Back to Careers
Sveta Nedelja, HRV

Thermal Systems Engineer


Thermal Systems Engineer
Sveta Nedelja, Croatia

About us

We are a technology powerhouse that designs, engineers, and manufactures the world's most advanced automotive technology and hypercars. Bytes to bolts, Rimac is where everything happens.

Our teams develop and produce both hardware and software solutions for our flagship, record-breaking hypercar, the Nevera, as well as for other automotive manufacturers’ vehicles. Working on technology solutions for partners such as Porsche, Hyundai, Aston Martin, Koenigsegg, Automobili Pininfarina, and others, gives Rimac a unique position of a technology leader in the high-performance electric vehicle industry. The stakes are high.

As a fast-moving company, we nurture a high-performing culture. If you are interested in joining, you must be prepared for relentless learning, adapting, and embracing new technologies. We expect an easy-going person, but also self-driven, entrepreneurial, and highly independent in their work, that will enjoy rising to the challenge and have fun pushing the limits of technology.

Our expectations are high. And we can only achieve our goals with the dedication and collaboration of our exceptional team. Our ambition is to deliver and go the extra mile. We need to expand our already industry-leading team, find the best people, and lead the charge.

We are looking for an experienced Thermal Systems Engineer who will be a part of the Bugatti Rimac Aero-Thermal Team within the Vehicle Integration department, helping us to improve and broaden our capabilities in virtual and experimental development of various powertrain thermal systems. 


The team is cross-functional, working closely with all Research & Development departments, consisting of enthusiastic group of engineers focusing on a high performance and efficient system design, innovative solutions in development of the state-of-the-art vehicles. 


Within the role of Thermal Systems Engineer, we are searching for an engineer experienced in numerical and experimental development of the vehicle level powertrain thermal management systems with an emphasis on the AC refrigerant circuit. 


Besides the technical knowledge and strong grasp in fluid dynamics, thermodynamics, heat transfer and experience we are looking for a colleague that is proactive and communicative and has a creative yet analytical mindset capable of working in a fast-paced dynamic environment with minimal supervision. 

If you are passionate about engineering, physics, hypercars and applying your knowledge to solve complex engineering problems you would make an excellent fit to our team. 



  • Build, develop and maintain 1D thermal simulation model at full vehicle level with emphasis on AC and HVAC systems 

  • Integrate vehicle sub-systems into a single vehicle 1D model 

  • Couple various 1D and 1D-3D models (simplified CFD model, models built on Python or "C" language or MATLAB scripts)
  • Contribute to and apply improvements of methods and optimization tools to improve system efficiency 

  • Interact with other departments or suppliers to collect input data required for simulation boundaries and model build 

  • Provide suggestions and improvements based on analyzed virtual and experimental data 

  • Write technical documents, prepare presentations and communicate the results to higher leadership 

  • Support and mentor less experienced engineers 



  • More than 3 years of experience in automotive powertrain thermal management systems (numerical and experimental) 

  • Good knowledge of Fluid Dynamics, Thermodynamics, Heat Transfer 

  • Good knowledge of vehicle (hybrid and electric) powertrain systems 

  • Proven analytical abilities with at least one of the following modeling tools: MATLAB and Simulink, GT-SUITE, DYMOLA 

  • Good level of programming knowledge in relevant 1D tools to build and vary control parameters of electric and combustion powertrain components 

  • Good knowledge of English (written and spoken) 

  • Good communication, reporting and organizational skills 

  • Commit to project plan and deliverables 


 Considered as an advantage:

  • Master’s degree or above in related engineering discipline 

  • Experience in development of high-performance ICE, Electric and Hybrid vehicles 

  • Strong experience in integration and development of AC systems 

  • Applied experience in GT-Suite 

  • Good programming skills and previous experience with C++, MATLAB, Python, Linux 

  • Experience with CAD software 3D Experience/Catia 

What we are like and what we offer

  • We operate in a fast-paced and challenging environment
  • You will have the opportunity to work on world-class solutions with cutting-edge technology
  • We work a lot, but also know how to have fun (fun teambuilding, crazy company parties, kitchen and relaxation zones around the office, free coffee/tea and fresh fruit, etc.)
  • Family-like and open work environment (subsidies for kindergartens, Christmas parties for kids, and presents for kids)
  • Financial subsidy for transportation
  • Additional and supplementary healthcare covered
  • Internal educations program
  • Psychological counseling
  • Dog-friendly office
  • Flexible working hours and work-from-home days – up to 12 days of remote work per month
  • Discounts at stores and clinics – for humans and pets 😊

If you are a creative, problem solving, open-minded, highly-motivated individual and you love a fast-paced environment and are up for the challenge – where were you hiding?