Careers
Deliver security software that feels clear when the stakes are high.
Cosantoir delivers one security surface across device protection, browsing defense, identity recovery, privacy tooling, and business operations. The work is multidisciplinary and the standard is high.
PlatformClient AppsProtection SystemsDesignOperations
How we work
Product judgment matters
We care about engineers, designers, and operators who can reduce complexity instead of adding another layer of tooling around it.
Security without theater
The work spans real abuse paths, incident response, platform hardening, identity protection, and systems that people depend on every day.
Operational rigor
Good ideas are not enough. We value clear writing, sound interfaces, measurable behavior, and systems that stay understandable under pressure.
Where we need strength
Platform and infrastructure
Core services, auth, billing, telemetry, release workflows, and the foundations that keep the product dependable.
Client product engineering
Web, desktop, mobile, and extension experiences that make security controls feel usable rather than intimidating.
Protection systems
Detection, browsing defense, device protection, identity signals, recovery workflows, and operational security surfaces.
Design and product systems
Interaction design, information architecture, and product shaping for software that needs to feel calm, fast, and trustworthy.
What good looks like
- Show work you have actually delivered, not just concepts.
- Explain the tradeoffs you made and the constraints you operated under.
- Write clearly enough that other people can run with your thinking.
- Care about reliability, not just implementation speed.
How to reach us
Hiring now routes directly through the official company domain. Send candidate material to the mailbox that best matches the conversation so it lands with the right team immediately.
- A short note on why you want to work on Cosantoir.
- Links to delivered products, code, writing, or case studies.
- The systems or product areas where you have taken real ownership.