Windborne Systems
windbornesystems.com
Actively hiring
Sensors & Transducers
Earth Observation
AI for Science
As featured in
View 7 jobs
Follow
Overview
News
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Total raised
$61.9M
8 rounds on record
Latest round
$37M
Venture round · Aug 2026 · 2 mo ago
Team
73
US Form 5500 (plan participants) · Dec 2025 · +52% in a year
Hiring now
19
+2 posted in 30 days
Grants
$3M
5 grants · CORDIS
Backers
3
Pear VC, Khosla Ventures
The money's age
Fresh money
2 months since the last round · and hiring
Momentum
49/100
hiring for its size, a new city, in the news, fresh money
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
Aug 18
First role in Uruguay Launch Contractor - Uruguay
Aug 5
Raised a round Venture round $37M · YahooFinance
Jul 27
First sales or marketing role GTM Lead
Jul 22
First executive search Chief of Staff to the CEO
2025
Team of 73 was 48 · US Form 5500 (plan participants)
Oct 21, 2025
On the Hacker News front page UA 1093 · 224 points
Aug 7, 2024
Won a grant $1.2M · CORDIS
Jul 15, 2024
Won a grant $231k · CORDIS
Dec 11, 2023
Won a grant $72k · CORDIS
May 12, 2023
Raised a round Venture round $9.9M · SEC Form D
Jun 16, 2020
Won a grant $1.4M · CORDIS
Dec 12, 2019
Won a grant $50k · CORDIS
2019
Founded
Tractionpublic signals, read monthly
Web presence
top 2%
of 133.2M domains by links, Common Crawl
Hacker News stories
3
best: 224 points
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Venture round | Aug 2026 | $37M | — | YahooFinance |
| Grant | Aug 2024 | $1.2M | — | CORDIS |
| Grant | Jul 2024 | $231k | — | CORDIS |
| Venture round | May 2024 | $15M | — | SEC Form D |
| Grant | Dec 2023 | $72k | — | CORDIS |
| Venture round | May 2023 | $9.9M | — | SEC Form D |
| Grant | Jun 2020 | $1.4M | — | CORDIS |
| Grant | Dec 2019 | $50k | — | CORDIS |
Registers and programsofficial lists and records that name the company
| Legal entity | WindBorne Systems Inc. | SEC Form D |
Founders and leadersfrom filings, registers and the company's site
Kai MarshlandDirectorSEC Form D
Andrey SushkoDirectorSEC Form D
John DeanDirectorSEC Form D
Backed byfrom the funds' portfolios and accelerator catalogs
Pear VC 
Khosla Ventures 
Ubiquity Ventures Investors in similar startupsfunds that back the companies most like this one
Similar startupsby what they do, their industry and backers
Sorcerer is building weather balloons that collect 1000x more data to power the worlds most accurate AI weather forecasts.
PhaseTree is a pioneering deep-tech startup from the Technical University of Denmark (DTU), founded in 2021 with a mission to revolutionize…
Easy to use, professional weather stations and soil sensors. Data visualisation, crop analytics and predictions aggregated in one platform.
Tomorrow.io is a weather and climate intelligence company that builds weather forecasting technology, including radar-based observation…
Sofar Ocean operates a global network of wave measuring smart buoys and ocean sensors. Its data improves weather forecasting and ship…
Bridgetown Research is a US-based software development company building a platform that offers AI-enabled research, data gathering…
How Windborne Systems hires
Truth index
A 87/100
Median time to fill
70 days
Ghost roles
0%
Stale roles
33%
Reposted roles
0%
Windborne Systems scores A on the Alion truth index (A is best, E worst), measured over 6 open roles re-checked against its own hiring board: 0% look like ghost listings, 33% have gone stale and 0% are the same role posted again. Its roles close in a median of 70 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
Founded in 2019, Windborne Systems is a deep-tech company that designs and operates smart weather balloons to revolutionize long-range atmospheric sensing and weather forecasting. Using long-duration, real-time tracking, these lightweight sounding balloons collect critical data from unmonitored atmospheric regions to significantly improve weather prediction models. By pairing ultra-dense data gathering with AI algorithms, the firm provides high-precision forecasting tools to combat climate volatility and support aviation, agriculture, and government agencies.
News
WindBorne Systems Raises $37 Million to Build the World
REDWOOD CITY, CA, August 05, 2026--WindBorne Systems, the weather intelligence company building the world
Read more
Report
WindBorne Systems Raises $37 Million to Build the World's Weather Intelligence Infrastructure - AOL
Read more
Report
Report
American Weather Enterprise Association Announces Founding Members
Washington, D.C. - Feb. 25, 2026 - The American Weather Enterprise Association (AWEA) today announced its first member organizations, marking a major step toward building a unified voice for the Weather Enterprise-the vast network of government, private s
Read more
Report
Report
With fewer weather balloons due to government staffing cuts, forecasts may be less accurate
Some weather balloon launches have been suspended because of the Trump administration's cuts to the National Weather Service. That may hurt forecast accuracy.
Read more
Report
The most innovative companies in sustainability for 2025
Why Infinium, Zum, and Copper are among Fast Company's Most Innovative Companies in the sustainability space for 2025.
