Solaris Bus & Coach sp. z o. o. is a leading European manufacturer of city and suburban buses. Its activity is focused on the development of low- and zero-emission vehicles – electric, hydrogen and trolleybuses. Over 26,000 Solaris vehicles delivered to date operate in 33 countries and 850 cities throughout Europe and beyond. Solaris belongs to the Spanish CAF Group (Construcciones y Auxiliar de Ferrocarriles) SA and employs over 3,000 people in Poland and abroad. The brand's vehicles, from the idea through the design and implementation phase, are manufactured in Poland. The entire activity of the manufacturer is consistent with the mission contained in the slogan: 'We are changing the face of public transport'. Solaris is also an active partner for public transport operators in the zero-emission transport transformation process. The company's vehicles have been awarded many times for quality and innovation. The Urbino 18 hydrogen bus won the prestigious title of 'Bus of The Year 2025'.We are currently looking for candidates for the role of:Battery Functional Assurance SpecialistLocation: Bolechowo - Osiedle, hybrid model - 50/50 monthlyYour Tasks:·       adapting test strategies to market-specific requirements and operational scenarios,·       ensuring coverage of heavy electric vehicle-specific conditions such as regenerative braking, fast charging, and cold-start performance,·       defining functional requirements and use cases for battery systems,·       translating system-level requirements into detailed battery functional specifications,·       identifyig and documenting use cases including normal operation, fault conditions, and edge cases,·       designing test cases to validate battery behavior under various operating conditions (e.g., charge/discharge cycles, temperature extremes, communication protocols),·       ensuring test coverage includes safety, performance, diagnostics, and control logic.·       evaluating test reports to verify compliance with functional requirements,·       identifying anomalies, perform root cause analysis, and collaborate with design teams to resolve issues,·       working closely with hardware, software, systems engineering, product development, and validation teams,·       integrating functional assurance throughout the product development lifecycle,·       ensuring battery systems comply with regulatory and product-specific functional safety standards.Our expectations:  experience in battery systems engineering, functional safety, or validation, strong understanding of electric vehicle systems and battery-specific operational scenarios, ability to translate complex system requirements into actionable test plans, familiarity with industry standards and safety protocols, analytical mindset with problem-solving skills and attention to detail, excellent communication and collaboration abilities across multidisciplinary teams, very good English command.  What do we offer?  annual bonus, vacation subsidy, meal subsidy in the employee canteen, private healthcare – PZU Zdrowie, benefit platform – you decide what to use – Sports card – Multisport/Medicover Sport, points to spend (e.g., cinema, shopping, restaurants, trips), group insurance, foreign language learning – online English classes with a teacher sponsored by the employer, training and development – the opportunity to participate in internal recruitment, training relevant to your position and business needs, internal training, and the possibility of co-financing postgraduate studies, employee parking, employee referral program – a financial bonus after hiring a recommended employee, employee pension program – voluntary additional retirement funds, 'I Have an Idea' program.