Security Engineer (Applied Research & Labs)

Cloudflare; United Kingdom; Hybrid; GBP 90,000 - 140,000; Full time

Benefits offered by this job

Competitive pay and stock ownership

Generous vacation policy

Parental leave

Comprehensive health benefits

Commuter program

Wellbeing programs

Job summary

Cloudflare Security seeks a Security Engineer to design agentic tooling and labs, embedding with Cloudflare Security teams and representing external work.

Responsibilities include building lab infrastructure, releasing open-source references, and delivering hands-on workshops for customers and partners."

Qualifications

• 4+ years in software engineering, shipping and operating production systems.
• Experience building interactive labs and hands-on learning platforms.
• Hands-on experience building LLM-based systems with agent orchestration.
• Knowledge of application and infrastructure security and secure SDLC.
• Published technical writing or open-source contributions.

Responsibilities

• Design and build agentic security workflows and tooling for Cloudflare Security.
• Release internal harnesses and workflows as open-source reference implementations.
• Implement on Cloudflare Workers, Durable Objects, Workflows, and related stacks.
• Define the scope and sequencing of each lab and the required scaffolding.
• Build and operate lab infrastructure with per-participant isolation and provisioning.
• Run hands-on workshops for customers and partners to deploy the tooling.

Skills

Agent orchestration

LLM-based systems

Security engineering

TypeScript

Python

Open-source contributions

Labs / hands-on learning

Developer education

Cloudflare technologies

Tools

Cloudflare Workers

Durable Objects

Workflows

Agents SDK

Job description

• Cloudflare is seeking a Security Engineer to design and build agentic security tooling for Cloudflare Security, and to release that work as open-source reference implementations, interactive labs, and technical workshops for customers and partners
• This role sits in the Applied Research & Labs function within the Office of the CSO. You will work embedded with Cloudflare’s security teams, build on Cloudflare’s Developer Platform, and represent the team’s security & engineering work externally
• Design and build agentic security workflows and tooling for Cloudflare Security, including multi-agent orchestration, tool integration, and evaluation harnesses
• Release internal harnesses, skill definitions, and orchestration workflows as documented open-source reference implementations
• Implement on Cloudflare Workers, Durable Objects, Workflows, Workers AI, AI Gateway, and the Agents SDK
• Define the technical scope and sequencing of each lab, including the failure modes participants will hit and the scaffolding they need
• Build and operate the lab infrastructure: per-participant isolation, automated provisioning, state reset, and teardown
• Run hands-on workshops where customers and partners build and deploy the tooling themselves
• Document and package workshop formats so other Cloudflare engineers can deliver them
• Present Cloudflare’s agentic security architecture through customer briefings and conference talks
• Author technical deep dives and architecture write-ups that establish Cloudflare Security as a recognized voice in the security community
• Partner with Product and Engineering to align external technical content with the roadmap
• Occasional work outside standard hours to support sessions across EMEA and APAC time zones

Benefits

• Competitive pay: We offer a competitive total rewards package, where every employee is an owner of our stock.
• Take-what-you-need vacation: We encourage employees to find a comfortable work-life balance by taking as many days off as they need while still being able to perform their jobs satisfactorily. (We really mean it!)
• Paid maternity & paternity leave: Our global parental leave policy allows up to sixteen paid weeks of bonding leave time for all qualifying new parents.
• Employee benefits: We offer a comprehensive benefits package including healthcare, life insurance, short- and long-term disability, pension plans in accordance with the market practice in our locations.
• Commuter program: We are flexible about where we work and value connecting at the office. Our commuter benefits program is in place to support team members’ commute to work via public transportation without the extra cost burden.
• Wellbeing: Global offerings that provide mental health, childcare and family forming support to our employees across our offices.

4+ years in software engineering, shipping and operating production systemsDemonstrated experience building interactive labs, hands-on learning platforms, or developer training environments, including the infrastructure behind themHands-on experience building LLM-based systems, including agent orchestration, tool use, context engineering, and evaluationWorking knowledge of application and infrastructure security, including common vulnerability classes and secure development practicesPublished technical writing, conference talks, or open-source contributionsExperience with Cloudflare Workers, Durable Objects, Workflows, Workers AI, AI Gateway, and Vectorize, or an equivalent serverless stackProficiency in TypeScript, Python, or a comparable language, with production experience in distributed or event-driven systemsStrong design judgment for technical learning experiences, including scope, sequencing, and knowing what to leave outHands-on security background in any domainExperience with the Cloudflare Agents SDKExperience with developer education, technical certification programs, or developer relationsMaintainer or significant contributor to an open-source security or developer tooling projectExperience speaking at security or developer conferences