Arena

Recruitment

• Own end-to-end interview coordination across complex, multi-stage pipelines, including technical challenges, research panels, founder/executive interviews, and debriefs
• Serve as the primary, high-touch liaison for candidates and deliver a seamless, transparent, memorable interview experience
• Partner directly with founders and executive leadership to optimize hiring bandwidth and protect calendars
• Hold hiring teams accountable to rapid feedback loops
• Help design, automate, and scale the talent technology stack, including ATS workflows, scheduling automation, candidate communications, and pipeline analytics
• Resolve scheduling conflicts and urgent priorities in real time
• Maintain data integrity across recruiting systems
• Track pipeline metrics such as conversion rates, time-to-schedule, and candidate velocity to identify bottlenecks

Recruiting Coordinator – Founding Talent Operations

Platform Engineer

• Design and implement low-latency, high-reliability APIs for leaderboards, models, and arenas
• Handle SSE and streaming responses across heterogeneous model providers
• Implement partial failure recovery, mid-stream fallback, and consistent response normalization
• Build enterprise-grade infrastructure including rate limiting, authentication, usage metering, cost attribution, audit logging, and SOC 2 compliance capabilities
• Instrument infrastructure with distributed tracing, latency breakdowns, token-level usage tracking, and real-time dashboards
• Integrate with the core evaluation platform, Arena data, and customer-specific benchmarks
• Collaborate with the research team to turn novel ideas into full-featured products
• Contribute to the backend of the Leaderboards and Evals platforms
• Help unify public and private data architectures
• Work closely with researchers, engineers, and product leadership as an early infrastructure-team member
• Operate as a hands-on individual contributor building foundational infrastructure for online AI evaluation systems

Software Engineer, Platform

Designer

• Lead the end-to-end design process of new features and products
• Prototype new ideas, write proposals and specifications, and work with engineering on scope and implementation
• Track feedback and data and iterate post-launch
• Deeply understand the High Expectation Customer, their preferences, and product usage
• Understand business goals and user needs and identify ways to improve the experience and grow the business
• Monitor user feedback and analytics, spot trends, and prioritize work to improve the product
• Help develop and expand the design system for consistency and quality across product surfaces
• Influence design-team culture and processes and drive product vision
• Partner closely with engineering, product, and research to explore, prototype, iterate, test, and ship products and features

Design Staff Member, Product

Full-stack Engineer

• Own features from technical scoping through deployment and post-launch iteration
• Design and extend schemas, APIs, and business logic for new product capabilities
• Ship high-quality product code across the stack
• Incorporate user feedback from data, direct user contact, and product instincts
• Work with ML researchers to turn research services into production capabilities
• Collaborate with design, product, and engineering on product decisions
• Identify and advocate for improvements to development, testing, and deployment practices

Recruiting Coordinator – Founding Talent Operations

Software Engineer, Platform

Design Staff Member, Product

Software Engineer, Full Stack