Thermofluids Engineer

Job description

Last Energy is a pioneering US technology company focused on fleet-wide deployment and operation of next-generation nuclear assets. We are revolutionizing nuclear power delivery for rapid deployment and scalability. We are seeking a highly skilled, high-impact **Thermofluids Engineer** to own the end-to-end development and analysis of the critical thermal-fluid systems that unlock the productization of our micro nuclear power plant. This is a role for **builders, doers, and innovators** who thrive in a fast-paced, hands-on environment where your ideas directly shape the product. ### Key Duties & Responsibilities - **Lead the conceptual design, analysis, and execution** of critical thermal system components and loops for our advanced power plant systems. - **Drive multiscale thermal-fluid analysis** for complex internal turbulent flows, balancing high-fidelity CFD models with efficient system-level codes to validate and optimize designs. - **Own the development and validation** of Computational Fluid Dynamics (CFD) and system-level thermal-hydraulic models to ensure structural stability, performance, and design safety across key reactor components. - **Contribute directly to the design and optimization** of critical thermal components including heat exchangers, piping networks, fluid storage tanks, and other pressure-boundary equipment based on rigorous thermal performance requirements. - **Collaborate daily with a multidisciplinary team** (Mechanical, Nuclear, and Systems Engineers) to integrate thermal-fluid solutions into cohesive, plant-level designs. - **Perform structural, thermal, and fluid analyses** using advanced simulation tools (FEA, CFD) to validate and optimize designs for manufacturability and deployment speed. - **Operate autonomously**, driving projects from concept to analysis and final design verification in a startup culture that values speed, ingenuity, and accountability. ### Qualifications - Proven experience as a Thermofluids Engineer (or similar analytical role) focusing on the development and analysis of thermal systems components within power plant, nuclear, or complex industrial systems. - **Expert proficiency** in Computational Fluid Dynamics (CFD) software (e.g., ANSYS Fluent, STAR-CCM+, OpenFOAM) and system-level thermal-hydraulic codes. - **Adept at solving complex thermal and fluid dynamics challenges** utilizing advanced techniques and simulation software. - Strong foundational knowledge of heat transfer, fluid mechanics, and thermodynamics, with a deep understanding of internal turbulent flow phenomena. - Ability to perform in-depth multiscale analyses of heat transfer at both the component and system levels. - Excellent analytical, problem-solving, and decision-making skills, with a focus on delivering high-quality, actionable results. - Strong communication skills and a willingness to work collaboratively in a cross-functional, startup team environment.