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Senior Fluid Systems Engineer - Thermodynamic Cycle & System Design

Approach Venture LLC

Hawthorne, California • Today

Full-time

USD 180,000.00 - 230,000.00 per year

Job Details

Skills

Systems Engineering
Manufacturing
Testing
Systems Analysis
MASS
Quality Assurance
Process Flow
IDS
System Requirements
Management
Interfaces
Product Development
Mechanical Engineering
Aerospace
Chemical Engineering
Thermodynamics
Fluid Mechanics
Heat Transfer
Python
Modeling
Process Simulation
Instrumentation
Analytical Skill
Computer Hardware
Communication
Collaboration
P&ID
Systems Design
Performance Analysis
System Integration
Startups
Hardware Development
Energy
Systems Architecture
Insurance
Roadmaps

Systems Engineering
Manufacturing
Testing
Systems Analysis
MASS
Quality Assurance
Process Flow
IDS
System Requirements
Management
Interfaces
Product Development
Mechanical Engineering
Aerospace
Chemical Engineering
Thermodynamics
Fluid Mechanics
Heat Transfer
Python
Modeling
Process Simulation
Instrumentation
Analytical Skill
Computer Hardware
Communication
Collaboration
P&ID
Systems Design
Performance Analysis
System Integration
Startups
Hardware Development
Energy
Systems Architecture
Insurance
Roadmaps

Summary

Senior Fluid Systems Engineer - Architect Advanced Thermal & Power Conversion Systems

Hawthorne, CA | On-site

Opportunity Summary

Join a venture-backed energy technology company developing advanced power generation systems designed to address growing global energy demands. This role will own the thermodynamic cycle and fluid systems architecture that serve as the foundation of a next-generation power platform. Working directly with the founding engineering team, you will define system operating conditions, develop cycle models, design fluid infrastructure, and support hardware integration through commissioning and testing. This position sits at the intersection of systems engineering, thermodynamics, and hardware development, requiring both analytical depth and practical engineering execution.

About Us

We are an early-stage energy technology company developing advanced power generation and conversion systems for future energy infrastructure. The team combines deep expertise across turbomachinery, thermal systems, manufacturing, and testing to build scalable hardware capable of addressing growing power demands. With active hardware development underway and significant technical milestones ahead, this is an opportunity to play a foundational role in shaping a complex energy system from the ground up.

Job Duties

Lead thermodynamic cycle modeling and fluid system analysis for a high-power energy platform
Define system state points, mass flow requirements, operating conditions, and performance targets
Develop steady-state and transient models to evaluate system behavior across the operating envelope
Serve as the primary systems interface between turbomachinery, controls, structures, and test engineering teams
Lead development of process flow diagrams, P&IDs, and fluid system architectures
Specify and select valves, instrumentation, piping, fittings, tubing, and supporting balance-of-plant hardware
Establish system requirements and manage critical subsystem interfaces
Support commissioning, validation, troubleshooting, and test activities
Compare model predictions against hardware performance and drive design improvements based on test data
Contribute to long-term system architecture decisions and future product development efforts

Qualifications

Bachelor's degree or higher in Mechanical Engineering, Aerospace Engineering, Chemical Engineering, or a related field
Strong foundation in thermodynamics, fluid mechanics, and heat transfer
Experience developing thermodynamic, process, or cycle models for complex engineering systems
Experience using engineering analysis tools such as Python-based modeling environments, process simulation software, or equivalent platforms
Working knowledge of fluid system hardware, including valves, instrumentation, piping, fittings, and related components
Ability to translate analytical models into practical, buildable hardware systems
Strong communication skills and ability to collaborate across multidisciplinary engineering teams
Comfortable working in a fast-paced, hands-on engineering environment

Preferred Experience

Experience with advanced thermodynamic cycles, real-gas systems, or high-pressure fluid processes
Development of industrial process systems, thermal plants, or power generation infrastructure
P&ID creation, equipment specification, and fluid system design
Pressure relief system design, overpressure protection analysis, and safety reviews
Familiarity with process or power piping codes and industry standards
Dynamic or transient system simulation experience
Turbomachinery performance analysis and system integration
Startup or early-stage hardware development experience

Why Join Us

Join a venture-backed company tackling one of the most challenging problems in energy and power generation
Own a foundational system that directly influences every major engineering discipline across the product
Work alongside experienced founders and multidisciplinary engineering leaders
Significant technical ownership and influence over system architecture
Meaningful equity ownership
Medical, dental, and vision insurance
Fully stocked kitchen with snacks, coffee, and lunch
Opportunity to help shape a growing engineering organization and future product roadmap

Compensation Details

$180,000 - $230,000

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.

