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Senior Software Engineer, Internal Fraud Platform

CloudflareHybridEngineering
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Salary
Not listed
Job type
Full-time
Posted
14 Sept 2026
Status
Open · checked 7d ago

About this role

The Senior Software Engineer, Internal Fraud Platform role at Cloudflare is a hybrid position focused on building foundational infrastructure to protect the company from abuse and fraudulent activities. This opportunity suits an experienced software engineer who wants to drive 0-to-1 platform development and partner closely with data science teams.

Role Overview

Cloudflare is searching for its first software engineer to join the Internal Fraud Platform team. This group handles issues such as payment fraud, chargebacks, account takeovers, fraudulent signups, and trial abuse. The founding engineer acts as the vital bridge between internal Cloudflare systems and fraud detection capabilities, designing the event ingestion pipelines, scoring services, and specialized investigation tools for analysts.

Key Responsibilities

Design, build, and operate services and pipelines that ingest fraud-related events from internal systems like billing, support, and signups, and route decisions accordingly.
Partner with data scientists and machine learning engineers to expose necessary event data and contextual features for model scoring, and integrate decisions back into operational pipelines.
Create internal tools and workflows enabling Trust and Safety, Support, and Finance analysts to investigate flagged accounts and take action.
Own projects end-to-end from problem definition through design, rollout, and operation with minimal oversight.
Build fault-tolerant, reliable systems that handle high event volumes and retries without dropping or duplicating critical data.
Help establish the architecture patterns, tooling choices, and engineering standards for a growing team.
Collaborate cross-functionally with Product, Billing/Fintech, Support, and Trust and Safety teams to turn fraud vectors into technical requirements.

Requirements

Five or more years of professional software engineering experience or equivalent practical background.
Experience building and operating production distributed systems or backend services.
Experience designing and building data or event pipelines utilizing tools like Kafka or Pub/Sub.
Strong understanding of RESTful APIs, service security, and API standards such as OAuth, JWT, or OpenAPI.
Working knowledge of SQL, relational databases like MySQL or PostgreSQL, and data modeling.
Comfort owning ambiguous, 0-to-1 problems with limited existing infrastructure.
Strong troubleshooting, project ownership, and cross-functional communication abilities.

Nice to Have

Experience working in payments, risk, trust and safety, or fraud engineering.
Familiarity with feature engineering and machine learning serving concepts.
Experience with transactional systems, subscriptions, or billing platforms.
Background in building internal dashboards or tools for non-engineering stakeholders.

Skills and Tools

SQL
Kafka
Pub/Sub
RESTful APIs
OpenAPI, OAuth, JWT
Relational databases (PostgreSQL, MySQL)
Distributed systems and backend services

About the Company

Cloudflare operates a massive global network that accelerates and protects millions of internet properties, ranging from individual blogs to Fortune 500 companies, without adding hardware or software. Recognized for its innovative culture, the company is dedicated to building a better internet through initiatives like Project Galileo, the Athenian Project, and the privacy-centric 1.1.1.1 public DNS resolver.

How to Apply

Interested candidates should visit the official Cloudflare careers page to submit an application for this position.

Skills and tech stack

SQLKafka

Questions candidates ask

What is the primary focus of the Internal Fraud Platform team at Cloudflare?

The team focuses on protecting Cloudflare from fraudulent signups, payment fraud, chargebacks, trial and promo abuse, and account takeovers.

Is this a remote or hybrid position?

This position is listed as a hybrid role.

What technical experience is required for this role?

Candidates need 5+ years of professional software engineering experience, background in distributed systems or backend services, event pipeline experience with tools like Kafka, and working knowledge of SQL and RESTful APIs.

What are some of the nice-to-have qualifications?

Bonus points include experience in fraud, risk, or payments engineering, familiarity with ML serving and feature engineering, background in billing systems, and experience building internal tools for non-engineering stakeholders.

How can I apply for this job?

You can apply by visiting the official Cloudflare careers page.

Ready to apply?

The application is on the official Cloudflare careers page.

Apply on company site