Software Engineer
Senior Software Engineer building and operating network infrastructure that carries traffic across critical paths of a global network. The role requires systems programming, Linux kernel networking and eBPF expertise, distributed-systems experience, and knowledge of BGP and Internet routing.
About the job
Responsibilities
- Build and extend software systems that carry traffic across critical paths of Cloudflare's global network, spanning host-server Linux kernel networking, network hardware dataplanes, and physical interconnects.
- Participate in the full software development lifecycle, including system design and documentation, coding, automated testing, production deployment planning, and monitoring.
- Collaborate with operations and customer-facing product teams to align network capabilities with business needs.
- Operate systems under a “Run What You Build” model and participate in the on-call rotation.
Requirements
- Systems-level programming experience in Go, Python, Rust, C, or C++.
- Experience with Linux kernel network stack development, particularly eBPF.
- Strong understanding of BGP and Internet routing.
- Experience implementing, deploying, and debugging mission-critical distributed systems.
- Ability to learn and adopt new technologies.
- Strong collaboration and communication skills.
- Willingness to integrate AI tools and systems into engineering workflows.
Nice-to-haves
- Familiarity with vendor switching SDKs.
- Familiarity with SR-MPLS, sFlow, BGP-LS, and PCE protocols.
- Experience writing packet-processing software, such as eBPF at TC or XDP and DPDK.
- Professional experience using AI-assisted development tools for code completion, codebase analysis, or log and data exploration.
- Experience participating in an on-call rotation.
Compensation
- Portugal-based hires: estimated annual salary of €68,000–€91,000.
- Eligible to participate in the company equity plan.
Skills
Linux Kernel, Ebpf, Go, Python, Rust, C++, BGP, Internet Routing, Distributed Systems, Dpdk, Sr-Mpls, Sflow, Bgp-Ls, Pce
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