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Principal Engineer - Cloudforce One

CloudflareHybridSecurity
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Salary
Not listed
Job type
Full-time
Posted
29 Jun 2026
Status
Open · checked 7d ago

About this role

Cloudflare is hiring a Principal Engineer for Cloudforce One to drive architectural direction and technical strategy across threat operations and research systems. This hybrid role suits an experienced technologist with a background in cybersecurity and distributed systems who wants to build solutions that protect a major global network.

Role Overview

The Principal Engineer for Cloudforce One operates as part architect, threat analyst, and disruptor across Cloudflare. This position spans multiple teams, codebases, and products to help detect, analyze, and neutralize sophisticated cyber threats. The person in this role tackles complex architectural challenges, designs large-scale data pipelines, and integrates AI-assisted development practices into daily threat operations.

Key Responsibilities

Drive architectural direction and technical strategy across Cloudforce One engineering services in Kubernetes, on the edge, and throughout the global network.
Design and build critical data pipelines and services to collect, enrich, and analyze threat intelligence and abuse signals at massive scale.
Identify and dismantle technical bottlenecks, legacy patterns, and architectural debt that impact threat detection and response.
Collaborate closely with Threat Intelligence researchers, Trust & Safety analysts, Product, Legal, and other engineering teams.
Develop and champion agentic AI workflows and AI-assisted development practices to accelerate threat hunting and detection engineering.
Serve as a technical force multiplier across multiple concurrent projects, mentoring and elevating engineering talent.
Maintain operational excellence of key systems, participating in on-call rotations and incident response.

Requirements

15+ years of cyber security experience focusing on building systems to present adversarial trends and techniques.
10+ years of experience building and operating large-scale distributed systems in production with expertise in complex architecture.
Deep, hands-on proficiency in Go and/or TypeScript with production deployment experience in Kubernetes and edge computing platforms.
Subject matter expertise in threat intelligence, adversarial analysis, or detection engineering, including familiarity with the Cyber Kill Chain and TTP tracking.
Proven ability to lead technical initiatives spanning multiple teams and complex problem domains.
Strong architectural judgment regarding building, refactoring, or redesigning systems.
Experience designing and operating critical data pipelines like Kafka or Temporal, along with SQL databases and caching layers at scale.
Excellent communication skills to explain complex designs to leadership and debug issues with team members.
Track record as a disruptor who improves how organizations operate.

Nice to Have

Experience in Trust or Safety, platform abuse, phishing detection, malware analysis, fraud prevention, or content moderation.
Proficiency in writing detection rules using YARA, Snort, or similar languages.
Experience analyzing adversary TTPs across web-based threat vectors.
Familiarity with Rust, Terraform, and infrastructure-as-code practices.
Experience building threat intelligence platforms, IOC distribution systems, or automated mitigation pipelines.
Experience with React for internal tooling and analyst-facing applications.
Understanding of DNS, TLS/SSL, HTTP, and web security standards.

Skills and Tools

Go, TypeScript, JavaScript, Rust
Kubernetes, Cloudflare Workers, D1
Kafka, Temporal
SQL, PostgreSQL, Redis
Terraform
React

Salary and Benefits

Eligible to participate in Cloudflare’s equity plan.
Comprehensive health and welfare benefits including medical, dental, vision insurance, flexible spending accounts, and commuter spending accounts.
Family-forming benefits, fertility benefits, and on-demand mental health support including an Employee Assistance Program.
Global travel medical insurance.
Financial security programs such as short and long-term disability insurance, life and accident insurance, a 401(k) retirement savings plan, and an employee stock participation plan.
Generous paid time off covering vacation and sick leave, alongside structured leave programs for parental, medical, pregnancy health, and bereavement needs.

About the Company

Cloudflare runs a large global network powering millions of internet properties, protecting and accelerating applications without adding hardware or changing code. The company champions a better and more secure internet through initiatives like Project Galileo, the Athenian Project, and the privacy-centric public DNS resolver 1.1.1.1. Cloudflare values curiosity over bureaucracy, iteration, and leveraging AI to solve tough challenges.

How to Apply

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

Skills and tech stack

SQLKubernetesReactTypeScriptJavaScriptRustKafkaTerraform

Questions candidates ask

What experience is required for this role?

Candidates need 15+ years of cyber security experience with an emphasis on building systems for adversarial trends, alongside 10+ years of experience building and operating large-scale distributed systems in production.

What programming languages and technologies are used?

The role requires deep hands-on proficiency in Go and/or TypeScript, with production experience in Kubernetes and edge computing platforms like Cloudflare Workers. Familiarity with Rust, Kafka, Temporal, SQL, Redis, Terraform, and React is also relevant.

What are the primary responsibilities of the Principal Engineer?

Responsibilities include driving architectural direction for Cloudforce One, building threat intelligence data pipelines, developing agentic AI workflows, mentoring engineering talent, and participating in on-call and incident response rotations.

Where is this job located?

This is a hybrid position with available locations including Austin, TX (US) and London (UK).

Are benefits provided with this position?

Yes, Cloudflare offers medical, dental, vision, disability and life insurance, 401(k), employee stock participation, flexible paid time off, parental leave, and equity plan participation for eligible employees.

Ready to apply?

The application is on the official Cloudflare careers page.

Apply on company site