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

Cloudflare•San Francisco, CA

2d•Hybrid

About The Position

At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company. We realize people do not fit into neat boxes. We are looking for curious and empathetic individuals who are committed to developing themselves and learning new skills, and we are ready to help you do that. We cannot complete our mission without building a diverse and inclusive team. We hire the best people based on an evaluation of their potential and support them throughout their time at Cloudflare. Come join us! 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.

Requirements

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

Nice To Haves

Preferred background or interest in Web Security and HTTP protocols
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

Responsibilities

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.

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