Sr. Software Engineer II, Sensor - Sensor Event Runtime (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 also a mission-driven company. We cultivate a culture that gives every CrowdStriker both the flexibility and autonomy to own their careers. 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: We're building a welcoming & flexible team that prizes collaboration over competition, one which provides opportunities to learn new skills, mentor junior and senior developers and contribute to the direction of both the team & the products we're responsible for. This is a high trust environment where we allow team members to manage their own time, take holidays as they need it and reward them with competitive salaries and equity. CrowdStrike is seeking a Senior Software Engineer II to join our Sensor Event Runtime (SER) team. This role is responsible for the design and implementation of high-performance software components in CrowdStrike's endpoint security solution — handling storage, correlation, filtering, rate limiting, and deduplication for event processing systems to ensure our customers are secure. You'll be designing and troubleshooting low-latency C and C++ code across Windows, Mac, and Linux, and your expertise in kernel mode development, concurrency primitives, and resource acquisition patterns will directly drive the performance of our event pipelines. Location: This is a hybrid role based out of either our office in Sunnyvale, CA, Austin, TX or Redmond, WA with an expectation of being in the office twice a week. What You'll Do: Design, develop, and test high-performance, cross-platform C and C++ code for Windows, Mac, and Linux. Collaborate with cross-functional teams to integrate new features into the Falcon sensor. Troubleshoot complex issues related to kernel mode development and low-latency systems. Develop solutions that emphasize thread safety, resource efficiency, and low-latency performance. Be an energetic self-starter with the ability to take ownership and be accountable for deliverables, both individually and when leading a team. Deliver and accept feedback with grace and courtesy. Focus on continual learning, raising the bar for both yourself and your teammates. CrowdStrike is a computer security company, but we do not require candidates for this role to have prior security industry experience. We will mentor and train in security topics as needed. We do expect a strong interest in CrowdStrike's mission and a willingness to engage with the needs of our product teams and customers. What You'll Need: Proven track record of successfully delivering complex software projects. Advanced C/C++ proficiency, including design patterns. Kernel Mode Development: Demonstrated experience with kernel mode development on at least one platform (e.g., Windows, Linux). Cross-Platform Development: Proficiency developing sophisticated software across multiple operating systems (Windows, Mac, Linux), with expertise utilizing cross-platform libraries and build systems. Process Management & IPC: In-depth understanding of process creation, synchronization, and communication mechanisms. Concurrency Primitives & Resource Acquisition: Expertise in developing concurrent code using synchronization primitives and extensive experience with resource acquisition patterns (e.g., RAII, lock-free data structures). Memory Management & Performance Optimization: Comprehensive knowledge of memory management techniques (paging, virtualization, etc.) and extensive experience with performance optimization techniques (profiling, caching, etc.). A strong sense of ownership — your team owns the code and the future of these components. Bonus Points: Windows Kernel Experience: Deep experience developing kernel-mode drivers or system software, with a comprehensive understanding of Windows kernel internals and API usage. High-Throughput Event Pipelines: Experience designing and implementing high-throughput event processing systems. Python Scripting & Testing: Proficiency with Python and its ecosystem, including experience with testing frameworks such as Pytest. #LI-CW1 #LI-OC1 #HTF Benefits of Working at CrowdStrike: Market leader in compensation and equity awards Comprehensive physical and mental wellness programs Competitive vacation and holidays for recharge Paid parental and adoption leaves Professional development opportunities for all employees regardless of level or role Employee Networks, geographic neighborhood groups, and volunteer opportunities to build connections Vibrant office culture with world class amenities Great Place to Work Certified™ across the globe CrowdStrike is proud to be an equal opportunity employer. We are committed to fostering a culture of belonging where everyone is valued for who they are and empowered to succeed. We support veterans and individuals with disabilities through our affirmative action program. CrowdStrike is committed to providing equal employment opportunity for all employees and applicants for employment. The Company does not discriminate in employment opportunities or practices on the basis of race, color, creed, ethnicity, religion, sex (including pregnancy or pregnancy-related medical conditions), sexual orientation, gender identity, marital or family status, veteran status, age, national origin, ancestry, physical disability (including HIV and AIDS), mental disability, medical condition, genetic information, membership or activity in a local human rights commission, status with regard to public assistance, or any other characteristic protected by law. We base all employment decisions--including recruitment, selection, training, compensation, benefits, discipline, promotions, transfers, lay-offs, return from lay-off, terminations and social/recreational programs--on valid job requirements. If you need assistance accessing or reviewing the information on this website or need help submitting an application for employment or requesting an accommodation, please contact us at View email address on click.appcast.io for further assistance. Find out more about your rights as an applicant. CrowdStrike participates in the E-Verify program. Notice of E-Verify Participation Right to Work CrowdStrike, Inc. is committed to fair and equitable compensation practices. Placement within the pay range is dependent on a variety of factors including, but not limited to, relevant work experience, skills, certifications, job level, supervisory status, and location. The base salary range for this position for all U.S. candidates is $160,000 - $250,000 per year, with eligibility for bonuses, equity grants and a comprehensive benefits package that includes health insurance, 401k and paid time off. For detailed information about the U.S. benefits package, please click here. CrowdStrike was founded in 2011 to fix a fundamental problem: The sophisticated attacks that were forcing the world’s leading businesses into the headlines could not be solved with existing malware-based defenses. Founder George Kurtz realized that a brand new approach was needed — one that combines the most advanced endpoint protection with expert intelligence to pinpoint the adversaries perpetrating the attacks, not just the malware. There’s much more to the story of how Falcon has redefined endpoint protection but there’s only one thing to remember about CrowdStrike: We stop breaches.