Senior Infrastructure Engineer

LMArena is seeking a Senior Infrastructure Engineer to define, build, and evolve the technical foundations that power the world’s most transparent AI evaluation platform.

Requirements

• 8+ years of experience in backend, infrastructure, or systems engineering, including staff-level scope in a high-scale production environment.
• Proven experience designing and operating distributed systems at scale (millions of DAU / billions of requests).
• Deep knowledge of networking fundamentals, service-to-service communication, and traffic routing at scale.
• Hands-on experience with performance profiling, observability, and reliability engineering.
• Track record of collaborating with security and product engineering to deliver both foundational systems and user-facing features.
• Clear communicator who can lead technical discussions, build alignment across teams, and partner with us to prioritize the needs of the business.

Benefits

• Competitive salary
• Opportunities for professional growth and development
• Collaborative and dynamic work environment