Senior Endpoint Security Engineer - Kernel & OS

Mimecast North America, Inc.; Minneapolis (MN); On-site; USD 148,000 - 222,000; Full time

Job summary

Mimecast North America, Inc. is seeking a Senior Software Engineer to advance the Endpoint Sensor team.

You will design, implement, and own cross‑platform endpoint capabilities, working at the OS boundary with kernel‑mode components and extensions to defend data across Windows, macOS, and Linux. You’ll contribute to real-time enforcement while maintaining performance and reliability in large-scale deployments, collaborating with product and cloud teams to secure AI-driven workflows and

Qualifications

• Experience building production software on Windows/macOS/Linux endpoints.
• Low-level endpoint development on kernel mode or Endpoint Security frameworks.
• Strong C++ fundamentals and memory/concurrency optimization.
• Experience shipping enterprise endpoint software.
• Ability to design extensible architectures with stable interfaces.

Responsibilities

• Design and develop core endpoint capabilities across Windows, macOS, Linux.
• Build kernel-mode components and extensions with high performance.
• Implement real-time inline enforcement with minimal impact on performance.
• Own features end to end from research to production.
• Collaborate with product and cloud teams to enable security investigations.
• Maintain observability and reliability of always-on endpoint software.

Skills

Low-level development

C++

Kernel-mode development

Cross-platform

Rust familiarity

Security-minded design

End-to-end ownership

Tools

Rust

Job description

Mimecast North America, Inc. is seeking a Senior Software Engineer to advance the Endpoint Sensor team.

You will design, implement, and own cross‑platform endpoint capabilities, working at the OS boundary with kernel‑mode components and extensions to defend data across Windows, macOS, and Linux. You’ll contribute to real-time enforcement while maintaining performance and reliability in large-scale deployments, collaborating with product and cloud teams to secure AI-driven workflows and