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Radiant

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Raised $300M Series D on December 18, 2025

Raised $300M Series D on December 18, 2025

Radiant is building the world’s first mass-produced portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1 MW failsafe microreactor that can be transported anywhere power is needed. Founded in 2020, Radiant plans to test its first reactor in 2026, with initial customer deployments beginning in 2028.

Los Angeles, United States

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$300M Series C

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Energy

·

Onsite

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51–200

Manufacturing Engineer - 2026 New Graduate

El Segundo, CA · Posted on Mar 17, 2026

Senior Power Electronics Engineer

El Segundo, CA · Posted on Mar 17, 2026

Manager of Quality Control

El Segundo, CA · Posted on Mar 16, 2026

Senior Mechanisms Engineer

El Segundo, CA · Posted on Mar 13, 2026

Senior Software Engineer

El Segundo, CA · Posted on Mar 13, 2026

Production Planner

El Segundo, CA · Posted on Mar 13, 2026

Summer 2026 Internship - Software Engineering

El Segundo, CA · Posted on Mar 12, 2026

Mechanical Engineer, Structures - 2026 New Graduate

El Segundo, CA · Posted on Mar 10, 2026

Mechanical Engineer, Mechanisms - 2026 New Graduate

El Segundo, CA · Posted on Mar 10, 2026

Mechanical Engineer, Fluid Systems - 2026 New Graduate

El Segundo, CA · Posted on Mar 10, 2026

Receiving Inspector

El Segundo, CA · Posted on Mar 9, 2026

Senior Manager, Legislative Affairs

Washington, D.C. · Posted on Mar 6, 2026

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