Model Performance Software Engineer, Claude CodeActive$405K

The opportunity

We're looking for a Staff Software Engineer to set technical direction at the intersection of engineering and research on the Claude Code team. In this role, you'll partner directly with Anthropic's researchers and engineering leadership to shape how we measure, understand, and improve Claude's coding capabilities.

What you'll do

  • Set technical direction for evaluation systems, research infrastructure, and: internal tooling across the Claude Code team

  • Architect eval frameworks that measure model capabilities across diverse: coding tasks and scale with our research roadmap

  • Lead the design of infrastructure that enables researchers to run experiments: at scale, and make the foundational tradeoffs that shape how the team operates for years

  • Identify the highest-leverage engineering investments—often before anyone has: asked for them—and drive them to completion

  • Serve as a senior technical bridge between product and research, using strong: product intuition to influence which capabilities we prioritize and how we measure progress against them

  • Mentor and raise the bar for other engineers on the team; review designs,: unblock peers, and model the engineering standards we want to scale

What they're looking for

  • Partner with research leads to translate ambiguous research questions into durable engineering solutions
  • Own critical systems end-to-end, from architecture through production: reliability, and take responsibility for their long-term health