Senior Software Engineer, Radiant Nuclear

Data Platform

Salary not provided

Offers equity

SQL

Docker

Kubernetes

Python

Kafka

Airflow

C++

Rust

Redshift

Spark

Plotly

Grafana

Snowflake

Flink

Kinesis

BigQuery

Parquet

Git

Senior and Expert level

Los Angeles

More information about location

5 days a week in office (El Segundo, CA)

Making nuclear power portable

Open for applications

Making nuclear power portable

201-500 employees

B2BEnergySustainabilityManufacturing

Open for applications

Salary not provided

Offers equity

SQL

Docker

Kubernetes

Python

Kafka

Airflow

C++

Rust

Redshift

Spark

Plotly

Grafana

Snowflake

Flink

Kinesis

BigQuery

Parquet

Git

Senior and Expert level

Los Angeles

More information about location

5 days a week in office (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

Bachelor's degree in computer science or engineering
Expert proficiency in Python, Rust, R, C#, or C/C++
5+ years of software engineering experience in data platform engineering, pipeline development, or distributed data systems
Experience building data pipelines for hardware analysis, AI/ML workflows, or distributed processing
Experience with modern data platforms (Databricks, Snowflake, BigQuery, Redshift)
Familiarity with orchestration systems (Kubernetes, Argo Workflows, Airflow)
Experience with streaming technologies (Kafka, Kinesis, Pulsar)
Familiarity with Git, Docker, and CI/CD frameworks
Ability to work full-time from El Segundo, CA office
Must be willing to work extended hours and weekends as necessary to accomplish our mission
Must work 100% onsite at El Segundo HQ

Desirable

7+ years of software engineering experience in data platform engineering or distributed systems
Experience with hardware simulation or computational modeling
Experience in testing software and hardware systems
Experience with distributed software development and design patterns
Experience with data lake architectures, columnar formats (Parquet, ORC, Arrow), and table formats (Delta Lake, Iceberg, Hudi)
Familiarity with data visualization tools (Grafana, Plotly, Observable, Streamlit)
Experience with data governance and metadata management tools (DataHub, Amundsen)
Knowledge of distributed SQL systems (Presto, Trino, Spark)

What the job involves

Radiant is seeking a driven Software Engineer to architect and build data pipelines for analysis and simulation
In this role, you will enable software engineers and system REs from across the organization to quickly and easily interrogate simulation results and perform analysis on hardware design iterations
Your work will be a critical link between internal and third-party analysis tools and the teams making hardware and software design decisions
Architect data platforms and pipelines for design analysis using modern data engineering tools for scalable data processing
Design and maintain batch and streaming ETL pipelines using Spark, Kafka, Flink, Airflow, or similar frameworks
Implement data modeling and optimization strategies for analytical workloads across data lakes, warehouses, and real-time databases
Own data products end-to-end from requirements gathering through delivery and monitoring
Build data quality frameworks and monitoring systems to ensure reliability and observability
Develop pipelines for data transformation, aggregation, and feature engineering to support simulation and hardware design
Collaborate with simulation and mechanical engineering teams to understand workflows and data needs
Design APIs and data access layers for self-service analytics and programmatic access

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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