Last Energy · 2 months ago
Thermofluids Engineer
Austin, TX
Full-time
Onsite
Senior LevelLast Energy is a pioneering US technology company focused on fleet-wide deployment and operation of next-generation nuclear assets. They are seeking a highly skilled Thermofluids Engineer to own the end-to-end development and analysis of critical thermal-fluid systems for their micro nuclear power plant.
Clean EnergyEnergyEnergy ManagementNuclearRenewable EnergySustainability
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
Qualification
Required
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
Company
Last Energy
Last Energy is a nuclear technology company that provides nuclear energy through its modular micro nuclear power plants.
Founded in 2020
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$164MKey Investors
Astera InstituteGigafundFirst Round Capital
2025-12-16Series C· $100M
2024-08-29Series B· $40M
2021-02-16Series A· $20M
Leadership Team
Bret Kugelmass
CEO, Founder
Recent News
alleywatch.com
2025-12-24
2025-12-20
2025-12-19
Company data provided by crunchbase