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 Product Engineer - Energy Storage Systems (ESS) (all genders) for our team! Job Purpose: Product Engineer for Energy Storage Systems is a critical contributor to the technical series support of current and upcoming projects. The Product Engineer will work in a global cross functional matrix organization consisting of systems, hardware, software, mechanical, validation etc. for energy storage system deployment. This includes coordinating the efforts of team members and third-party contractors or consultants in order to sustain battery products according to plan and expectation of the customer. The Product Engineer will also execute the project’s technical objectives and oversee quality control throughout its life cycle. The focus for this position lies on battery based energy storage system solutions ranging from residential battery systems for PV installations up until multi modular HV container solutions for grid stabilization and industrial applications. Responsibilities: Serves as the primary technical interface between customers and A123's internal multi-functional engineering and quality teams Responsible for technical series development & support in all areas throughout the product life cycle Coordinate and report on issues that arise during the lifecycle Maintain scheduled engineering deliveries, updates, and bug fixes with support from the global engineering team Organize regular cross-departmental meetings, including preparation and follow-up Coordinate mitigation and improvement actions with internal development departments Support new product development with product specification, coordination of cell/module/package development, evaluation of life cycle behavior, and collaboration to continuously improve products Support the acquisition of new projects by maintaining a strong relationship with customers and maintaining their confidence in A123 products Education & Experience: Completed engineering degree in the field of electrochemical engineering, industrial engineering, electrical engineering, or equivalent (Master's degree) 5 years of engineering experience preferred Battery system and/or grid application/PV industry experience preferred Familiar with battery system development through battery validation, mechanical design, thermal management, and also BMS, EMS, PCS Solid problem-solving and troubleshooting skills, including experience leading a triage team Knowledge, Skills, and Abilities: Basic understanding of program management, quality, and manufacturing operations Ability to identify customer needs and translate them into a successful business proposal Strong communication and presentation skills Must be a creative thinker who will take full accountability Must be a team player who thrives in a start-up culture with minimal or developing policies and procedures, and is comfortable sharing opinions with all levels of management Must be outwardly enthusiastic and self-motivated Excellent English language skills, fluent German 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