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Sr. Engineer, SDET - AI Detection and Response (AIDR) (Hybrid, Sunnyvale)

CrowdStrike

USA - Sunnyvale, CA, US$140k – $215khybrid

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About this role

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: You'll work closely with engineering teams to expand test coverage across unit, integration, contract, and end-to-end layers while modernizing our test infrastructure. This role combines deep technical expertise in test automation with strategic thinking about quality at scale. You'll be building the testing foundation that ensures reliability and performance as we deploy AI security controls across browser extensions, API gateways, cloud platforms, and agentic systems.

Success Means: • Contract Testing Excellence: Implement and scale contract testing across all services and API boundaries, reducing integration testing dependencies.

• Coverage Expansion: Work with service owners and independently to improve test coverage from current baseline - unit, integration, and E2E tests.

• Team Velocity: Onboard rapidly and contribute meaningfully within the first 60 days to an already fast-paced engineering environment.

• AI Quality Framework: Establish and/or contribute to efficacy testing of LLM models with measurable accuracy metrics. 

What You'll Do: • Design and implement contract testing framework to verify API contracts between various system components.

• Contribute comprehensive test strategies spanning unit, integration, contract testing layers

• Establish testing patterns and best practices for AI-powered detection capabilities and models efficacy

• Develop comprehensive E2E test scenarios covering multi-collector deployments and policy enforcement workflows.

• Implement quality telemetry through observability with detailed reporting. Create metrics dashboards, and alerting. Work with SRE and developers to create playbooks and support documentation.

What You'll Need: • 10+ years combined software development and test automation experience with a proven track record of establishing quality frameworks and delivering reliable, scalable test coverage for enterprise-grade cloud SaaS products at scale.

• Experience building testing frameworks and tooling for Cloud SaaS products

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

• Expertise at programming languages: Python, Go, Javascript

• Deep understanding of: Cloud architectures and microservices 

• Web Services: REST, gRPC, Protocol Buffers or similar API technologies 

• Data storage systems: PostgreSQL, Redis or similar databases 

• Container technologies: Docker, Kubernetes or similar orchestration platforms 

• Experience with CI/CD pipelines and testing in cloud environments (AWS/Azure/GCP) Strong debugging skills with ability to troubleshoot complex distributed systems 

• Experience with cloud performance testing and monitoring tools (e.g., JMeter, Gatling, New Relic, Datadog, Prometheus/Grafana)

Bonus Points: • Experience testing AI/ML systems, LLM applications, or prompt engineering security

• Performance testing experience with large-scale SaaS products handling high throughput, concurrent users, and distributed architectures

• Familiarity with ML development lifecycle, model training, evaluation, and deployment

• Hands-on experience with AI efficacy testing, adversarial testing, or red teaming

• Experience with browser extension testing frameworks 

• Background in API gateway testing (Kong, Envoy, LiteLLM, etc.) 

• Experience with Model Context Protocol (MCP) or agentic AI systems

• Experience scaling test infrastructure to support hundreds of engineers

#LI-MF1

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 (

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