Sr. Software Engineer, Sensor - Anti-Tampering/SSP (Hybrid)

As a global leader in cybersecurity, CrowdStrike protects the people, processes and technologies that drive modern organizations. Since 2011, our mission hasn’t changed — we’re here to stop breaches, and we’ve redefined modern security with the world’s most advanced AI-native platform. We work on large scale distributed systems, processing almost 3 trillion events per day and this traffic is growing daily. Our customers span all industries, and they count on CrowdStrike to keep their businesses running, their communities safe and their lives moving forward. We're proud to work for a mission-driven company leveraging AI to transform the way we work. CrowdStrikers drive their careers through flexibility and autonomy while also being expected to contribute to a culture of responsible AI adoption, experimentation, and innovation. We use an AI-first mindset as a force multiplier to proactively and continuously accelerate execution, build expertise, uncover insights, and solve complex problems. We’re always looking to add talented CrowdStrikers to the team who have limitless passion, a relentless focus on innovation and a fanatical commitment to our customers, our community and each other. Ready to join a mission that matters? The future of cybersecurity starts with you.

About the Role:
CrowdStrike's Sensor Security Platform (SSP) team is building up a dedicated Sensor Anti-Tampering engineering team to protect the Falcon sensor against adversary subversion. The Falcon sensor runs on millions of endpoints — and is a high-value target for sophisticated threat actors who seek to disable, evade, or degrade endpoint protection as a precursor to their attacks.

This role exists at the intersection of offense and defense: you will think like an adversary to protect one of the world's most widely deployed security agents. You will design and implement tamper-resistance, tamper-detection, and tamper-response capabilities that ensure the Falcon sensor remains operational and trustworthy — even when an attacker has elevated privileges on the endpoint.

The Anti-Tampering domain spans all major OS platforms: Windows, macOS, Linux. While no single engineer is expected to be expert across all platforms, you will bring deep OS and systems expertise on at least one, and develop cross-platform perspective as part of the team.

What You'll Do:

• Design, implement and own sensor anti-tampering capabilities — including tamper prevention, tamper detection, and tamper response mechanisms

• Collaborate with CrowdStrike's adversary intelligence, red team, and product security groups to stay ahead of emerging anti-EDR tradecraft

• Partner with our threat analysts to understand adversary techniques targeting EDR agents (e.g. unhooking, driver manipulation, process termination, credential abuse, policy subversion) and develop mitigations against them

• Reason about and enumerate the sensor's attack surface on your platform(s) of expertise, identifying gaps in tamper-resistance coverage

• Contribute to cross-platform anti-tampering architecture — ensuring consistency of guarantees while respecting platform-specific realities

• Write code in C/C++ and in CrowdStrike's internal domain-specific languages (you will be trained in the DSL; it is event-driven, asynchronous, and used extensively in the sensor's detection and response logic)

• Write unit, functional and integration tests — including adversarial test cases that simulate tamper attempts

• Participate in security design reviews for new sensor features, advising on tamper-resistance implications

• Diagnose and respond to production escalations related to sensor tampering — including ProdSec and customer-reported issues

What You'll Need:

• Deep systems programming expertise on at least one major platform (Windows, macOS, or Linux) — particularly in areas relevant to security agent protection: kernel interfaces, driver frameworks, process/memory protection, system service architecture

• Ability to reason adversarially: understand how an attacker with local admin or root privileges would attempt to disable or evade a security agent, and design defenses accordingly

• Strong C/C++ skills and comfort working in large, complex codebases

• Ability to design and implement solutions that are both security-hardened and production-safe (anti-tampering must not compromise system stability)

• Ability to reason about, describe, and communicate the security properties and assumptions of complex systems

• Experience shipping security-critical software where correctness and reliability are non-negotiable

• Ability to work effectively in a distributed, cross-timezone team with complex subject matter expertise