SENIOR BATTERY CELL ENGINEER (M/F/D)

Senior Battery Cell Engineer (m/f/d) – (Full Time)

We are seeking a skilled Senior Battery Cell Engineer to drive the research, development, and integration of advanced battery cells and systems specifically for our UAV products. This role involves identifying and evaluating new cell technologies, collaborating with suppliers, and optimizing battery performance for aerial applications. You will be instrumental in defining cell specifications and ensuring their suitability for demanding flight requirements, as well as bringing new technologies into industrialized products. A strong understanding of electrochemical principles, battery architectures, and thermal management is essential.

Responsibilities:

Responsibilities include but are not limited to:

• Cell Technology Scouting & Evaluation:
  • Identify and evaluate emerging battery cell technologies (e.g., high-energy-density Li-ion, silicon-dominant anodes, solid-state) to enhance UAV performance in terms of energy density, power density, gravimetric efficiency, and safety.
  • Monitor industry trends and research advancements in battery cell development for aerospace applications.
  • Conduct feasibility studies and provide technical recommendations on new cell technologies for integration into UAV product generations.
• Establish and maintain technical relationships with battery cell manufacturers and research institutions.
• Manage the sourcing of prototype battery cells for in-house and external testing.
• Collaborate with suppliers on technical discussions, data exchange, and product roadmaps.
• Battery Cell Performance Characterization & Testing:
  • Design and oversee comprehensive in-house and/or external testing protocols for prototype battery cells, focusing on UAV-specific performance metrics
  • Analyze test data, interpret results, and generate reports to characterize cell performance, identify limitations, and benchmark against targets.
  • Refine testing methodologies for accurate and reliable cell evaluation within rapid development cycles.
• Simulation & UAV System-Level Performance Analysis:
  • Develop and utilize electrochemical, thermal, and electrical simulation models to predict battery cell and UAV system performance under various flight conditions.
  • Conduct sensitivity analyses to assess the impact of cell parameters on overall UAV flight endurance and power capability.
  • Evaluate cell technologies for specific UAV platforms based on energy, power, gravimetric/volumetric density, and thermal management requirements.
• Cell Limit Definition & UAV Application Optimization:
  • Collaborate with battery cell manufacturers to define application-specific operating limits and performance envelopes for cells tailored to UAV mission profiles.
  • Ensure cell operating strategies maximize performance, cycle life, and safety under aerial operational stresses.
• Custom Cell Specification & Sourcing:
  • Develop detailed technical specifications for customized battery cells to meet unique UAV product requirements.
  • Manage the technical aspects of custom cell development projects through to production.

Required Skills and Qualifications:

• Ability to work from our offices in Munich, Germany.
• Background in Electrochemistry, Materials Science, Electrical Engineering, Chemical Engineering, or a related field.
• Hands-on experience in battery cell R&D, characterization, or system integration, with a focus on Lithium-ion battery technologies. Experience in aerospace, automotive, or high-performance energy storage is preferred.
• Strong understanding of battery electrochemistry, cell components (anode, cathode, electrolyte, separator), and manufacturing processes.
• Practical experience with battery cell testing equipment and data analysis tools.
• Proficiency in battery modeling and simulation software (e.g., COMSOL, GT-SUITE, MATLAB/Simulink, or equivalent), particularly for thermal and electrical performance prediction under dynamic loads.
• Strong analytical and problem-solving skills, with the ability to interpret complex data and make informed decisions.
• Excellent communication, interpersonal, and negotiation skills for effective collaboration with internal teams, external suppliers, and customers.
• Ability to work independently and as part of a multidisciplinary team in a fast-paced environment.
• Experience with silicon-dominant anodes, solid-state batteries, or other advanced battery chemistries is a plus.
• Knowledge of battery management systems (BMS) and pack-level integration for high-power, lightweight applications.
• Excellent English communication skills both written and verbal.
• German language skills are welcome.

Your Benefits of working at EFT Mobility:

Direct impact:
See your contributions rapidly integrated from cutting-edge research into industrialized products, flying in the field within short development cycles.

Young and Dynamic Community:
Pursue a career you love as part of a young, dynamic, and fast-paced team with flat structures, quick communication, and a ton of daily learnings.

Develop your career:
Join us early on our mission and you will have the opportunity to develop into a leading position in our growing company and the industry.

Culture & Environment:
A dynamic, fast-paced, and collaborative startup environment with flat hierarchies, efficient collaboration, and a strong emphasis on continuous learning opportunities.
Work-life Balance:
We offer flexible work schedules, remote work options (where suitable for your role and agreed upon with your manager), and 30 days of paid vacation each year to support your personal and professional life.

Lunch Benefit:
We promote healthy eating and the well-being of our employees with a monthly lunch budget.

Mobility Benefit:
With our mobility budget, we pay your Deutschlandticket for work or personal use.
Team Events and Celebrations:
From Oktoberfest and summer parties to tri-weekly Weißwurst Frühstück – with us, you can look forward to varied team events.
Enjoy table football, Mario Kart, or Nintendo Switch:
Need a break? Challenge someone to a game of table football, Mario Kart, or fire up the Nintendo Switch.
German Learning Opportunities:
If German isn’t your first language, we sponsor German courses for you to quickly learn and integrate into your new environment.

Enjoy a Dog-Friendly Office:
Love animals? Bring your furry friend to work and enjoy a paws-itively fun atmosphere with your dog by your side.

Snack on Fresh Fruit and Treats:
Fuel your day with a variety of fresh fruit or help yourself to a fresh bowl of cereal, plus occasional surprises like muffins, cupcakes, and other tasty treats throughout the week.
Beers and Drinks On-Hand:
Cool down with a beer or explore a selection of drinks in the office, perfect for socializing or taking a well-deserved break.

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