Battery Management Systems Engineer

Apera; Town of Vermont (WI); On-site; USD 90,000 - 140,000; Full time

Job summary

Apera's Battery team is seeking a BMS Engineer to own the Battery Management System and Charge Control on electric aircraft. From system definition to firmware bring-up and field debugging, you will drive high-ownership work across hardware and software, aligned with certification goals.

The role requires deep embedded expertise, strong hardware/software integration skills, and the ability to work in a high‑assurance development environment to enable safe, reliable flight.

Qualifications

• Bachelor's degree or equivalent in Electrical Engineering, Computer Science, Embedded Systems, or related field.
• Strong understanding of electrical fundamentals, switching power supplies, and insulation strategies.
• Programming proficiency in C, C++, and Python for embedded software.
• Experience with software development and debugging for embedded systems.
• Ability to operate lab equipment such as HV/LV power supplies, oscilloscopes, and soldering irons.
• Experience with Git or SVN for version control.

Responsibilities

• Design battery and charge management systems with safety and fuel gauging in mind.
• Write system-level and hardware/software requirements for certification-ready charge controller hardware.
• Lead development of new software and support its testing on hardware and in the aircraft.
• Provide support and improvements for existing hardware and software across the aircraft platform.
• Support debugging and testing of hardware and software in a certification environment.
• Collaborate with Ground Support Equipment team to deliver seamless charging across platforms and EVSEs.

Skills

Electrical fundamentals

Power electronics

C/C++/Python programming

Embedded systems debugging

Lab equipment operation

Git/SVN version control

Education

Bachelor's degree in EE/CS/Embedded Systems

Tools

Altium

Job description

This role sits within the Battery team of a pioneering electric aviation company developing certifying electric aircraft from the ground up. The organisation operates across the full development lifecycle, from early-stage design through to FAA certification and production, with a mission to fundamentally decarbonise commercial aviation.

The BMS Engineer will take end-to-end ownership of the Battery Management System and Charge Control functions and circuitry on the aircraft, covering everything from system definition and prototype board design through to firmware bring-up and field debugging. This is a broad, high-ownership position suited to engineers who are equally comfortable working at bare-metal embedded level as they are defining system requirements for a certification-intent programme.

Responsibilities:

• Design battery and charge management systems with world-class safety and fuel gauging capabilities
• Write system-level, software, and hardware requirements for certification-intent charge controller hardware
• Lead development of new and improved software and support its implementation and testing on hardware and in the aircraft
• Provide support and improvements for existing hardware and software across the aircraft platform
• Support debugging and testing of hardware and software within a certification environment
• Collaborate with the Ground Support Equipment team to deliver a seamless charging experience across platforms and with third-party EVSEs

Required Experience & Skills:

• Bachelor's degree or equivalent experience in Electrical Engineering, Computer Science, Embedded Systems, or a related field
• Strong understanding of electrical fundamentals, switching power supplies, and electrical isolation and insulation strategies
• Programming proficiency in C, C++, and Python
• Experience with software development and debugging for embedded systems
• Ability to operate lab equipment including low and high-voltage power supplies, function generators, oscilloscopes, multimeters, and soldering irons
• Experience with version control systems such as Git or SVN

Desirable / Additional Qualifications:

• Master's degree or equivalent experience
• Experience with EV charging standards
• Experience with schematic capture and PCB layout, with Altium preferred
• Understanding of electrical overcurrent protection coordination and high-voltage insulation techniques
• Experience with circuit simulation software, particularly for power electronics stability, line and load regulation, and control system responses
• In-depth knowledge of high-voltage designs above 800V including isolation boundaries and techniques for power and signal transmission
• Experience designing and testing for EMI mitigation and EMC compliance
• Background in the aerospace industry
• Pilot's licence or a genuine interest in flying