a wide variety of experience levels, and we make decisions about the right fit on a per-candidate basis.

Your actual level and base salary will be decided based on your specific experience and skill level.

Equal Opportunity

The Company is an Equal Opportunity Employer, including with respect to disability and veteran status. It is committed to compliance with all equal opportunity laws, including the Immigration and Nationality Act (INA) and Title VII. It does not discriminate on the basis of nationality, race, citizenship, immigration status, or any other protected class when it comes to employment practices, including hiring.

Employment at the Company is contingent upon satisfactory completion of reference and background checks, and on your ability to prove your identity and authorization to work in the U.S. for the Company. Employees must comply with the United States Citizenship and Immigration Services employment verification requirements, and, therefore, they must complete an Employment Eligibility Verification Form I-9 at the start of employment and re-verify authorization to work periodically.

Separate from this I-9 process, this position entails access to certain technology and technical data that is restricted under U.S. export control laws and regulations. Employment or continued employment may be conditioned on your legal authorization to work with or have access to export control materials as necessary to perform your job.