Staff + Sr. Software Engineer, Cloud Inference Launch Engineering

Anthropic Anthropic · AI Frontier · San Francisco, CA · Software Engineering - Infrastructure

Staff + Sr. Software Engineer role focused on scaling and optimizing Claude's inference on cloud platforms (AWS, GCP, Azure). Responsibilities include owning the end-to-end product of Claude on each cloud platform, API integration, intelligent request routing, inference execution, capacity management, and day-to-day operations. The role involves validating inference server and load balancer changes, ensuring correctness, performance, and reliability. Key tasks include bringing up inference for new model architectures, integrating new inference features, fixing cross-platform differences, designing and owning CI/CD infrastructure, driving down cycle time for validation, and analyzing observability data for bottlenecks and regressions.

What you'd actually do

  1. Be on the critical path for frontier model launches, bringing up inference for new model architectures and shipping them to cloud platforms in lockstep with our first-party platform
  2. Work with the core inference team to bring new inference features (e.g. structured sampling, prompt caching, and more) to cloud platforms, owning the platform-specific integration that gets them to production
  3. Identify and dive deep on the gaps that make inference behave differently across first-party and CSPs — config drift, observability, deployment patterns, hard cross-platform bugs — and fix them at the source rather than building platform-specific workarounds
  4. Design, build, and own the CI/CD infrastructure for the inference server and load balancer across cloud platforms, with shadow traffic, performance baselines (throughput and latency), and correctness checks that catch regressions before production
  5. Drive down merge-to-production cycle time by making validation faster, more parallel, and cost-effective enough to run on the same constrained accelerator pool that serves customers, without trading away reliability

Skills

Required

  • significant software engineering experience
  • strong background in high-performance, large-scale distributed systems serving millions of users
  • track record of building automation or test infrastructure that measurably improved release velocity or reliability
  • experience building or operating services on at least one major cloud platform (AWS, GCP, or Azure)
  • exposure to Kubernetes, Infrastructure as Code, or container orchestration
  • thrive in cross-functional collaboration with both internal teams and external partners
  • fast learner who can quickly ramp up on new technologies, hardware platforms, and provider ecosystems
  • highly autonomous and take ownership of problems end-to-end

Nice to have

  • LLM inference optimization, batching, and caching strategies
  • Capacity-constrained scheduling or shared-resource test infrastructure
  • Solid understanding of multi-region deployments, request routing, load balancing, global traffic management
  • Working with CSP partner teams to scale infrastructure across multiple platforms, navigating differences in networking, security, privacy, and managed service
  • Proficiency in Python or Rust

What the JD emphasized

  • critical path
  • frontier model launches
  • inference server
  • load balancer
  • cloud platforms
  • correctness
  • performance
  • reliability
  • CI/CD infrastructure
  • merge-to-production cycle time
  • cost-effective
  • constrained accelerator pool
  • observability data
  • performance bottlenecks
  • cost anomalies
  • regressions
  • high-performance, large-scale distributed systems
  • automation or test infrastructure
  • measurably improved release velocity or reliability
  • Kubernetes
  • Infrastructure as Code
  • container orchestration
  • cross-functional collaboration
  • fast learner
  • highly autonomous
  • take ownership of problems end-to-end

Other signals

  • LLM serving
  • inference server
  • load balancer
  • cloud platforms
  • release velocity
  • reliability
  • performance
  • capacity management