Exowatt is a next generation renewable energy company offering commercial and industrial customers a modular full-stack energy solution that can provide dispatchable power and heat for up to 24 hours per day, specifically designed to meet the needs of energy-intensive applications such as data centers. Our mission is clear, to make sustainable renewable energy always available and almost free.
Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are seeking an exceptional Engine Test & Development Engineer with deep expertise in testing reciprocating engines, to lead the development and optimization of our heat engine systems. This is a hands-on role and will involve testing, design, analysis, assembly and disassembly of Stirling engines. This role is critical to our mission of delivering reliable, cost-effective renewable energy at scale. You will be at the forefront of modernizing the next generation of stirling engine technology for modern energy applications, working directly with our thermal storage systems to convert stored heat into dispatchable electricity.
This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance.
What We Offer:
Competitive salary and equity options.
Comprehensive benefits package, including health, dental, and retirement plans.
A dynamic work environment that fosters creativity and innovation.
Opportunities for professional growth and development in a rapidly evolving industry.
Relocation assistance.
Key Responsibilities
Design, develop and optimization power conversion unit system, with primary focus on Stirling engine configurationsParticipate in test cell and test engine performance improvements in terms of engine efficiency, reliability, and power density for 24/7 operationIntegrate heat engines with our proprietary thermal storage systems and power generation infrastructureEstablish and validate thermodynamic models for engine performance across varying temperature differentials and operating conditions
System Design & DevelopmentDesign and optimize critical engine components including pistons, cylinders, regenerators, heat exchangers, and linear alternator systemsDevelop innovative solutions for hermetic sealing, working fluid management, and pressure vessel designParticipate in material selection for high-temperature applications, focusing on durability over 30-year operational lifespansAssist in the development of modular engine architectures to enable rapid deployment & scalability.
Manufacturing & ProductionCollaborate with manufacturing teams to transition designs from prototype to mass productionEstablish quality control standards and testing protocols for engine components and assembliesDrive design for manufacturability (DFM) initiatives to reduce costs while maintaining performanceSupport domestic supply chain development for critical engine components
Testing & ValidationDevelop comprehensive test plans for engine performance, durability, reliability and validation testingLead root cause analysis and failure mode investigationsEstablish predictive maintenance protocols and condition monitoring systemsOversee field testing and commissioning of engine systems at customer sites
Required Qualifications
Education & ExperienceBachelor's degree in Mechanical Engineering or related field; Master's or PhD preferredExperience designing, testing, sensors, data acquisition system and engine test cell development. Demonstrated expertise in leveraging engine system simulations (1D simulations) for engine hardware development.Track record of bringing engine systems from concept through production
Technical ExpertiseDeep understanding of thermodynamic cycles, particularly Stirling, Otto, and Rankine cyclesExpertise in data acquisition systems, engine test cell development and operation, engine controls, experimental data analysis.Proficiency in one or more of engine modeling and simulation tools: SAGE, GT-Power, SIMSCAPE, SIMULINK, ANSYS, or similar.Experience with high-temperature materials and thermal management systems, and heat exchanger design.Knowledge of power generation systems and grid integration
Skills & CompetenciesStrong analytical and problem-solving abilities with focus on first-principles thinkingExperience with Design of Experiments (DOE) and statistical analysis methodsProficiency in CAD software (SolidWorks, CATIA, or similar)Understanding of manufacturing processes including casting, machining, and assemblyExcellent communication skills with ability to present complex technical concepts clearly
Preferred Qualifications
Previous experience in renewable energy, concentrated solar power (CSP), or thermal storage systemsBackground in developing engines for stationary power generation applicationsExperience with alternative engines, free-piston stirling engines, kinematic stirling engines, and/or linear alternator systemsKnowledge of engine control systems and engine power electronics integrationTrack record of patents or publications in reciprocating engine technologyExperience with modular system design and containerized solutionsFamiliarity with data center power requirements and reliability standards (99.999% uptime)