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Castle
Block bots & bad behavior
Last verified August 17, 2026 · Updated daily
Open roles at Castle
Nothing live right now. We re-check Castle daily and this page updates the moment they post.
Want their roles the day they go up, before the job boards index them?
Get started →Know when Castle is hiring before anyone else
A role stays uncontested for about four days. Here's the window — and where we put you in it.
From $9/month, cancel any time.
Watching Castle
0 applicantsRole spotted & verified
1You get the alert
1You've applied
~8Hits the job boards
250+Working at Castle
Founded in , Castle is Block bots & bad behavior. They're now <50 people. Working at a B2B, Security company at this stage means broad remit, direct access to founders, and equity that still means something if the company works out.
Most openings are based out of San Francisco, CA, USA; Remote.
How to actually get hired at Castle
Why applying the normal way doesn't work
Castle is <50 people. No recruiter, no HR. Your application goes to a founder juggling everything. Cold outreach is how you actually get seen.
Who to contact at Castle
Contact route not yet verified for Castle. For a <50-person B2B, Security company, expect a founder or department head to make the call — but this is a model, not confirmed data.
What Castle screens for
relevant experience and ability to operate autonomously
Customize your CV for the Castle role. Matching the job description language helps clear ATS filters.
Mistakes that kill Castle applications
Generic CVs stand out at a <50-person company — and not in a good way. Fastest path to rejection.
Don't open with what you want. Open with what Castle is dealing with right now — is growing, and what you'd do about it.
The wait-and-hope strategy fails. Follow up on day five — response rates roughly double.
Applying to Castle? Get the contact, not the form.
The Castle interview process
3 stages · 7 days typical · take-home: no · modelled from similar companies
We don't yet have verified candidate reports for Castle. What follows is the typical process for a <50-person B2B, Security company — treat it as a model, not confirmed detail.
Interview stages
Intro Call
Video call · 30 min
Culture fit and role expectations
Founder or hiring manager
Technical Deep Dive
Video call or in-person · 60 min
Past projects and problem-solving approach
Technical founder or lead
Final Round
In-person or video · 45 min
Team fit and offer discussion
Founding team
Castle interview timeline
Timeline: ~ days. That's faster than the B2B, Security median (10 days at <50 people).
Interviewed at Castle?
Tell us how it went — stages, questions, timeline. Takes 90 seconds and it's how this page stays accurate for the next person.
Submit your Castle interview experience →Castle jobs, frequently asked questions
Is Castle hiring right now?
We aren't tracking any live Castle vacancies today. We re-check daily and this page updates as soon as a role appears.
How do I apply for a job at Castle?
Use the apply links above, or check our guide to getting hired at Castle.
Does Castle respond to cold emails?
Response rate data for Castle not yet confirmed.
Who is the hiring manager at Castle?
At this size, hiring is usually run by a founder or department head.
What ATS does Castle use?
Castle uses Ashby.
How competitive is it to get hired at Castle?
Expect 50-100 applicants in the first two weeks for B2B, Security roles at this size. Apply within 72 hours for best odds.
How many rounds is the Castle interview?
3 stages: Intro Call, Technical Deep Dive, Final Round.
Is the Castle interview hard?
Focus on relevant experience and culture fit, not puzzles. Final Round is reportedly the most challenging round.
Does Castle give a take-home task?
No, Castle does not include a take-home stage.
How long does Castle take to get back to you?
Around 7 days across the full process.
What should I prepare for the Castle interview?
Focus on relevant experience and culture fit. At <50 people, they're testing whether you can operate without process, not whether you memorised algorithms.
Where is Castle based?
Castle is headquartered in San Francisco, CA, USA; Remote.
Get Castle roles before they're posted
A role stays uncontested for about four days. Here's the window — and where we put you in it.
From $9/month, cancel any time.
Watching Castle
0 applicantsRole spotted & verified
1You get the alert
1You've applied
~8Hits the job boards
250+