As a technical lead in development projects for battery energy storage systems (BESS), you will play a crucial role in guiding technical aspects of development projects, ensuring alignment with internal and external requirements. Your responsibilities will include: Your impact Developing system architectures for BESS, considering technical specifications, creating hardware/software concepts, and documenting related materials. Acting as a technical expert in battery and photovoltaic (PV) systems, understanding component functions and system operations. Providing expertise and guidance to support other teams, such as Technical Service and Training, in accompanying battery systems throughout their lifecycle in the market. Identifying and coordinating work packages with internal departments and external partners, including research institutions and suppliers. Collaborating with Purchasing to monitor cost figures for components and subsystems and optimizing costs within systems. Supporting the planning, organization, and documentation of certification processes for new and existing products to ensure regulatory compliance. Who you are You have a mindset of flexibility, initiative, and responsibility. You are familiar in working along the V Model and have long term, detailed knowledge in hard and software development for battery & PV systems. You also bring: Master''s degree in electrical engineering, energy management systems, or a related field Expert knowledge and solid experience in developing electrical energy storage technologies, including integration with PV systems, battery storage, charging infrastructure, inverter technology, and e mobility Applied knowledge in lifecycle management and proficiency with tools such as Siemens Polarion and Atlassian Jira Proficiency in English (C1 level); German language skills (B2 level) preferred Even if you don''t fulfill all of the above but are ready to take this challenge on as a next step, go ahead and press "Apply" anyway. We love your spirit! What makes us special Our employees are the key to make our vision come alive. With that in mind, we''ve created a range of perks for our employees: A permanent position awaits you at our business where new technologies meet a modern workplace culture. Viessmann Climate Solutions offers 30 days of paid vacation a year. Plan for your retirement: take advantage of subsidies through our employer funded pension program. Once you join Viessmann Climate Solutions, you can refer other great candidates and receive a referral bonus if they are hired. Enjoy cool exclusive discounts on selected Viessmann Climate Solutions products and services. You''ll be spoiled for choice with our selection of locally sourced, healthy, and affordable meals in our employee restaurant. For a healthier community: Our health program offers easy access to coaching and therapy for our employees and their families. Who we are We are Viessmann Climate Solutions. Founded in 1917 as a heating techn