Senior Battery Management System (BMS) Hardware Engineer (all genders)

VÆRIDION; München; Hybrid; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Lunch subsidy

Stock options

Flexible schedule

Office Munich or Delft

Pension scheme

Job summary

VÆRIDION is seeking a Senior Battery Management System Hardware Engineer to own the architecture and design of flight-ready propulsion battery electronics. You will develop high-density, mixed-signal hardware for monitoring, control, and protection of large lithium-ion battery assemblies across charging, ground operations, and flight.

You will lead prototype bring-up, qualification, and production transfer while collaborating with software, safety, PCB layout, thermal, testing and manufacturing

Qualifications

• Bachelor's or Master’s degree in Electrical Engineering or related field.
• Seven or more years of experience in developing complex electronic hardware from architecture to production release.
• Proven experience with BMS hardware or high-channel-count safety-critical mixed-signal systems.
• Strong expertise in precision analogue measurement, ADC signal chains, current/voltage sensing, isolation and fault-tolerant power supplies.
• Experience designing high-density multilayer electronics with HDI technology and fine-pitch devices.
• Strong digital hardware knowledge with microcontrollers, memories, CAN/CAN FD, SPI, I2C and isolated interfaces.
• Hands-on experience with DO-254/ED-80 lifecycle evidence and DO-254/DO-311A considerations.
• Fluent English; German beneficial.

Responsibilities

• Own architecture and design of battery management units and sensing circuits.
• Translate requirements into traceable hardware requirements.
• Design accurate measurement circuits for cell voltage, temperature, pack voltage, current.
• Develop high-density mixed-signal electronics with AFEs, balancing, MCUs, watchdogs and isolated supplies.
• Define PCB architecture for multilayer HDI assemblies, ensuring signal/power integrity and EMC.
• Perform circuit simulation, tolerance analysis, FMEA, reliability assessments.
• Collaborate with safety engineering to implement fault detection and safe-state behavior.
• Develop DO-254/ED-80 lifecycle evidence and verification records.
• Lead prototype bring-up, debugging, and fault-injection testing.
• Support DO-160G environmental and EMC qualification and production transfer.
• Collaborate with software, layout, mechanical, thermal, testing, manufacturing and certification teams.
• Lead hardware design reviews and mentor engineers.

Skills

BMS hardware

high-channel-count systems

analogue measurement

HDI multilayer design

microcontrollers

CAN/CAN FD

I2C/SPI

DO-254/ED-80

Altium Designer

lab testing

Education

Bachelor's or Master's in Electrical Engineering

Tools

Altium Designer

Cadence

Siemens EDA

LTspice

Job description

Your Mission:

As a Senior Battery Management System (BMS) Hardware Engineer (all genders), you will own the development of safety-critical electronics for the Microliner’s propulsion battery system. You will design compact, high-density mixed-signal hardware that accurately monitors, controls and protects large lithium-ion battery assemblies during charging, ground operation and flight.

This is a hands-on role covering the complete hardware lifecycle: requirements, architecture, circuit design, prototype bring-up, verification, qualification, production release and certification evidence.

Working closely with BMS software, battery systems, safety, PCB layout, mechanical integration, thermal systems, testing and manufacturing, you will turn the propulsion battery’s safety and control concepts into flight-ready, certifiable electronic hardware.

Your Day-to-Day:

