We pioneered the Organic SolidFlow battery CMBlu Energy is on an exciting journey towards becoming a global cleantech company . Our mission is to enable unlimited energy storage modelled on nature - for everyone , worldwide . What are SolidFlow batteries ?

SolidFlow batteries store energy in organic molecules . The absence of explosive materials makes them safe, the use of socially and ecologically conflict-free raw materials makes them sustainable and the almost unlimited availability of materials makes them scalable and cheap to procure . This makes our patented SolidFlow technology a game changer in the development of a global climate -neutral energy system .

From start-up to scale-up : we're tackling it together CMBlu Energy is developing from a start-up focussing on research into a manufacturing scale-up that is on its way to series production . Around 240 employees are working towards this goal at CMBlu Energy. Our head office is in Alzenau near Frankfurt, with a branch office in Obernburg.

There are also subsidiaries in Athens, Greece and Petaluma, USA.

Responsibilities

Define electrical

Requirements

for power flow, protection, and monitoring components within our battery energy storage and power conversion systems Derive

from customer specifications, project constraints, risk assessments, and applicable IEC, EN, and VDE standards while ensuring alignment with mechanical, thermal, software, and integration

Perform electrical calculations and analyses including cable and busbar sizing, short-circuit behavior, voltage drop, thermal loading, protection coordination, insulation concepts, and fault scenarios Develop and contribute to electrical system architectures covering HV and LV distribution, communication interfaces, protection philosophies, fault handling, and system integration concepts Define testing and validation

, acceptance criteria, and compliance documentation while supporting FAT, SAT, certification, and customer compliance activities Support customer projects throughout the entire lifecycle, participate in design reviews, FMEAs, risk assessments, and hazard analyses, and coordinate electrical testing and commissioning activities Your Profile Degree in Electrical Engineering, Energy Technology, Power Electronics, or a comparable field Several years of experience in high-voltage electrical systems, industrial power systems, energy storage, power conversion, e-mobility, aerospace, or comparable high-power applications Strong knowledge of relevant IEC, EN, and VDE standards as well as deep expertise in HV design, protection concepts, grounding, insulation monitoring, short-circuit behavior, and thermal design Experience defining and reviewing technical

, electrical architectures, component specifications, validation plans, and verification evidence Proven ability to work effectively across multidisciplinary teams including engineering, product development, procurement, production, and customer project organizations, ideally with experience in battery energy storage systems or grid-connected power conversion systems Fluent in English and German, with experience using automation, scripting, or AI-based tools to improve engineering workflows considered a plus Our

Benefits

at CMBlu Energy AG for You: VSOP Program : With our Virtual Stock Option Program (VSOP), you can be part of the success of CMBlu Energy AG and benefit from the growth of our company. Deutschland-Ticket : We fully cover the cost of a Germany-wide train ticket, allowing you to travel sustainably and comfortably. Meaningful work: Work on the development of our innovative Organic SolidFlow battery, which makes an important contribution to sustainable energy use and storage.

Remote Work : Depending on the role, we offer the possibility to work partially remotely, if the position allows.

Senior Electrical Design Engineer (all genders)