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Software Engineer, Security Rules

Cloudflare· Engineering
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Hybrid (London (UK)), Hybrid (Lisbon (Portugal))€54k - €75kFull-timePosted 1mo ago

About the role

Software Engineer to join Cloudflare's Security Rules team, building and operating microservices (primarily in Rust) for Application Security products such as Rate Limiting and Web Application Firewall, on a hybrid basis with available locations in London and Lisbon.

Responsibilities

  • Design, implement, and maintain the software systems that comprise Cloudflare’s Application Security Product Offering such as Rate Limiting, Web Application Firewall and more.
  • Participate in all stages of the software development lifecycle, from designing and documenting systems to writing code, automated tests, and monitoring production deployments.
  • Collaborate with internal teams, including security, network engineering, SRE, and product management, to design scalable solutions to difficult technical problems.
  • Review work from your peers throughout all stages of the development lifecycle to ensure high-quality, maintainable code.
  • Mentor team members and work with support teams to ensure customer delight and bring out the best in everyone.
  • Debug issues in complex systems and contribute to the maintenance and improvement of operational health.
  • Work with a wide range of technologies and programming languages, including Rust, Go, as well as various databases (SQL and No-SQL), Docker, and Kubernetes.

Qualifications

  • 3+ years of relevant professional experience with a technology company
  • Strong programming skills in Rust, Go, C++, or a similar systems-level language
  • Experience building and operating distributed systems
  • Experience with monitoring, alerting and debugging high volume production systems
  • Experience with databases (PostgreSQL, Clickhouse and Memcached)
  • Strong interpersonal and communication skills, empathy, teamwork and ownership

Skills

Required:RustDistributed systemsMonitoring/ObservabilityDatabases
Nice to have:GoC++ or similar systems language

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 9, 2026. Interested? Apply on the company site.

About Cloudflare

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