Thermal Systems & Mechanical Engineer

About the role

Flux Mobility AG develops electric light commercial vehicles in small, responsible teams. It is looking for an experienced Thermal Systems & Mechanical Engineer to take technical ownership of the thermal management of its electric vehicles and the mechanical design that goes with it. The engineer owns the thermal architecture: battery cooling and heating, power electronics and e-motor cooling, cabin climate, and the coolant and refrigerant circuits that connect them.

Key responsibilities

• Size and design cooling and heating systems, including pumps, valves, radiators, chillers, heat exchangers, expansion tanks, lines and heat pump and refrigerant circuits.
• Carry out thermal sizing and simulation (1D system simulation and, where needed, CFD) and correlate models against component and vehicle test data.
• Design and integrate the mechanical hardware of the thermal system into the vehicle (packaging, mounting, routing and interfaces to the vehicle structure).
• Define the thermal requirements and operating strategy together with the software team.
• Plan and lead thermal verification and validation: component tests, climatic-chamber testing and on-vehicle testing in hot and cold conditions, with external partners.
• Work with suppliers of thermal components (compressors, pumps, heat exchangers, HVAC units) on selection, specification and validation.
• Support aftersales and the field team with thermal-related field issues and root-cause analysis, and analyse test and field data to improve the design.

Required profile

• Degree in mechanical engineering, automotive engineering, mechatronics, process/energy engineering or a comparable discipline.
• At least 5 years of industry experience in thermal systems or thermal management, ideally in automotive or a similarly demanding industry.
• Practical experience with battery cooling, HVAC/climate, refrigerant circuits or heat pump systems.
• Solid mechanical design skills and a good understanding of fluid systems such as pumps, valves, heat exchangers and coolant/refrigerant circuits.
• Experience working with suppliers and development partners, and ability to take technical ownership of complex systems.

Required skills

• Thermal and 1D system simulation tools such as GT-SUITE, KULI, Simcenter Amesim or Simscape
• Correlating simulation models to test data
• Mechanical design and packaging of thermal systems