Dice Id: 80183540
Position Id: 6c5c8dbdd5b5ce960b17bcdc2e09398e
Posted 30+ days ago

Fitment

Dice Job Match Score™

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El Segundo, California

•

Today

About Radiant Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. R

Full-time

USD 158,000.00 - 219,450.00 per year

Senior Propulsion and Energetics Thermofluids Engineer

Los Angeles, California

•

Today

Turning Space into a Transportation Layer for Earth Who We Are: Inversion builds advanced reentry systems to deliver next-generation capabilities from space. Our mission is to make Earth radically more accessible by turning Low-Earth Orbit into an on-demand logistics domain. We see space not as a destination, but as a platform - one that unlocks unprecedented speed and global reach. Our spacecraft are designed to deliver payloads anywhere on Earth in under an hour, operating through extreme re

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USD 137,000.00 - 193,000.00 per year

Senior Fluid Systems Engineer

Long Beach, California

•

Today

At Relativity Space, we're building rockets to serve today's needs and tomorrow's breakthroughs. Our Terran R vehicle will deliver customer payloads to orbit, meeting the growing demand for launch capacity. But that's just the start. Achieving commercial success with Terran R will unlock new opportunities to advance science, exploration, and innovation, pioneering progress that reaches beyond the known. Joining Relativity means becoming part of something where autonomy, ownership, and impact ex

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USD 132,000.00 - 198,000.00 per year

Vehicle Fluid Systems Engineer II

Long Beach, California

•

Today

Full-time

USD 104,000.00 - 156,000.00 per year

Job Details

Skills

Systems Engineering
Manufacturing
Testing
Systems Analysis
MASS
Quality Assurance
Process Flow
IDS
System Requirements
Management
Interfaces
Product Development
Mechanical Engineering
Aerospace
Chemical Engineering
Thermodynamics
Fluid Mechanics
Heat Transfer
Python
Modeling
Process Simulation
Instrumentation
Analytical Skill
Computer Hardware
Communication
Collaboration
P&ID
Systems Design
Performance Analysis
System Integration
Startups
Hardware Development
Energy
Systems Architecture
Insurance
Roadmaps

Systems Engineering
Manufacturing
Testing
Systems Analysis
MASS
Quality Assurance
Process Flow
IDS
System Requirements
Management
Interfaces
Product Development
Mechanical Engineering
Aerospace
Chemical Engineering
Thermodynamics
Fluid Mechanics
Heat Transfer
Python
Modeling
Process Simulation
Instrumentation
Analytical Skill
Computer Hardware
Communication
Collaboration
P&ID
Systems Design
Performance Analysis
System Integration
Startups
Hardware Development
Energy
Systems Architecture
Insurance
Roadmaps

Summary

Lead thermodynamic cycle modeling and fluid system analysis for a high-power energy platform
Define system state points, mass flow requirements, operating conditions, and performance targets
Develop steady-state and transient models to evaluate system behavior across the operating envelope
Serve as the primary systems interface between turbomachinery, controls, structures, and test engineering teams
Lead development of process flow diagrams, P&IDs, and fluid system architectures
Specify and select valves, instrumentation, piping, fittings, tubing, and supporting balance-of-plant hardware
Establish system requirements and manage critical subsystem interfaces
Support commissioning, validation, troubleshooting, and test activities
Compare model predictions against hardware performance and drive design improvements based on test data
Contribute to long-term system architecture decisions and future product development efforts

Qualifications

Bachelor's degree or higher in Mechanical Engineering, Aerospace Engineering, Chemical Engineering, or a related field
Strong foundation in thermodynamics, fluid mechanics, and heat transfer
Experience developing thermodynamic, process, or cycle models for complex engineering systems
Experience using engineering analysis tools such as Python-based modeling environments, process simulation software, or equivalent platforms
Working knowledge of fluid system hardware, including valves, instrumentation, piping, fittings, and related components
Ability to translate analytical models into practical, buildable hardware systems
Strong communication skills and ability to collaborate across multidisciplinary engineering teams
Comfortable working in a fast-paced, hands-on engineering environment

Preferred Experience

Experience with advanced thermodynamic cycles, real-gas systems, or high-pressure fluid processes
Development of industrial process systems, thermal plants, or power generation infrastructure
P&ID creation, equipment specification, and fluid system design
Pressure relief system design, overpressure protection analysis, and safety reviews
Familiarity with process or power piping codes and industry standards
Dynamic or transient system simulation experience
Turbomachinery performance analysis and system integration
Startup or early-stage hardware development experience

Why Join Us

Join a venture-backed company tackling one of the most challenging problems in energy and power generation
Own a foundational system that directly influences every major engineering discipline across the product
Work alongside experienced founders and multidisciplinary engineering leaders
Significant technical ownership and influence over system architecture
Meaningful equity ownership
Medical, dental, and vision insurance
Fully stocked kitchen with snacks, coffee, and lunch
Opportunity to help shape a growing engineering organization and future product roadmap

Compensation Details

$180,000 - $230,000

Dice Id: 80183540
Position Id: 6c5c8dbdd5b5ce960b17bcdc2e09398e
Posted 30+ days ago

Fitment

Dice Job Match Score™

🔢 Crunching numbers...

Create job alert

Never miss an opportunity! Create an alert based on the job you applied for.

El Segundo, California

•

Today

Full-time

USD 158,000.00 - 219,450.00 per year

Senior Propulsion and Energetics Thermofluids Engineer

Los Angeles, California

•

Today

Full-time

USD 137,000.00 - 193,000.00 per year

Senior Fluid Systems Engineer

Long Beach, California

•

Today

Full-time

USD 132,000.00 - 198,000.00 per year

Vehicle Fluid Systems Engineer II

Long Beach, California

•

Today

Full-time

USD 104,000.00 - 156,000.00 per year

Senior Fluid Systems Engineer - Thermodynamic Cycle & System Design

Skills

Summary

Dice Job Match Score™

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Senior Fluid Systems Engineer - Thermodynamic Cycle & System Design

Job Details

Skills

Summary

Dice Job Match Score™

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