Battery Systems Engineer (All Genders)

At Stark, we forge the future of European and national security through cutting-edge, AI-driven technology and unmatched engineering precision. As a premier defence technology company, our mission is clear: to equip NATO Allies and their partners  with next-generation autonomous defence platforms and advanced AI-driven software built to perform in the world’s most demanding environments.

We believe that true security stems from relentless innovation. By combining elite engineering talent with agile technology and an AI-native operational culture, Stark turns complex defence challenges into field-tested, multi-domain solutions.

WHY JOIN US

• The software and systems you work on directly protect personnel and defend European and national sovereignty.
• You will work alongside industry-leading minds on autonomous systems, advanced propulsion, and secure cyber platforms.
• We foster a fast-paced, collaborative environment where bold ideas are supported by serious R&D backing.

ABOUT THE TEAM

Our engineering team combines elite talent with agile development to build robust, scalable, and high-performance autonomous defence systems.

YOUR MISSION

As a Battery System Engineer, you will be responsible for the end-to-end design, development, and integration of high-performance battery packs for our fleet of drones. Because every gram and watt matters in aviation, you will focus heavily on optimizing for Size, Weight, and Power while ensuring uncompromising safety, thermal stability, and cycle life. You will work cross-functionally with mechanical, firmware, and aerospace engineers to seamlessly integrate the battery system into our application.

WHAT YOU WILL DO AT STARK

• System Design & Architecture: Lead the architectural design of bespoke battery packs tailored to the high-discharge and strict weight requirements of UAVs (Unmanned Aerial Vehicles).
• BMS Integration: Work closely with firmware and electronics teams to define requirements for Battery Management Systems (BMS), including state-of-charge (SOC) and state-of-health (SOH) algorithms, cell balancing, and fault protection logic.
• Thermal & Mechanical Management: Collaborate with mechanical engineers to design lightweight enclosures and thermal mitigation strategies that prevent overheating during peak flight loads.
• Testing & Validation: Develop rigorous test plans for battery packs at the cell, module, and pack levels using testing equipment. Conduct thermal runaway, drop, vibration, and environmental testing.
• Compliance & Safety: Ensure all battery designs meet relevant international safety and transport standards (e.g., UN 38.3).
• Manufacturing Support: Partner with supply chain and external contract manufacturers to transition designs from prototype to mass production, ensuring high yield and quality control.

WHAT YOU BRING TO THE MISSION

• Bachelor’s or Master’s degree in Electrical Engineering, Mechanical Engineering, or a related field.
• 3+ years of professional experience in battery system design, preferably in aerospace, automotive (EV), or consumer electronics.
• Deep understanding of lithium-based battery chemistries, failure modes, and degradation mechanisms.
• Experience with BMS architecture, cell monitoring, and protection circuitry.
• Proficiency in CAD software (e.g., Catia) and PCB design/review tools (e.g., Altium).
• Familiarity with communication protocols such as CAN, I2C, and UART.
• Hardware Experience: Hands-on experience building prototypes, soldering, and using lab equipment (oscilloscopes, electronic loads, battery cyclers).

NICE TO HAVE

• Direct experience designing battery systems specifically for drones, eVTOLs, or other electric aircraft.
• Familiarity with writing test scripts using Python or MATLAB for data analysis.

If you're interested in building the future of European Defence with us, and you see yourself reflected on the description above, please send us your CV in English. We're looking forward to meeting you!

SECURITY CLEARANCE

Due to the nature of our work in the defence sector, candidates must be eligible to obtain and maintain the appropriate security clearance required for this position. Details will be provided during the recruitment process.

EQUAL OPPORTUNITY

We are an equal-opportunity employer committed to fostering a diverse and inclusive workplace. All qualified applicants will receive consideration for employment without regard to race, colour, religion, sex, national origin, disability, or any other characteristic protected by applicable law.