Our client is seeking a skilled Senior Systems & Test Engineer to define, build, and maintain processes for the integration and testing of cells, modules, and high-voltage batteries across multiple projects. This role spans concept development through to industrialisation and serial production, supporting hybrid and electric vehicle programmes. The Senior Systems & Test Engineer will: Develop strategies and methodologies for testing cells, modules, and battery packs. Define engineering approaches for various battery technologies and project requirements. Lead fault-finding and standardisation of solutions for inline and end-of-line testing. Specify, commission, and improve test rigs and diagnostic tools. Use CAN-based software (e.g. CANalyser, CANape, CANoe, Tera Term) for diagnosis and problem-solving. Prepare engineering documentation including PFMEAs, control plans, SOPs, and test reports. The Senior Systems & Test Engineer will have: Degree (or equivalent experience) in Electrical, Electronics, Controls, or Mechatronics Engineering. Proficiency in MATLAB and CAN-based diagnostic tools. Knowledge of battery system architecture and battery management systems. Experience in electrical component integration and development, particularly high-voltage systems. Familiarity with compliance engineering to standards such as EMC, functional safety, ISO26262. Ability to interpret wiring diagrams and liaise effectively with customers, suppliers, and build teams. This role offers the chance to work at the forefront of battery development, contributing to cutting-edge projects in hybrid and electric mobility. If you're passionate about solving complex engineering challenges and want to make a tangible impact in a fast-evolving industry, this is a fantastic opportunity to grow your career and shape the future of energy systems