Senior - Principal Systems Engineer, Bots + Fraud Detection (US East Coast)

This role would suit someone moving from a senior-level hands-on distributed systems role, cyber security / fraud experience preferred. You must be willing to work East Coast hours and be onsite two days per week at one of the office locations listed below. This is not a fully remote role.
Available Locations: NYC, Washington DC, Austin Texas - considered if working East Coast hours.
About the department
Cloudflare's Engineering Team is home to some of the industry's highest-performing engineers, dedicated to building and scaling innovative software that handles a large proportion of the Internet. All of our systems run at a scale you're unlikely to find elsewhere in the industry (80m+ requests / second) and very low latency (single figure microseconds at most) so we can offer really unique challenges and opportunities for growth in this very interesting and fast-growing area.
Our teams responsible for Bots and Fraud Detection develop solutions to identify and mitigate malicious bot activities, ensuring the security and integrity of our customers' applications. We collaborate with product and other engineering teams to implement fraud detection mechanisms and our work includes deploying cutting-edge machine learning techniques.
We're very good at sharing knowledge and helping each other grow and have a real impact on the wellbeing of the internet!
What you'll do
Join Cloudflare's Device Fingerprinting team to tackle real-world security challenges relating to identifying abusive HTTP L7 traffic coming from people and automated bots. We capture a huge amount of metadata from traffic passing through our proxy and also from scripts running on client devices. There are fascinating data science and engineering scale problems to solve in working out which client devices are behind incoming requests in a privacy-first way, including training and deploying machine learning models.
Our tech stack includes Go, Rust, Python, JavaScript, Kafka, Kubernetes, ClickHouse, PostgreSQL, and Jupyter notebooks.
What are we looking for?

• An expert in designing, integrating, and optimizing distributed data processing pipelines
• Very strong hands-on coding skills in Go, Rust, Python, or other high-performance languages
• Curiosity, empathy and strong emotional intelligence
• Someone comfortable tackling ambiguous problems
• Experience in constructing and managing alerting and monitoring systems for data processing pipelines
• Exceptional abilities in systems-level debugging
• Familiarity with advanced analytics encompassing machine learning, statistical inference, and AI
• Preferred background or interest in Web Security and HTTP protocols

Bonus Points

• Knowledge and experience with columnar databases like ClickHouse
• Experience productionizing ML models
• Experience with cluster and configuration management systems such as Docker, Salt
• Strong web security fundamentals
• Previous experience in bot and fraud detection

Compensation
Compensation may be adjusted depending on work location.

• For New York City & Washington DC based hires: Estimated annual salary of $154,000 - $229,000 (multiple levels included in range)

Equity
This role is eligible to participate in Cloudflare's equity plan.
Benefits
Cloudflare offers a complete package of benefits and programs to support you and your family. Our benefits programs can help you pay health care expenses, support caregiving, build capital for the future and make life a little easier and fun! The below is a description of our benefits for employees in the United States, and benefits may vary for employees based outside the U.S.
Health & Welfare Benefits

• Medical/Rx Insurance
• Dental Insurance
• Vision Insurance
• Flexible Spending Accounts
• Commuter Spending Accounts
• Fertility & Family Forming Benefits
• On-demand mental health support and Employee Assistance Program
• Global Travel Medical Insurance

Financial Benefits

• Short and Long Term Disability Insurance
• Life & Accident Insurance
• 401(k) Retirement Savings Plan
• Employee Stock Participation Plan

Time Off

• Flexible paid time off covering vacation and sick leave
• Leave programs, including parental, pregnancy health, medical, and bereavement leave