Helion Energy
helionenergy.com
Actively hiring
Nuclear Engineering
Nuclear Energy
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Overview
News
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Total raised
$500M
1 round on record
Latest round
$500M
Venture round · Nov 2021 · 4 yr ago
Team
471
US Form 5500 (plan participants) · Dec 2025 · +51% in a year
Hiring now
51
+20 posted in 30 days
Backers
4
Y Combinator, Lightspeed Venture Partners
The money's age
Long since its last round
59 months since the last round · and hiring
Momentum
31/100
hiring for its size, in the news
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Jun 8
First executive search Technical Program Manager, Orion - Reporting to the CTO
2025
Team of 471 was 312 · US Form 5500 (plan participants)
Sep 30, 2023
Partnership Helion Energy Partners With Nucor Steel for 500MW Nuclear Fusion Power Plant in 2030 · nextbigfuture.com
May 10, 2023
On the Hacker News front page Helion’s fusion power purchase agreement with Microsoft · 172 points
Nov 9, 2021
Raised a round Venture round $500M
Jun 2014
Went through Y Combinator
2013
Founded
Tractionpublic signals, read monthly
Web presence
top 0.3%
of 133.2M domains by links, Common Crawl
Hacker News stories
11
best: 172 points
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Venture round | Nov 2021 | $500M | — | forbes.com |
Backed byfrom the funds' portfolios and accelerator catalogs
Y Combinator 
Lightspeed Venture Partners 
Peak XV Partners 
Silicon Valley Investclub Investors in similar startupsfunds that back the companies most like this one
backs Valar Atomics
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How Helion Energy hires
Truth index
A 93/100
Median time to fill
99 days
Ghost roles
0%
Stale roles
10%
Reposted roles
0%
Helion Energy scores A on the Alion truth index (A is best, E worst), measured over 40 open roles re-checked against its own hiring board: 0% look like ghost listings, 10% have gone stale and 0% are the same role posted again. Its roles close in a median of 99 days. It measures how much of what this employer publishes turns into a real, finite search - not the employer as a workplace. How the index is computed
Overview
Helion Energy is an American fusion power research company developing commercial clean energy technology. The firm focuses on building magneto-inertial fusion generators designed to harvest electricity directly through magnetic induction without relying on traditional steam turbines. By aiming to produce zero-carbon power from abundant fuel sources like deuterium and helium-3, it strives to deliver scalable and cost-effective baseload energy for the grid.
News
Helion clears key regulatory milestone on the path to building and operating the world's first fusion power plant
Helion has become the first company in the world to secure the regulatory licenses needed for a fusion power plant, following receipt of two licenses from the Washington Department of Health (DOH).
Read more
Report
Fusion Startup Helion Nearly Triples Valuation to $15.5 Billion in Thrive-led Round
Helion Energy, a nuclear fusion startup backed by OpenAI's Sam Altman, still has to prove it can produce electricity to serve data centers and other customers. But investors seem confident it can deliver. The Everett, Wash.-based company said it has raise
Read more
Report
A Sam Altman-backed start-up says it will deliver fusion electricity by 2029. One of its own co-founders says the physics may not work
This company says its pulsed plasma machine will deliver electricity to the grid by 2029. Some physicists warn that its promises are outrunning what the technology has proved
Read more
Report
Fusion startup Helion hits blistering temps as it races toward 2028 deadline
Helion's Polaris device hit 150 million degrees C recently, a milestone that nudges the company toward its commercial power plant that will sell electricity to Microsoft.
Read more
Report
Helion Achieves New Industry-First Fusion Energy Milestones, Accelerating Path to Commercial Fusion
Polaris becomes first privately funded fusion energy machine to operate with deuterium-tritium fuel, sets record with plasma temperatures of 150MC
Read more
Report
"This Is The $400 Million Gamble On Fusion Power" Helion Energy's First Nuclear Plant In Washington Promises Zero-Carbon Electricity For Microsoft
As the world grapples with the urgent need for sustainable energy solutions, a new project in Washington state is attempting to turn the tide. Helion Energy,
Read more
Report
Everett-based Helion breaks ground on 'world's first fusion power plant'
On the banks of the Columbia River in the small town of Malaga, Washington, Everett-based Helion has broken ground on what it says is
Read more
Report
Helion Secures Land and Begins Building on the Site of World's First Fusion Power Plant
Helion announces that it has broken ground on the world's first commercial fusion power plant in Chelan County, Washington.
Read more
Report
Show more news
Tech stack
Technologies named in job postings at Helion Energy over the last 12 months, by layer, with the share of postings for each.
