Radiant · 2 weeks ago
Software Engineering Manager - Simulation
El Segundo, CA
Full-time
Onsite
Senior Level
7+ years expRadiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The Software Engineering Manager for Simulation will build and lead the engineering team responsible for reactor physics modeling and simulations, ensuring the simulation infrastructure supports the design, testing, and validation of reactor systems.
Clean EnergyEnergyEnergy EfficiencyRenewable Energy
No H1B
U.S. Citizen Only
Responsibilities
Build, lead, and mentor a team of simulation engineers developing thermal, hydraulic, and nuclear models for reactor and reactor subsystem physics
Guide technical architecture and implementation for simulation systems
Scale software infrastructure to support Digital Twin simulation, visualization, and data processing capabilities
Define and own the technical roadmap for thermal and safety analysis simulation. Develop and execute a strategy for model tuning as models and model frameworks change
Foster a culture of technical excellence by establishing best practices for simulation software development, code quality, and testing
Collaborate cross-functionally with Hardware, Nuclear, and Electrical engineering teams to accelerate software-in-the-loop and hardware-in-the-loop testing capabilities
Own team delivery of mission-critical internal simulation products while ensuring sustainable development practices and technical debt management
Recruit, develop, and retain top engineering talent and build a high-performance team culture
Qualification
Required
7+ years of professional software engineering experience with significant depth in simulation, scientific computing, or physics-based modeling
2+ years of people management experience leading engineering teams
Strong technical background in programming languages such as Python, Rust, C#, or C/C++, with the ability to review code and guide architectural decisions
Experience building and scaling highly technical engineering teams
Familiarity with simulation tools, physics-based modeling, numerical methods, or computational science sufficient to guide technical strategy
Familiarity with numerical solvers, visualization frameworks, and automated testing approaches for scientific software
Strong foundation in software engineering best practices, including version control, code review, and CI/CD pipelines
Proven ability to balance hands-on technical contributions with team leadership and people development
Bachelor's degree in physics, mechanical engineering, computer science, or a similar field, or equivalent experience
Preferred
Advanced degree (Master's or Ph.D.) in physics, mechanical engineering, computer science, or a similar field
Experience managing teams working on simulation or computational modeling, parallel computing, or high-performance computing
Background with modern simulation frameworks, finite element analysis, or computational fluid dynamics tools
Track record of successful cross-functional collaboration with Hardware, Nuclear, and Electrical engineering teams
Strong communication and stakeholder management skills with the ability to translate technical complexity for diverse audiences
Experience with Machine Learning, Deep Learning, AI, or other probabilistic modeling techniques
Benefits
Substantial incentive stock plan for all full-time employees.
100% premium coverage for base Silver level plan for employee + 50% premium coverage for dependents. Platinum plans available.
Sponsored memberships for eligible employees and their dependents.
100% premium coverage for top tier plan + 50% for dependents.
100% premium coverage for top tier plan (including orthodontia) + 50% for dependents.
Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Company and team-bonding events, happy hours and in-person camaraderie.
Beautiful El Segundo headquarters close to the Pacific Ocean.
Company
Radiant
Radiant develops portable nuclear microreactors designed to generate electricity and heat in a compact, factory-built form.
51-200 employees
Funding
Current Stage
Late StageTotal Funding
$518.82MKey Investors
Andreessen HorowitzUnion Square Ventures
2025-12-17Series D· $300M
2024-11-14Series C· $165M
2023-04-18Series B· $40M
Leadership Team
Doug Bernauer
Chief Executive Officer
Recent News
2026-01-07
The Motley Fool
2026-01-04
Globe and Mail
2026-01-03
Company data provided by crunchbase