Staff Software Engineer, Product

Arena
United States
Workplace: RemoteFull timeFunction: Software EngineeringExperience: 5+ yearsSkills: ["SQL","Vitest","NextJS","Tailwind","Postgres","HonoJS","Supabase","Vercel ai sdk","AI models"]

Senior Full-Stack Product Engineer to design and deliver AI-focused features end-to-end on Arena's platform. You’ll expand data structures, build business logic, deploy features, and track impact, collaborating across design, product, and engineering teams. The role involves evaluating new tools, optimizing testing, and shaping how users interact with frontier AI models using NextJS, Postgres, and Vitest.

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FursaFursa
Arena
Arena
8 months ago

Staff Software Engineer, Product

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 4 hours agoStatus: Live

Job Summary

Senior Full-Stack Product Engineer to design and deliver AI-focused features end-to-end on Arena's platform. You’ll expand data structures, build business logic, deploy features, and track impact, collaborating across design, product, and engineering teams. The role involves evaluating new tools, optimizing testing, and shaping how users interact with frontier AI models using NextJS, Postgres, and Vitest.
Location: United States
Workplace: Remote
Employment Type: Full time
Job Function: Software Engineering
Seniority: Sr. Manager level

Key Responsibilities

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

Pay and Benefits

Equity and Bonus:Equity
Perks:Health InsuranceDentalVisionEquity

Key Requirements

  • •5+ years of software engineering experience 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
  • •Bonus: PowerUser Experience with Supabase or Vercel's ai sdk
Experience:5+ yearsAISaaS
Skills:SQLVitestNextJSTailwindPostgresHonoJSSupabaseVercel ai sdkAI models
Languages:English
Tech Stack:NextJSTailwindShadCNHonoJSPostgresVitestSupabaseVercelAI

Company Brief

Arena
LMArena operates a community-driven platform for evaluating and benchmarking large language models via crowdsourced pairwise comparisons and leaderboards, used by researchers and AI labs to measure real-world model performance. ([linkedin.com](https://www.linkedin.com/company/lmarena?utm_source=openai))
Industry: Developer Tools
Company Size: Small (11 to 50 employees)
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series A
Headquarters: San Francisco, United States
Founded: 2025
WebsiteLinkedIn