Vulnerability Defense Software Engineer, Cloudforce One

Cloudflare•San Francisco, CA

3d•Hybrid

About The Position

Cloudforce One is Cloudflare’s threat operations and research team, responsible for identifying and disrupting cyber threats ranging from sophisticated cyber criminal activity to nation-state sponsored advanced persistent threats (APTs). Cloudforce One works in close partnership with external organizations and internal Cloudflare teams, continuously developing operational tradecraft and expanding ever-growing sources of threat intelligence to enable expedited threat hunting and remediation. Members of Cloudforce One are at the helm of leveraging an incredibly vast and varied set of data points that only one of the world’s largest global networks can provide. The team is able to analyze these unique data points, at massive scale and efficiency, synthesizing findings into actionable threat intelligence to better protect our customers. As a Software Engineer on this team, you build and evolve systems that help security practitioners assess technical risk, investigate complex systems, prioritize issues, and deliver actionable guidance to engineering teams. You will be responsible for translating complex security requirements and investigative methods into robust, scalable, and high-performance applications that have a direct impact on making the internet better, safer, and more powerful every day.

Requirements

Working knowledge of cybersecurity concepts such as threat modeling, attack techniques, trust boundaries, exploitability, and defensive controls
Familiarity with incident response workflows, network containment, and remediation
Practical experience in vulnerability research/exploit development and translating findings into actionable mitigations
Experience with AI-assisted development and designing agentic AI workflows
At least 5 years of experience building large-scale software applications, preferably distributed systems
Experience designing and integrating RESTful APIs and/or gRPC services
Knowledge of SQL and common relational database systems such as PostgreSQL
Ability to independently define and deliver solutions in ambiguous problem spaces
Prior experience writing production-ready code in Go and/or TypeScript
Excellent debugging and optimization skills
Expertise in writing well-tested code
Interest in opportunities to be a technical mentor for teammates

Nice To Haves

Application security, security research, or security automation experience
Deep understanding of DNS, TLS/SSL and HTTP
Experience evaluating probabilistic systems

Responsibilities

Design, build, run, and scale distributed tools and services that translate security tradecraft into scalable, evidence-based systems and workflows.
Partner with security practitioners to understand workflows, bottlenecks, and opportunities for automation.
Improve system design and architecture to ensure stability, performance, and maintainability of both internal and customer-facing services.
Analyze, communicate, and help prioritize complex technical concepts across teams.
Mentor and guide other developers in the team, helping to build collective technical expertise and promote best practices for writing well-tested, modular, and reusable code.
This role may require flexibility to be on-call outside of standard working hours to address technical issues as needed.

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
Short and Long Term Disability Insurance
Life & Accident Insurance
401(k) Retirement Savings Plan
Employee Stock Participation Plan
Flexible paid time off covering vacation and sick leave
Leave programs, including parental, pregnancy health, medical, and bereavement leave