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 Customer Quality Engineer - ESS (all genders) for our team Are you interested in a job that involves interacting with people, where emotions, understanding and friendliness play a major role? If you enjoy working with people from many different countries and cultures and your profile matches our requirements, you are flexible and able to work under pressure, and you also enjoy travelling internationally to a certain extent, then this position with us might even be the "best match" for you. Your tasks: You will support an assigned clientele with regard to customer-related quality issues You will process customer complaints together with the responsible departments in Europe and China You regularly take part in meetings with customers and internal departments You maintain customer portals for the defined quality topics You ensure that customer-related requirements are up to date and check the requirements for changes You ensure on-site activities with our customers Your profile: You have a successfully completed degree in engineering, a comparable degree or completed training, preferably in the electrical engineering/photovoltaic sector You have at least 2 years of professional experience in a similar position and/or as a customer project manager (preferably with an assigned customer base) You are confident in using MS Office and are familiar with B2B customer portals You are able to communicate confidently in an international environment thanks to your good command of English and strong communication skills You are characterized by an independent way of working and a high degree of flexibility The position requires a willingness to travel internationally 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