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Sr. SDET - Cloud, Detection Engineer (Hybrid, London)

CrowdStrike · United Kingdom - London

Spotted 48d agoFull-time

Job details

Work mode
Hybrid
Employment
Full-time
Level
Senior
Experience
10+ years
Posted
Sep 10, 2026
Last confirmed open
Oct 28, 2026

What you'll need to apply

Fields this application requires

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Company-specific questions

  • Conflict of Interest If hired, do you expect that you will engage in any outside employment, consulting, freelance or advisory work, board service, trade or industry group, teaching role, personally owned business, financial interest, or other outside professional or business activity that could reasonably conflict with CrowdStrike’s business or interfere with the responsibilities of the position for which you are applying (excluding non-competing personal hobbies, passive investments, or uncompensated civic activities that do not impact your work)? This may include an activity or interest that overlaps with your role or expected duties at CrowdStrike; overlaps with CrowdStrike’s business or offerings; creates a significant competing time or loyalty commitment; or could involve CrowdStrike confidential information, resources, or business opportunities. You do not need to disclose an activity that will end before your start date and will leave no continuing interest, obligation, or restriction relevant to cybersecurity or your work at CrowdStrike. A “Yes” response will not automatically disqualify you from consideration. It will allow CrowdStrike to determine whether a potential conflict exists and, if so, whether it can be avoided or appropriately managed. This question applies only to the extent permitted by applicable law.
  • Acknowledgment As an AI-native company, CrowdStrike embraces the thoughtful use of AI tools in our work. During our interview process, some assessments may expressly permit the use of AI and other tools — we will make this clear upfront when that is the case. I acknowledge that unless explicitly told otherwise by my interviewer(s), I will complete all interviews and assessments through my own independent work, without assistance from generative AI, automated tools, or other external resources. Where AI use is permitted, I understand that my interviewer(s) will specify which tools are authorized and how they may be used. I understand that using unauthorized tools or resources during any stage of the interview process may result in my disqualification from consideration.
Job description

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

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 for which we’re responsible.

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. The Falcon endpoint agent is able to react in near-real-time to changes in the threat landscape, and underpinning this is the ability of the endpoint agent to quickly query our cloud for new information.

This system operates within tight latency and response time constraints at a scale matched by few other environments, and the scale is only growing. CrowdStrike is seeking a Software Developer in Test for our Cloud Detections Platform team, which is tasked with building CrowdStrike’s next generation detection platform.

In this capacity, you will be in charge of developing and operating the team's CI/CD pipeline, making sure our solutions work, and raising the alarm when they suddenly don’t. You’ll be building out an end-to-end validation pipeline, largely from scratch, leveraging existing frameworks and tooling where possible, but able to color outside the lines when necessary.

You’ll work in an environment where quality is the company culture. Come use cutting edge tools and technologies as well as tried and true ones.

Work on: verifying key features and functionality that spans our processing, data and customer facing application layers to ensure it’s able to support low-latency prevention of malware, manage tens of thousands of events per second, query across terabytes of data and support the team in delivering quality code, tested to perfection.

What You'll Do

  • Both build stuff and break stuff!
  • Verify component, system integration and application level features and functionality to ensure our reliability, accuracy and performance reaches our standards for quality.
  • Participate in code and design reviews and provide technical guidance and feedback to team members.
  • Review engineering technical design documents and requirements. Provide guidance and strategy about how and where to build in testability.
  • Engage in continuous improvement of our end-to-end test and validation processes.
  • Increase and improve our automated test coverage, and contribute to existing tools, frameworks and related solutions.
  • Leverage new open source solutions to build new tools that test things in new ways.
  • Improve our delivered product quality across our entire platform and applications.
  • Collaborate on determining root causes of production outages and adding quality improvements to prevent outages in the future.
  • Crowdstrike is a remote-friendly company, but we do get together from time to time. Some travel will be required for in-person meetings.
  • Build and manage CI/CD pipelines using Jenkins, Github actions or similar tools.

What You'll Need:

  • 10 + years of experience as an SDET or Backend Developer (combined)
  • 4-5 + years building testing frameworks and tooling for a Cloud SaaS product
  • Strong debugging skills: ability to spot design flaws, race conditions and performance bottlenecks in complex architectures.
  • A computer science background or equivalent experience (programming styles, data structures, algorithms, etc.)
  • Experience in building, validating, and/or maintaining large distributed systems at scale.
  • Solid design and problem-solving skills with a demonstrated passion for engineering excellence, quality, security, and performance, coupled with a desire to ship elegant solutions to complex problems.
  • Strong cross-group collaboration and interpersonal communication skills working across engineering organizations.
  • Experience with Golang, Python, Kubernetes, Cassandra, Redis, Kafka, Elastic Search, Python, and/or similar technologies. You don’t need all of these, but you need at least one.
  • Both a sense of humor and a sense of humility.

Bonus Points:

  • Prior experience with building, operating, validating, and scaling low-latency internet services.
  • Experience with building and shipping cloud-connected endpoint software.
  • Solid grounding in the technology of at least one cloud environment (AWS, Azure, GCP).
  • Exposure to/experience with cybersecurity and intelligence.

#LI-YA1

#LI-SN2

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 [email protected] for further assistance.

Interested in this role?Continue on CrowdStrike's careers page.
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