• Own the architecture and detailed design of battery management units, cell-monitoring electronics and associated sensing, communication and protection circuits.
• Translate system, interface and safety requirements into complete, traceable and verifiable hardware requirements.
• Design accurate measurement circuits for cell voltage, temperature, pack voltage, current and other battery sensors.
• Develop high-density mixed-signal electronics incorporating battery-monitoring AFEs, balancing circuits, microcontrollers, watchdogs, memory, isolated communications and power supplies.
• Define the PCB architecture and layout constraints for multilayer HDI assemblies, including fine-pitch components, microvias, grounding, signal and power integrity, EMC, thermal management, creepage and clearance.
• Perform circuit simulation, tolerance analysis, worst-case circuit analysis, component derating, FMEA/FMECA and reliability assessment.
• Work with Systems and Safety Engineering to implement fault detection, diagnostic coverage, independence and safe-state behaviour in accordance with the allocated Design Assurance Level.
• Develop and maintain DO-254/ED-80 lifecycle evidence, including hardware requirements, design data, traceability, verification results, review records and problem reports.
• Lead prototype bring-up, debugging, integration and fault-injection testing using cell simulators and flight-representative hardware.
• Support DO-160G environmental and EMC qualification, DO-311A battery-system testing and transfer into repeatable production through DFM, DFT and manufacturing-test development.
• Collaborate closely with BMS software, battery systems, PCB layout, mechanical, thermal, testing, manufacturing and certification teams.
• Lead hardware design reviews, resolve test and production failures and mentor less-experienced engineers.

Your Profile:

• Bachelor’s or Master’s degree in Electrical Engineering, Electronics Engineering or a related field.
• Seven or more years of experience developing complex electronic hardware from architecture through verification and production release.
• Proven experience with BMS hardware, battery-monitoring electronics or comparable high-channel-count, safety-critical mixed-signal systems.
• Strong expertise in precision analogue measurement, ADC signal chains, filtering, current and voltage sensing, galvanic isolation and fault-tolerant power supplies.
• Demonstrable experience designing high-density multilayer electronics, including HDI technology, fine-pitch BGA/QFN devices, microvias, power distribution, grounding and thermal constraints.
• Strong digital-hardware knowledge involving microcontrollers, memories, watchdogs, CAN/CAN FD, SPI, I²C and isolated serial interfaces.
• Hands-on experience developing airborne electronic hardware under DO-254/ED-80 is essential. Experience at DAL B or DAL A and supporting formal certification reviews is strongly preferred.
• Proficiency with professional ECAD and simulation tools such as Altium Designer, Cadence, Siemens EDA, LTspice or equivalent. Altium experience is preferred.
• Confident laboratory skills and experience with prototype bring-up, automated testing, environmental qualification, failure analysis and electronics manufacturing.
• Familiarity with CS-23, ARP4754A/B, ARP4761/ARP4761A, DO-160G and DO-311A is advantageous.
• Fluent English is essential; German is beneficial.

We recognize that women and other under-represented groups are often overlooked in our industry. If you’re excited about this role but don’t meet every listed qualification, we still encourage you to apply. Talent and potential can’t always be captured in a checklist.

Why us?

• Be part of an ambitious team determined to shape the future of aviation.
• We are an in-office company, but we value flexibility and trust employees to manage their schedules responsibly. This may include occasional remote work or adjusting hours to accommodate personal commitments.
• Subsidized EGYM Wellpass membership: your (mental) health is important for us.
• Enjoy a subsidized lunch with a 5€ company contribution per meal on office days.
• Become a part of our success with virtual stock options.
• Choose the option that suits your needs: either a free charging station for your electric car or a public transport job ticket as part of the Deutschlandticket.
• Lease a high-quality bicycle or e-bike through our JobRad program and benefit from tax advantages. Whether for your daily commute or personal use, enjoy more mobility and sustainability.
• Pension scheme to support your long-term financial security.
• Work in one of our offices in Munich or Delft. Enjoy the modern Balan Campus in Munich or work inside the aerospace ecosystem at TU Delft.
• Boost your professional as well as personal growth executing your own ideas and independent projects.
• Join our internal social events and retreats (e.g. cooking, game nights, sports).

VÆRIDION was founded in 2021 to transform regional air travel with the Microliner, a 100% electric commercial aircraft. By delivering the most energy-efficient aircraft, we are building the future where clean, safe, and affordable electric aviation seamlessly connects people and businesses. We’re bringing together the brightest minds in aerospace, automotive engineering, and business to disrupt the aviation industry.