Senior Software Engineer, Full Stack Job at Arena Intelligence, Inc. (Bay Area)

Senior Software Engineer, Full Stack

Arena Intelligence, Inc.

Location:
United States , Bay Area

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

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.

Job Responsibility:

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

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 have:

PowerUser Experience with Supabase or Vercel's ai sdk

What we offer:

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

Additional Information:

Job Posted:
February 20, 2026

Employment Type:

Fulltime

Work Type:

Hybrid work

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