Technologies in use
73
Postings analysed
41
Stack modernity
85/100AI adopter
Languages
Python54%
MATLAB22%
C++15%
Fortran7%
Frameworks & libraries
Flink2%
Next.js2%
React.js2%
Databases
InfluxDB5%
PostgreSQL2%
Cloud & platforms
Linux15%
AWS10%
Azure10%
Grafana10%
AI & ML
LLM5%
ChatGPT2%
Claude2%
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Full Helion Energy tech stack
73 technologies · by team · pay by technology · changes · similar stacks
Salary insights
Compensation ranges based on this company's open jobs
Median
$214k
Typical range
$82k – $320k
Open positions
51
49
Jobs
Intern
12.2%
Junior
6.1%
Middle
12.2%
Senior
49%
Staff
4.1%
Principal
14.3%
Architect
2%
| Level | Jobs | Median | Typical range |
|---|---|---|---|
| Intern | 6 | $114k | $96k – $118k |
| Junior | 3 | $200k | $182k – $240k |
| Middle | 6 | $133k | $82k – $220k |
| Senior | 24 | $225k | $98k – $290k |
| Staff | 2 | $180k | $168k – $192k |
| Principal | 7 | $270k | $250k – $317k |
| Architect | 1 | $320k | $320k |
Highest paying role
Director of Engineering, Modules
$320k
Normalized to USD per year
All salaries at Helion Energy
By role, level and city, against the market · 51 jobs with pay
Growth
Hiring Momentum
75/100
Scaling fast
Open positions
51
23 opened / 15 closed in 30 days
Median time-to-fill
96 days
faster than 14% of the market
ATS activity
Every ~4 hours
Today
Hiring Dynamics
+100%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
Industrial Engineering
44% ▼
Field & Service
12% ▲
Backend
6% ▼
Management
6% ▼
Operations
6% ▼
DevOps
4%
Actively hiring for Industrial Engineering (+8 in 30 days)
Activity Timeline
Added SIEM to stack
Oct 2026
Added Rest API to stack
Oct 2026
Added PKI to stack
Oct 2026
Added Microsoft Sentinel to stack
Oct 2026
Added Least Privilege to stack
Oct 2026
Added Jira to stack
Oct 2026
Added Outlook to stack
Oct 2026
Added KiCad to stack
Sep 2026
Added EtherCAT to stack
Sep 2026
Added Microsoft Excel to stack
Sep 2026
Added TCP/IP to stack
Sep 2026
Added Waterfall to stack
Sep 2026
Offices
Where the company hires and what each office is for
Cities
2
Hiring now
2
Countries
1
Busiest office
Everett
Loading the map
Headquarters
Builds here
Office with open vacancies
Tap a pin for the office
Everett
United States
HQ
52 open roles 44 posted in 90 days 35% engineering 500-1000 est. staff $200k Avg Salary
hires for Industrial Engineering, Hardware, Field & Service
Seattle
United States
Plant / site
5 open roles 9 posted in 90 days 40% engineering 50-200 est. staff $165k Avg Salary
hires for DevOps, Analytics, Communications
Jobs
$148k – $191k per year • In office • Full-Time • 8+ years exp • Seattle
Python
JavaScript
PowerShell
Rest API
Cybersecurity
Microsoft Sentinel
Least Privilege
Microsoft Entra ID
Active Directory
PKI
SIEM
Management
Jira
Apply
$240k – $255k per year • In office • Full-Time • 5+ years exp • Bachelor's Degree • Everett
Python
Rust
C++
InfluxDB
AI/ML
Time Series Forecasting
DevOps
CI/CD
Docker
Grafana
Linux
Apply
$165k – $200k per year • In office • Full-Time • Everett
EtherCAT
Chips/EDA
KiCad
LTspice
Apply
$230k – $270k per year • In office • Full-Time • 10+ years exp • PhD • Everett
Python
MATLAB
Fortran
Machine Learning
DevOps
HPC
Apply
$210k – $250k per year • In office • Full-Time • 3+ years exp • PhD • Everett
Python
MATLAB
Fortran
Machine Learning
DevOps
HPC
Apply
$272k – $320k per year • In office • Full-Time • 10+ years exp • Bachelor's Degree • Everett
Apply
Apply
$165k – $200k per year • In office • Full-Time • 2+ years exp • Bachelor's Degree • Everett
Python
MATLAB
Simulink
Chips/EDA
LTspice
Apply
$235k – $270k per year • In office • Full-Time • 12+ years exp • Everett
Apply
$200k – $240k per year • In office • Full-Time • Everett
EtherCAT
Chips/EDA
KiCad
LTspice
Apply
$200k – $240k per year • In office • Full-Time • Everett
EtherCAT
Chips/EDA
KiCad
LTspice
Apply
Financials
Total raised
$500M
Latest round
Venture - Series Unknown
Funding rounds
1
Funding rounds
| Round | Announced | Amount | |
|---|---|---|---|
| Venture - Series Unknown | 2021 | $500M | Details |