The Castle blog
castle.io
As featured in
View 2 jobs
Follow
Overview
News
Technologies
Salaries
Products
People
Growth
Jobs
Financials
Overview
Skip to content About us We're building trust infrastructure for the modern internet Join our team Castle provides developer-grade infrastructure to stop bots, abuse, and fraud. We turn user behavior into real-time signals that power security for companies like Canva, Rockstar Games, and Atlassian.
News
Fingerprint harvesting in the bot ecosystem
This report uncovers how bot ecosystems harvest and reuse real browser fingerprints, including signals from commercial anti-bot systems, to scale realistic impersonation. These fingerprints are becoming operational assets, enabling more efficient and hard
Read more
Report
BotmasterLabs: Powering an Era of Spam
How XRumer and XEvil scaled forum spam by combining automation, CAPTCHA solving, and brittle fingerprinting.
Read more
Report
Inside a bot operator's email verification infrastructure
During an investigation into a large-scale automated account creation attack targeting one of our customers, we observed a burst of suspicious registration activity.In less than a week, the attackers attempted more than 80,000 registrations.While investig
Read more
Report
Account enumeration in the wild: analyzing a real-world Spotify enumeration tool
In this blog post, we study the Spotify-Account-Checker open source project. The author describes it as:
Read more
Report
You see an email ending in .eu.org. Must be legit, right?
At first glance, an email address ending in .eu.org looks trustworthy. It feels institutional, maybe even official. Many people implicitly associate it with Europe, nonprofits, or established organizations.That assumption is wrong more often than you migh
Read more
Report
Pro access
Upgrade to see all 30 mentions
Upgrade to a paid plan to read every media mention of this company - funding news, awards, product launches and press releases from all the outlets writing about it.
Every media mention and press release
Funding news, awards and product launches
Fresh coverage from every outlet writing about the company
Upgrade now
Cancel anytime. Secure checkout. Instant activation.
Technologies
Tech DNA
Python
JavaScript
Node JS
Django
React.js
Frontend
JavaScript
Node JS
TypeScript
CI/CD
React.js
Other
Python
Rest API
Django
Stack modernity
85/100
How modern this stack is, based on technology relevance, AI adoption and the share of legacy tools.
In-demand technologies
Python
2 jobs
Required
$145k
-19% vs market
Rest API
1 job
Required
$145k
+51% vs market
CI/CD
1 job
Required
$145k
-9% vs market
Django
1 job
Required
$145k
Median
JavaScript
1 job
Required
$145k
-9% vs market
TypeScript
1 job
Required
$145k
-19% vs market
Node JS
1 job
Required
$145k
-17% vs market
React.js
1 job
Required
$145k
-19% vs market
Salary medians are calculated from this company's open jobs and compared with the market.
Industry adoption
Python
10%
CI/CD
8%
JavaScript
7%
TypeScript
5%
Node JS
4%
React.js
3%
Share of companies in the same industry that use each technology.
Stack changes
TypeScript
Aug 2026
React.js
Aug 2026
Node JS
Aug 2026
JavaScript
Aug 2026
Rest API
Aug 2026
Python
Aug 2026
Django
Aug 2026
CI/CD
Aug 2026
Technologies recently added to or removed from this company's stack - a signal of tech migrations and new initiatives.
OnHires
Cube
Blackstone Eit
Binance
Sber
Greenatom
Growth
Hiring Momentum
58/100
Growing
Open positions
2
0 opened / 0 closed in 30 days
ATS activity
Every ~3 days
08/30/2026
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.
Backend
100% ▼
Activity Timeline
Added TypeScript to stack
Aug 2026
Added React.js to stack
Aug 2026
Added Node JS to stack
Aug 2026
Added JavaScript to stack
Aug 2026
Added Rest API to stack
Aug 2026
Added Python to stack
Aug 2026
Added Django to stack
Aug 2026
Added CI/CD to stack
Aug 2026
Jobs
$98k – $145k per year • Remote/Hybrid • Full-Time • Bachelor's Degree • New York
Python
Django
DevOps
CI/CD
Rest API
Apply
$98k – $145k per year • Remote/Hybrid • Full-Time • Bachelor's Degree • New York
JavaScript
Node JS
Python
TypeScript
React.js
Apply