Read more
Report
Mini weather balloons and AI give fresh weather data to African farmers
A pilot project in Kenya is using technology from a US start-up to provide early warnings of extreme events
Read more
Report
WindBorne Systems
Research outputs, collaborations and relationships for WindBorne Systems
Read more
Report
Andrey Sushko, 25; Kai Marshland, 22; Paige Brown, 21; & John Dean, 22 - 2019-12-03 - 2020 30 under 30: Science
Cofounders, Windborne SystemsDean, Marshland, Sushko and Brown aim to improve a decades-old technology: weather balloons. Their company, Windborne Systems, builds weather balloons that are more durable and can fly longer than conventional balloons. They c
Read more
Report
Show more news
Tech stack
Technologies named in job postings at Windborne Systems over the last 12 months, by layer, with the share of postings for each.
Technologies in use
22
Postings analysed
13
Stack modernity
79/100AI adopter
Languages
Python62%
C++31%
Ruby15%
Fortran8%
Frameworks & libraries
PyTorch46%
NumPy15%
Ruby on Rails15%
Databases
PostgreSQL15%
Cloud & platforms
RTOS15%
AWS8%
Azure8%
AI & ML
LLM15%
Sign in to see how your skills match this stack
Sign In
Full Windborne Systems tech stack
22 technologies · by team · pay by technology · changes · similar stacks
Salary insights
Compensation ranges based on this company's open jobs
Median
$150k
Typical range
$56k – $240k
Open positions
16
6
Jobs
Intern
16.7%
Junior
16.7%
Senior
50%
Staff
16.7%
| Level | Jobs | Median | Typical range |
|---|---|---|---|
| Intern | 1 | $66k | $66k |
| Junior | 1 | $150k | $150k |
| Senior | 3 | $150k | $110k – $200k |
| Staff | 1 | $150k | $150k |
Highest paying role
Machine Learning Infrastructure Engineer
$240k
Normalized to USD per year
All salaries at Windborne Systems
By role, level and city, against the market · 16 jobs with pay
People
Kai Marshland
Director
Andrey Sushko
Director
John Dean
Director
Nikhil Trivedi
Director
Names and roles come from public filings, company registers and the company's own site. Is this you? Correct or remove · How we handle this data
Growth
Hiring Momentum
69/100
Growing
Open positions
19
2 opened / 7 closed in 30 days
Median time-to-fill
60 days
faster than 23% 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.
Field & Service
29% ▲
Industrial Engineering
21% ▲
AI/ML
14%
Hardware
7% ▼
Sales
7% ▼
Operations
7% ▼
Activity Timeline
Added RAG to stack
Oct 2026
Added Fine-tuning to stack
Oct 2026
New location: Central
Sep 2026
New location: Palo Alto
Sep 2026
New location: Bay Minette
Sep 2026
New location: Washington
Sep 2026
Added Linux to stack
Sep 2026
Added Machine Learning to stack
Sep 2026
New location: Artigas
Sep 2026
New location: Corpus Christi
Sep 2026
Added SolidWorks to stack
Sep 2026
Added SQL to stack
Sep 2026
Offices
Where the company hires and what each office is for
Cities
4
Hiring now
4
Countries
2
Busiest office
Palo Alto
Loading the map
Headquarters
Builds here
Office with open vacancies
Tap a pin for the office
Palo Alto
United States
HQ
14 open roles 6 posted in 90 days 36% engineering 50-200 est. staff $159k Avg Salary
hires for Industrial Engineering, AI/ML, Backend
Artigas
Uruguay
1 open roles 1 posted in 90 days 1-10 est. staff
hires for Industrial Engineering
Bay Minette
United States
1 open roles 1 posted in 90 days 1-10 est. staff $56k Avg Salary
hires for Field & Service
Central
United States
1 open roles 1 posted in 90 days 1-10 est. staff $110k Avg Salary
hires for Industrial Engineering
Earlier presence
Redwood City, United States
Corpus Christi, United States
Washington, United States
Jobs
$120k – $200k per year • Equity • In office • Full-Time • Palo Alto
Fine-tuning
AI Agents
PyTorch
LLM
RAG
Machine Learning
Apply
≈ $94k – $275k per year (Estimated) • In office • Internship • Bachelor's Degree • Palo Alto
C++
Apply
≈ $165k – $334k per year (Estimated) • Equity • In office • Full-Time • 5+ years exp • Palo Alto
Python
Rust
Ruby
Ruby on Rails
Databases
PostgreSQL
DevOps
Azure
AWS
Cybersecurity
NIST 800-53
FedRAMP
Apply
$140k – $240k per year • Equity • In office • Full-Time • Palo Alto
PyTorch
DevOps
Docker
Apply
$110k – $150k per year • In office • Full-Time • Palo Alto
Apply
$130k – $180k per year • Equity • In office • Full-Time • Palo Alto
Ruby
Ruby on Rails
Databases
PostgreSQL
Apply
Apply
Financials
Total raised
$64.9M
Latest round
Venture - Series Unknown
Funding rounds
8