Senior Systems Engineer

Senior Systems EngineerHybridAbout the RoleThis is a hands-on software engineering role on the Cloudflare One Appliance team. You will shape and build the Linux-based edge runtime and distributed control plane that connect customer sites to Cloudflare. As a Senior Systems Engineer, you will work across low-level systems, distributed services, and API design while providing technical leadership for major initiatives. Our architecture follows a "light branch, heavy cloud" philosophy: policy and intelligence belong in Cloudflare's network unless locality is required for correctness, survivability, performance, or user experience. You will use strong technical judgment to decide what belongs to the appliance and what belongs in the Cloudflare's network, building systems that are secure, observable, resilient to partial failures, and safe to operate across a large fleet carrying customer-critical traffic.ResponsibilitiesBuild systems end to end: Design and implement capabilities spanning the cloud control plane, Linux appliance runtime, telemetry pipeline, and physical, virtual, and cloud deployment environments.Build a Linux-based networking platform: Develop and harden the appliance dataplane. Build secure, reliable networking capabilities using technologies such as IPsec, MASQUE, eBPF, and Linux kernel networking primitives while keeping the system small, predictable, and secure.Engineer reliable fleet control: Build distributed control-plane and state-management systems that safely deliver configuration and commands, tolerate intermittent connectivity and partial failures, converge to known-good state, and support zero-touch operation across large device fleets.Secure the device lifecycle: Improve hardware-backed identity, attestation, secure boot, immutable operating-system images, credential rotation, and staged over-the-air upgrades with safe rollback and recovery.Make operability a product feature: Design telemetry, diagnostics, synthetic tests, support bundles, and remote operations that help customers and support teams understand the system without treating the appliance as a black box.Drive customer-centered product decisions: Work with customers, Product, Support, and Solutions Engineering to understand customer requirements and turn them into pragmatic technical direction. Bring clear opinions, and revise them when customer feedback or production evidence points to a better answer.Own production outcomes: Prototype quickly, ship in safe increments, and own rollout, monitoring, incident follow-up, and long-term maintainability.Lead across teams: Set architectural direction for major initiatives, write clear technical proposals, conduct rigorous reviews, and mentor other engineers. Build executable plans with Cloudflare WAN, Gateway, DEX, the Cloudflare One Client, and platform and security teams.Role RequirementsMust-Have Skills8+ years of professional software engineering experience building complex production systems.Strong software engineering skills in Rust, C/C++, Go, or a comparable system programming language, with the ability to work across the stack, including TypeScript.Strong understanding of Linux networking internals, with experience building against the kernel networking stack using eBPF/XDP, netlink, and network namespaces.Experience designing and implementing distributed control planes, desired-state reconciliation, remote configuration, or similar systems that manage large, intermittently connected fleets.Experience designing secure systems, including threat modeling, least privilege, credential handling, and software supply-chain integrity.A track record of owning ambiguous initiatives from discovery through production, including architecture, implementation, staged deployment, incident response, and failure analysis.Technical leadership and communication skills that let you influence decisions, explain system trade-offs to different audiences, and bring stakeholders toward a clear outcome.Product judgment grounded in customer evidence, usability, and operational simplicity.Practical experience using AI-assisted engineering tools, coding agents, harnesses, or automation responsibly to improve engineering quality and throughput.Nice-to-Have SkillsExperience building networking products or systems, such as SD-WAN, SASE, SDN platforms, or network operating systems.Experience building custom or embedded Linux distributions with immutable, image-based update systems such as RAUC, bootc, or OSTree.Experience with UEFI Secure Boot, TPMs, hardware-backed identity, or remote attestation.Experience building networking features such as high-availability failover, dynamic routing, multi-WAN, traffic steering or shaping, application identification, or local policy enforcement.Experience building automated fleet tests, hardware-in-the-loop or network-in-the-loop test environments, safe staged rollouts, and remote diagnostic tooling.