Senior Software Engineer, Full Stack

LMArena

52d

About The Position

LMArena is seeking a Senior Full-Stack Product Engineer to lead the technical design and development of AI-focused products across our platform. You’ll be responsible for owning features end-to-end—from proposing technical approaches and implementing core product flows, to deploying new functionality and tracking its impact. This role is ideal for someone with proven experience building reliable business logic at scale who is excited to shape how people interact with cutting-edge AI models.

Requirements

• 5+ years of experience in software engineering, with a focus on full-stack or backend product development
• Deep knowledge in SQL and managing databases at scale
• Familiarity with testing practices and tools like Vitest (or similar testing frameworks)
• Clear communicator and strong collaborator across design, product, and engineering teams

Nice To Haves

• PowerUser Experience with Supabase or Vercel's ai sdk

Responsibilities

• Expand data structures and business logic to support new features
• Visualize feature performance and usage metrics through internal tooling and dashboards
• Own the full feature lifecycle—from technical scoping to deployment and iteration based on insights
• Identify and advocate for process improvements in development, testing, and deployment.
• Experiment with new tools and frameworks to enhance productivity and product capabilities

Benefits

• Comprehensive health and wellness benefits, including medical, dental, vision, and additional support programs.
• The opportunity to work on cutting-edge AI with a small, mission-driven team
• A culture that values transparency, trust, and community impact

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 11-50 employees