Senior Staff+ Software Engineer, Kubernetes Platform na Anthropic

Híbrido - London, UK

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Anthropic, a public benefit corporation focused on building safe and beneficial AI systems, is seeking a Senior Staff+ Software Engineer for its Kubernetes Platform team in London. The role involves owning and extending Anthropic’s large-scale Kubernetes scheduler, scaling the control plane components (apiserver, etcd, controller‑manager) to support massive clusters, designing core cluster services such as service discovery, and building custom controllers, operators, and CRDs. The engineer will partner with research, training, and inference teams to translate workload requirements into platform capabilities, collaborate with cloud providers, and participate in on‑call and incident response activities.

Salary

GBP 325,000 - 485,000

Requirements

Skills

  • Significant software engineering experience building and operating production distributed systems
  • Proficiency in at least one systems-appropriate language (e.g., Go, Python, Rust, or C++)
  • Deep, hands‑on Kubernetes experience (well beyond “user of”) into scheduler, controllers, apiserver, or operating large multi‑tenant clusters
  • Demonstrated ability to debug complex issues across the stack, from API behavior down to node and network‑level root causes
  • A track record of designing for reliability, correctness, and clear failure semantics in systems other engineers depend on
  • Strong written and verbal communication; comfort building consensus with internal stakeholders
  • Experience with Kubernetes internals or contributions: kube‑scheduler / scheduling framework, apiserver, etcd, client‑go, controller‑runtime, or similar
  • Experience building or operating cluster schedulers or batch systems (e.g., Kueue, Volcano, Slurm, or in‑house equivalents)
  • Background scaling control planes or coordination systems (etcd, ZooKeeper, Consul, or large DNS/service‑mesh deployments)
  • Familiarity with ML infrastructure: GPUs, TPUs, or Trainium; gang scheduling; topology‑aware placement; collective networking such as NCCL
  • Experience with GCP and/or AWS, including GKE/EKS internals and Infrastructure as Code
  • Low‑level systems experience such as Linux kernel tuning, cgroups, or eBPF
  • 12+ years of relevant industry experience, including time leading large, ambiguous infrastructure projects

Responsibilities

  • Own, operate, and extend the Kubernetes scheduler for Anthropic's accelerator fleets, including custom scheduling plugins and policies for gang scheduling, topology awareness, and preemption
  • Scale the Kubernetes control plane (apiserver, etcd, controller‑manager) to support clusters far beyond typical limits, and find the next bottleneck before it finds us
  • Design, build, and operate core cluster services such as service discovery that every workload in the fleet depends on
  • Build and maintain custom controllers, operators, and CRDs
  • Partner with research, training, and inference to understand workload shapes and turn their requirements into platform capabilities
  • Collaborate with cloud providers on required features and escalations
  • Participate in on‑call, lead incident response, and design processes (postmortems, runbooks, SLOs) that help the team avoid repeating failures

Technologies

KubernetesGoPythonRustC++etcdapiservercontroller‑runtimeclient‑goGKEEKSGCPAWSLinux kerneleBPFcgroupsNCCL

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