Shaping the future of energy storage At A123 Systems, we're driving the transition to cleaner, more efficient energy solutions with advanced lithium ion storage technologies. Our cutting-edge battery systems offer superior energy density, safety and durability, helping vehicle manufacturers achieve exceptional performance while reducing their environmental footprint. Our expertise goes beyond automotive applications. In addition to high-voltage batteries for electric and hybrid vehicles and low-voltage solutions that improve efficiency, we also produce energy storage systems (ESS) designed to optimize energy use, support the integration of renewable energy sources and provide reliable backup power. With capabilities that include innovative cell chemistry, integrated thermal management, software and electronics, we deliver complete, cost-effective energy solutions tailored to our customers' needs. Backed by a global manufacturing footprint and a commitment to pushing the limits of performance, A123 Systems is reducing emissions, improving energy efficiency and powering a cleaner, greener future across industries. We are looking for Internal Accountant (all genders) for our team Full-time, but Part-time possible Responsibility: Receive and verify invoices in both digital and paper formats Upload invoices to the accounting system with all required details Manage payment due dates and prepare payments by reviewing documentation and requesting disbursements Ensure the accurate, timely, and relevant recording, reporting, and analysis of financial information Maintenance of up-to-date accounting records and systems Ensure bank payments Assist in the preparation and review of the budget forecast Preparation of financial forecasts and variance analysis Manage the contracts with the service providers Cooperate with the HR Liaise and collaborate with external partners such as Accounting and Tax Offices, Federal Offices / Departments Manage the internal procurement with the support of a working student Based on the Group's approach, ensure the implementation of the various policies and procedures, taking into account local legal requirements Education & Experience: Commercial apprenticeship or related financial/administrative degree Previous experience with the German accounting Hands-on experience with DATEV, SAP, etc. is a plus Advanced skills in MS Excel Experience in a global, ideally in a matrix organization Knowledge, Skills, and Abilities: Detail-oriented, professional, and analytical Strong communication skills and computer literacy Hands-on and can-do attitude Fluent in German, English is a plus We offer: Work culture Flat hierarchies & creative freedom: Your ideas count and your work has a direct impact. Team spirit: A supportive, warm atmosphere with helpful colleagues. Onboarding & Development: Comprehensive onboarding: An induction plan, mentoring and support right from the start. Career development: Continuous training, individual career planning and global project work. Benefits Attractive salary package with notebook and mobile phone 30 days holiday per year for a good work-life balance Company pension scheme Group accident insurance Corporate benefits Urban Sports membership E-bike leasing discount Home office options