Senior SDET - AI Detection and Response (AIDR) (Hybrid, Sunnyvale)

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 is seeking a Software Developer in Test (SDET) to join our AI Detection and Response (AIDR) team. In this role, you will own end-to-end quality for the next generation of AIDR services — a platform that processes millions of AI security events per second and manages petabytes of critical AI data. This is a hands-on, coding-intensive role on par with product development. You'll build and own AIDR-specific test tooling and frameworks, while leveraging and contributing to shared organization-wide testing infrastructure. Your work will span validation across both cloud-side backend services and UI applications, ensuring the system behaves correctly at every stage — from individual components to full system behavior. Testing concerns span functional, performance, contract, and chaos/resilience engineering.

This is an opportunity to work at unprecedented scale with cutting-edge cloud technologies while making a direct impact on organizations worldwide, protecting them from sophisticated AI-based threats.

PLEASE NOTE: This role is hybrid, requiring 2-3 days per week on-site at one of the posted locations.

Success Means:

Architect enterprise-grade test solutions that validate systems scaling seamlessly from thousands to millions of requests per second

Building reusable test frameworks and platform libraries that accelerate quality across multiple engineering teams

Drive operational excellence through rapid issue resolution, thorough root cause analysis, and proactive system improvements

Collaborating effectively across engineering teams to drive testing best practices and quality culture

Deliver with velocity while maintaining the highest standards of security and reliability

What You'll Do:

Own end-to-end validation of AIDR services across cloud-side backend and UI layers, spanning component, integration, and application levels, while continuously improving test and validation processes

Build and own AIDR-specific test tooling and frameworks, while leveraging and contributing to shared organization-wide testing tools and infrastructure

Define and drive testing strategies across functional, performance, contract, and chaos/resilience testing concerns

Verify features and functionality spanning our processing, data, and customer-facing application layers to ensure reliability, accuracy, and performance at scale

Participate in code and design reviews with a focus on quality, testability, security, and code hygiene

Review engineering technical design documents and requirements; provide guidance and strategy on how and where to build in testability

Contribute to service operations, including improving overall service observability and monitoring, root cause analysis of production issues, and implementing quality improvements to prevent future outages

Increase and improve automated test coverage across both backend services and UI applications

Mentor team members on testing methodologies, secure coding practices, and quality engineering

Leverage new open source solutions and AI-powered tools to build innovative testing approaches

What You'll Need:

8+ years of experience as an SDET or Backend/UI Developer (combined)

3+ years building testing frameworks and tooling for a Cloud SaaS product or similar SOA

Experience contributing to or defining testing strategy at a team or organizational level

Strong debugging skills: ability to spot design flaws, race conditions, and performance bottlenecks in complex distributed architectures

Strong computer science fundamentals (algorithms, data structures, distributed systems)

Expertise in at least one of: Golang, Python, Java — Go is our primary backend language, but strong engineers in any of these are welcome and we support ramp-up

Experience in a cloud distributed systems stack: e.g., Kubernetes, PostgreSQL, Redis, Kafka, and/or similar technologies — transferable skills in each category are a must

Experience with cloud services such as AWS, GCP, or OCI, particularly compute and storage offerings

Experience with CI/CD pipelines and integrating automated testing into deployment workflows

Experience developing and deploying in containerized environments (e.g., Docker, Kubernetes)

Extensive experience with testing tools and best practices (e.g., Jest, QUnit, Cypress, Playwright, JUnit, TestNG)

Experience testing REST and/or gRPC APIs and real-time or high-volume data systems

Proven experience utilizing AI technologies to enhance decision-making, streamline workflows and processes, improve efficiency, and drive business outcomes

Strong cross-group collaboration and interpersonal communication skills working across engineering organizations

Experience mentoring engineers and driving quality culture across a team or organization

Bonus Points:

Previous experience in cybersecurity companies or security-focused products

Deep understanding of AI/ML security challenges, threats, and mitigation strategies

Experience building, operating, validating, and scaling low-latency cloud services using gRPC and event-driven messaging systems such as Kafka or Pulsar

Experience with UI testing frameworks and front-end validation (Ember.js, React, or similar)

Experience with data visualization testing and accessibility validation

Experience with performance measurement, profiling, and optimization (both backend and frontend)

Experience with chaos engineering and resilience testing

Hands-on experience with Oracle Cloud Infrastructure (OCI), Google Cloud Platform (GCP), and/or Microsoft Azure

Experience leveraging AI and agentic tools to enhance testing workflows and automation

Contributions to open source libraries and/or frameworks

Familiarity with MS CoPilot Ecosystem and MS Agent Studio

#LI-JF1

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 equa