Staff+ Software Engineer (Experimentation)

Join Anthropic, a leading AI safety and research company. As a Staff+ Software Engineer, you will be responsible for the configuration and experimentation systems that enable safe rollouts, controlled experiments, and data-driven decision-making across our products and infrastructure. You will own the technical strategy and roadmap for config and experimentation infrastructure, maintain and enhance the architecture, design and build scalable infrastructure, and define standards and tooling for experimentation and configuration management.

• Own the technical strategy and roadmap for configuration and experimentation infrastructure, translating team-level goals into concrete execution plans.
• Maintain and enhance the architecture for feature flagging, dynamic configuration, and experimentation systems, ensuring the hardest problems get solved.
• Design and build scalable, reliable distributed infrastructure and shared libraries that support high-volume experimentation and configuration workloads across all engineering teams.
• Have experience with container orchestration and infrastructure at scale
• Are obsessed with developer productivity and reducing friction in how teams configure, test, and ship changes
• Have strong proficiency in Python, Rust and/or Go
• Are excited about designing foundational systems and are comfortable working independently on ambiguous, high-impact technical challenges
• Have deep experience with configuration management, feature flagging, and/or experimentation platforms in a large-scale environment
• Have excellent communication skills and enjoy supporting internal partners to improve their development experience
• Experience designing experimentation frameworks — randomization, assignment, metrics pipelines, and statistical analysis for A/B testing at scale
• Experience building CLI tools, developer-facing services, and APIs/automation workflows that integrate config and experimentation into existing CI/CD pipelines
• Have 3+ years (not including internships or co-ops) of experience leading large scale, complex projects or teams as an engineer or tech lead
• Experience with config or experimentation platforms such as Statsig, GrowthBook, LaunchDarkly, Optimizely, Unleash, or similar (including building such systems in-house)
• Experience with dynamic configuration systems and safe rollout mechanisms (gradual rollouts, kill switches, targeting rules)
• Have 15+ years (not including internships or co-ops) of experience in a Software Engineer role, building and operating large-scale developer infrastructure
• Minimum education: Bachelor’s degree or an equivalent combination of education, training, and/or experience
• We encourage you to apply even if you do not believe you meet every single qualification. Not all strong candidates will meet every single qualification as listed