We are looking for a Battery Thermal Simulation & Cell Development Engineer to take ownership of thermal development across our battery systems while driving the evaluation and integration of next-generation lithium-ion cell technologies. This is a highly technical and impactful role, combining thermal modelling, CFD simulation, and cell technology scouting, supporting projects from early concept through validation and industrialisation. You will play a critical role in ensuring our systems meet aggressive targets for performance, safety, packaging, and thermal stability in high-demand environments such as motorsport and defense.
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You will play a critical role in ensuring our systems meet aggressive targets for performance, safety, packaging, and thermal stability in high-demand environments such as motorsport and defense. What You’ll Do Develop and maintain 1D thermal models for battery systems, modules, and cells
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Build and run 3D CFD simulations to analyse cooling performance and thermal behaviour
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Predict and optimise battery performance under high-power duty cycles and extreme conditions
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Design and improve thermal management systems (liquid, air, immersion, advanced concepts)
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Perform steady-state and transient simulations, correlating results with test data
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Identify thermal risks early and define pragmatic mitigation strategies
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Evaluate and benchmark new lithium-ion cell technologies and suppliers
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Lead technical discussions with suppliers on thermal behaviour, ageing, safety, and performance
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Support system architecture decisions, DVP definition, and validation activities
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Contribute to customer proposals, technical reviews, and cross-functional collaboration What You Bring Education & Experience Degree in Mechanical, Aerospace, Automotive Engineering, Physics, or similar
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3–8+ years of experience in battery thermal development, CFD, or thermal simulation
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Experience working with lithium-ion battery systems in high-performance environments Technical Skills Strong experience with 1D simulation tools (GT-SUITE, Simulink/MATLAB, Amesim)
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Hands-on experience with CFD tools (STAR-CCM+, ANSYS Fluent, Icepak, FloEFD, COMSOL)
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Solid understanding of: Heat transfer & fluid dynamics Thermal management systems Lithium-ion cell behaviour Experience in: Cell heat generation modelling Thermal runaway analysis Pack and module thermal behaviour Data analysis skills (Python, MATLAB, Excel) CAD understanding (CATIA, NX, SolidWorks) Languages Fluent English (written and spoken) Desirable Skills Experience with cylindrical cells (e.g. 21700) Background in motorsport, Formula 1, defense, or aerospace Experience correlating simulation with thermal chamber, dyno, or vehicle testing Exposure to high-power applications and aggressive thermal environments Experience interacting directly with cell manufacturers and technical suppliers About Bold Valuable Tech: Our Vision At Bold, we´re a diverse community, from all over the world and from multiple industries and backgrounds. Combining experience from Automotive, Motorsport, Aerospace and Aviation with skills from concept phase through to full product delivery. Our rapid expansion is a testament to our commitment to pushing boundaries and delivering cutting-edge solutions.
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We have two engineering divisions, different in their technologies but similarly focused on delivering compelling products to our customers. In our Applied Engineering division, we are an integral part of the design & development process for our highperformance customers including Formula 1, Motorsport and Automotive. From the initial stages of blanksheet designs to the final production, we assume ownership with a relentless commitment to bringing our clients' visions to life.
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We contribute across all areas of engineering and in multiple different specialisms including composite & materials, bodywork, aero & structural, powertrain, and tooling. In our Electrification division specializes in R&D; of state of the art of battery systems.
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Taking projects from initial concepts to production: we are designing, developing, testing, and manufacturing the next generation of high-performance batteries to innovative projects for multiple industries. We aim to generate a real impact on the future of electric mobility. Join us in shaping and improving the future of engineering excellence!
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Our Values Customer
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Obsession – be accountable, be communicative, be unforgettable
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Ownership – be engaged, be passionate, be committed, be reliable
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Integrity – be inspiring, be trustworthy, be supportive, be compassionate
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Boldness – be innovative, be confident, be fearless, be resilient, be authentic
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Excellence – be the best, be relentless, positive, be humble Diversity & Inclusion At Bold Valuable Technologies, we consider our people our chief competitiv