Senior Software Engineer, Internal Fraud Platform

At Cloudflare we are on a mission to help build a better Internet. Today the company runs one of the worlds 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 Magazines Top Company Cultures list and ranked among the Worlds Most Innovative Companies by Fast Company.

At Cloudflare were not looking for people who wait for a polished roadmap; were looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a normalized problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration leveraging AI to ship faster today to make it better tomorrow while ensuring that every improvement no matter how small is shared across the team to lift everyone up. If youre the type of person who values curiosity over bureaucracy and that AI is a partner in solving tough problems to keep the Internet moving forward youll fit right in.

Cloudflares Internal Fraud Platform team is focused on protecting Cloudflare from fraud and abuse: fraudulent signups promo and trial abuse payment fraud chargebacks and account takeover that cost the company revenue and support overhead. Today the team is built around data science developing the signals and models that detect this activity. Were hiring our first software engineer to build the platform around that work: ingesting events from the internal systems where fraud shows up (billing signup support) evaluating and routing them and getting decisions and case data in front of the people who act on them.

As the founding engineer on this team youll be the connective tissue between Cloudflares internal systems and our fraud detection capabilities. Youll instrument the systems that generate fraud signals build the pipelines and services that deliver those signals for evaluation and create the tools our analysts use to investigate and resolve cases. Youll partner closely with data scientists to take models and heuristics from notebook to production and have meaningful influence over the architecture tooling and engineering practices its built on.

• Build the Platform: Design build and operate the services and pipelines that ingest fraud-relevant events from internal systems (billing signup support and others) evaluate them and route decisions and case data to the right destinations.

• Deliver Signals for Scoring: Partner with the teams Data Scientists and Machine Learning Engineer to expose the event data and contextual features their models need and integrate model decisions back into the pipelines and tools that act on them.

• Build Investigation Tooling: Create the internal tools and workflows that let Trust & Safety Support and Finance analysts investigate flagged accounts and events and take action.

• Own Projects End to End: Drive initiatives from problem definition through design implementation rollout and operation with minimal many ways this is a 0-to-1 team and youll be expected to fill in the gaps.

• Ensure Accuracy and Reliability: Build fault-tolerant systems that handle retries failures and high event volumes without silently dropping or duplicating fraud signals and maintain the operational health of what you ship including addressing the root cause of recurring issues.

• Shape Technical Direction: As one of the teams first engineers help establish the architecture patterns tooling choices and engineering standards that will scale as the team grows.

• Collaborate Cross-Functionally: Work with Trust & Safety Data Science Billing/Fintech Support and Product teams to understand fraud vectors and turn them into engineering requirements.

• Five or more years of professional software engineering experience or equivalent practical experience.

• Experience building and operating distributed systems or backend services in production.

• Experience designing and building data or event pipelines (e.g. Kafka Pub/Sub or similar).

• Strong understanding of RESTful APIs service security and API standards such as OpenAPI OAuth or JWT.

• Working knowledge of SQL data modeling and relational databases such as PostgreSQL or MySQL.

• Comfort owning ambiguous 0-to-1 problems with limited existing infrastructure or precedent.

• Strong troubleshooting cross-functional communication and project ownership skills.

• Experience in fraud risk trust & safety or payments engineering.

• Familiarity with ML serving and feature engineering concepts

• Experience with billing subscriptions or other financial/transactional systems.

• Experience building internal tools or dashboards for non-engineering stakeholders (analysts support finance).

Compensation may be adjusted depending on work location.

This role is eligible to participate in Cloudflares equity plan.

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

Were not just a highly ambitious large-scale technology company. Were a highly ambitious large-scale technology company with a soul. Fundamental to our mission to help build a better Internet is protecting the free and open Internet.

Project Galileo: Since 2014 weve equipped more than 2400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks that would otherwise censor their work technology already used by Cloudflares enterprise customers--at no cost.

Athenian Project: In 2017 we created the Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free so that their constituents have access to election information and voter registration. Since the project weve provided services to more than 425 local government election websites in 33 states.

1.1.1.1: We released 1.1.1.1 to help fix the foundation of the Internet by building a faster more secure and privacy-centric public DNS resolver. This is available publicly for everyone to use - it is the first consumer-focused service Cloudflare has ever released. Heres the deal - we dont store client IP addresses never ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers.

Sound like something youd like to be a part of Wed love to hear from you!

Please note that applicants who progress to the offer stage of the interview process may be asked to attend an in-person interview within one of the Cloudflare Offices or Cloudflare Hubs. More details about this will be available at that stage of the interview process.

This position may require access to information protected under U.S. export control laws including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license.

Cloudflare is proud to be an equal opportunity employer. We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness. All qualified applicants will be considered for employment without regard to their or any other persons perceived or actual race color religion sex gender gender identity gender expression sexual orientation national origin ancestry citizenship age physical or mental disability medical condition family care status or any other basis protected by law. We are an AA/Veterans/Disabled Employer.

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