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Software Engineer

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Senior Software Engineer

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Senior Software Engineer, Security Rules

Requirements

  • 6+ years of relevant professional experience with a technology company
  • Strong programming skills in Rust, Go, C++, or a similar systems-level language
  • Demonstrated ability to lead complex technical projects from ambiguity through delivery
  • Experience building and operating distributed systems
  • Strong interpersonal and communication skills, demonstrating empathy, teamwork and a sense of ownership
  • Experience mentoring engineers, reviewing technical designs and providing high-quality code review
  • Experience with monitoring, alerting and debugging high volume production systems
  • Experience with databases (we use PostgreSQL, Clickhouse and Memcached)

Nice to Haves

  • Experience influencing technical direction across a team or product area
  • Experience improving engineering practices, operational processes, or reliability for production services
  • Experience with modern Unix/Linux development and runtime environments
  • Experience with monitoring and logging tools like Prometheus and Grafana
  • Experience with containerization and orchestration technologies, such as Docker and Kubernetes

What you'll be doing

  • Design, implement, and maintain the software systems that comprise Cloudflare’s Application Security Product Offering such as Rate Limiting, Web Application Firewall and more
  • Lead technical design and execution for complex projects, helping define architecture, tradeoffs, milestones, and delivery plans
  • Collaborate with internal teams, including security, network engineering, SRE, and product management, to design scalable solutions to difficult technical problems
  • Help raise the technical bar for the team by identifying systemic improvements, reducing operational toil, and influencing long-term engineering direction
  • Review work from your peers throughout all stages of the development lifecycle to ensure high-quality, maintainable code
  • Mentor engineers across the team by sharing technical context, providing thoughtful code and design feedback, and helping others grow in scope and ownership
  • 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

Perks and 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
AI Summary ✨
Cloudflare logo

Cloudflare

Portugal, UK

Experience: Senior
Posted: September 7, 2026
Last seen: 2 hours ago
Docker
Golang
Kubernetes
Nodejs
Postgresql
Redis
Rust
backend

Why we track Cloudflare

Cloudflare has EU offices in London, Lisbon, and Munich. They sit at the edge of the internet—literally. The engineering work around CDN, security, and performance is technically deep. One of the more interesting infrastructure companies to work at.

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