Developer Thermal Design

Join our Team Join our Team About This Opportunity Ericsson is opening a state‑of‑the‑art R&D center in Yokohama to deliver Japan‑driven radio products that shape networks worldwide. We are looking for a Senior Thermal Designer to join one of the best Thermal Design teams in the world, developing cutting‑edge radio products for 5G and future 6G networks.

In this role, you will deliver competitive thermal solutions under high-volume production and short time-to-market constraints, directly impacting product size, weight, and lifetime. You will collaborate closely with a global community of 30+ talented designers across Sweden, China, and Canada, as well as local vendors and cross-functional engineering teams. If you are eager to learn, grow, and collaborate across disciplines, are you in?

You will

• Collaborate and work with other thermal designers globally, contributing to a creative and supportive team culture
• Conduct Computational Fluid Dynamics (CFD) simulations to support creative development of complex electronic assemblies using state‑of‑the‑art tools
• Validate simulation results through lab testing and prototype evaluations to ensure thermal performance
• Generate clear technical reports, summarizing simulation outcomes, test results, and recommendations, and present numerical and experimental findings to stakeholders across R&D, system, and product management.
• Support troubleshooting and customer cases when thermal issues arise, participating in task forces, RCAs, and design improvements
• Work closely with system, RF, PA, mechanics, materials, power, production, and other functions to secure end‑to‑end optimized thermal solutions for Ericsson radio products
• Help drive continuous improvement in tools, methods, and processes for thermal simulation and verification, leveraging global best practices and common processes
• Take responsibility for your own development, actively sharing lessons learned and contributing to the global thermal roadmap and technology evolution

You will bring

• M.Sc. or Ph.D. in fluid dynamics, thermal engineering, aerospace, or a closely related field
• 5-10 years of experience in simulations & measurements
• Good scripting skills (e.g. C, MATLAB, Python) to automate workflows, post‑processing, and data analysis; experience with AI/ML libraries is a plus
• Good understanding of heat and mass transfer and fluid dynamics principles, and how they apply to electronic cooling from component to product level
• Strong skills in building CFD models with appropriate simplifications that still represent reality, using tools such as FloTherm, Celsius EC, Fluent or equivalent
• General knowledge and interest in the ICT industry is a plus
• Enjoyment of working in cross‑functional, international and multi‑site teams
• Curiosity and an internal drive to take on new challenges
• Confidence to take fact-based, timely, and courageous decisions without letting prestige get in the way
• Enjoyment of knowledge sharing and contributing to a strong global thermal community, aligning technology strategies and solutions across different sites
• Ability to communicate in spoken and written English; Japanese language skills are an advantage