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Senior Software Engineer, Internal Fraud Platform

Cloudflare· Engineering
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Hybrid (Hybrid)Full-timePosted 1mo ago

About the role

Senior software engineer role building and operating Cloudflare's Internal Fraud Platform to ingest, evaluate, and route fraud signals from internal systems, partner with data science to productionize models, and build tools for analysts in Trust & Safety, Support, and Finance.

Responsibilities

  • 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 team's 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 oversight. In many ways this is a 0-to-1 team, and you'll 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 operational health.
  • Shape Technical Direction: Help establish 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.

Qualifications

  • 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.

Skills

Required:Distributed systemsData pipelinesRESTful APIs and API standardsSQL / relational databasesAmbiguity management

Benefits

  • 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
Last updated Sep 16, 2026. Interested? Apply on the company site.

About Cloudflare

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