Senior Software Engineer, Security Rules

Cloudflare
Lisbon, London
Workplace: HybridFull timeEUR 66,000 - 91,000 annuallyFunction: Software EngineeringExperience: 6+ yearsSkills: ["Ownership","Communication","Empathy","Teamwork","Mentoring"]

Design, implement, and operate systems for Cloudflare’s Application Security product suite, including Rate Limiting and Web Application Firewall. Lead complex technical projects end-to-end—from design and architecture tradeoffs through production operations—while collaborating with security, network engineering, SRE, and product teams. Improve reliability and engineering practices by reducing operational toil, mentoring engineers, and maintaining high-quality code across Rust-based microservices and supporting infrastructure.

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FursaFursa
Cloudflare
Cloudflare
1 day ago

Senior Software Engineer, Security Rules

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Last checked: 12 minutes agoStatus: Live

Job Summary

Design, implement, and operate systems for Cloudflare’s Application Security product suite, including Rate Limiting and Web Application Firewall. Lead complex technical projects end-to-end—from design and architecture tradeoffs through production operations—while collaborating with security, network engineering, SRE, and product teams. Improve reliability and engineering practices by reducing operational toil, mentoring engineers, and maintaining high-quality code across Rust-based microservices and supporting infrastructure.
Location: Lisbon, London
Workplace: Hybrid
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Design, implement, and maintain software systems for Cloudflare’s Application Security product offering such as Rate Limiting and Web Application Firewall.
  • •Lead technical design and execution for complex projects, defining architecture, tradeoffs, milestones, and delivery plans.
  • •Collaborate with internal teams (security, network engineering, SRE, and product management) to design scalable solutions.
  • •Raise the technical bar by identifying systemic improvements, reducing operational toil, and influencing long-term engineering direction.
  • •Review peers’ work across the development lifecycle and mentor engineers with feedback to improve quality and maintainability.

Pay and Benefits

Salary: EUR 66,000 - 91,000 annually
Equity and Bonus:Equity
Perks:Health InsuranceDentalVision401kPaid LeaveParental LeaveEmployee Assistance

Key Requirements

  • •6+ years of relevant professional experience in a technology company.
  • •Strong programming skills in Rust, Go, C++, or a similar systems-level language.
  • •Proven ability to lead complex technical projects from ambiguity through delivery.
  • •Experience building and operating distributed systems at high scale.
  • •Experience mentoring engineers and providing high-quality code reviews and technical design feedback.
Experience:6+ yearsTechnology companyDistributed systems
Skills:OwnershipCommunicationEmpathyTeamworkMentoring
Tech Stack:RustGoC++DockerKubernetesPostgreSQLClickhouseMemcachedGRPCKafkaRedisSQLNo-SQLUnix/LinuxPrometheusGrafana

Company Brief

Cloudflare
Provides a global network and cloud platform that delivers security, performance, and reliability services for web applications, APIs, and Internet properties, including CDN, DDoS protection, DNS, and zero-trust security solutions.
Industry: Cybersecurity
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: San Francisco, United States
Founded: 2009
WebsiteLinkedIn