Software Engineer, Radiant Nuclear

2027 New Graduate

$105-130k

Offers Equity

Python

C++

Spring

Git

Entry level

Los Angeles

Office located in El Segundo, CA

Making nuclear power portable

Be an early applicant

Making nuclear power portable

201-500 employees

B2BEnergySustainabilityManufacturing

Be an early applicant

$105-130k

Offers Equity

Python

C++

Spring

Git

Entry level

Los Angeles

Office located in El Segundo, CA

201-500 employees

B2BEnergySustainabilityManufacturing

Company mission

To bring one of the world's first factory-constructed microreactors to market.

Job

Company

Role

Who you are

BS or MS in Software Engineering, Controls Systems Engineering, or a related discipline
Graduating in December 2026 or Spring 2027
Familiarity with Python, C++, C#, or similar object-oriented programming languages
Basic knowledge of software development practices and version control tools such as Git

Desirable

Strong self-motivation and the ability to collaborate effectively in a team environment
Interest in contributing to simulation tools or working on software testing
Familiarity with distributed software development and common design patterns is a plus
A passion for physics, hardware, or electrical engineering is highly encouraged

What the job involves

Radiant is seeking a highly motivated Software Engineer to join the team
Assist in creating tooling to support a variety of simulation software packages
Contribute to internal software products that support simulation and analysis of simulation results

Our take

To support the clean energy revolution, Radiant Nuclear is developing a portable, containerised nuclear microreactor. Once launched, it will have the potential to provide power to remote parts of the world or act as a backup supply to vital infrastructure such as hospitals and data centres.

Typically, these backup systems are powered by diesel generators - making them extremely bad for the environment. Radiant's microreactors could allow the replacement of these generators whilst supplying the same critical asset support, enabling a substantial reduction in carbon footprint.

Having completed the design phase of the project, Radiant has taken a step closer towards realising its portable microreactor (known as Kaleidos). On the back of impressive Series D funding, the company intends to test a prototype as early as mid-2026 and has secured considerable funding to support its work towards that goal.

Kirsty

Company Specialist at Welcome to the Jungle

Company

Funding (last 2 of 7 rounds)

Dec 2025

$300m

SERIES D

May 2025

$165m

SERIES C

Total funding: $620.7m

Company benefits

Equity: Substantial incentive stock plan for all salaried employees
Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans
Vision: 100% coverage + 50% for dependents
Dental: 100% coverage, orthodontia extra, 50% for dependent
Flexible PTO policy
Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits
Team-bonding company outings, happy hours and in-person camaraderie
Beautiful El Segundo headquarters close to the Pacific Ocean

Company HQ

El Segundo, CA

Leadership

Doug Bernauer

(CEO)

Previously Senior Avionics Systems Engineer at Space Exploration Technologies and Applications Engineer at Rockwell Automation.

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