Arena
Software Engineer - Full Stack
SF Bay Area · On-site · Full-time · Posted Sep 16, 2026
- Experience
- 3+ years in software engineering, focused on enterprise or developer-facing product development.
About the job
Own and ship full-stack features for Arena’s AI evaluation platform, from scoping and implementation through deployment, measuring impact, and iteration.
What you'll do
- Design and extend schemas, APIs, and business logic, and deliver product code across the stack.
- Use user feedback and product data to improve shipped features; collaborate with design, product, engineering, and ML researchers to bring research services into production.
- Identify improvements to development, testing, and deployment practices.
What they ask for
- Experience building user-facing web applications across frontend, backend/API, and database layers.
- Clear, concise communication and evidence of owning, shipping, and iterating on features.
- Product-focused approach to evaluating whether software works for users.
- Genuine interest in AI evaluation and Arena’s mission.
Nice to have
- Familiarity with NextJS, React, TypeScript, Tailwind, ShadCN, HonoJS, Postgres, or Vitest.
- Experience with Supabase or Vercel's AI SDK; experience determining product direction through user conversations or data.
Tools
NextJS, React, TypeScript, Tailwind, ShadCN, HonoJS, Postgres, Vitest
AI focus
Bring ML research services into production and build features for a platform that evaluates AI models in real-world workflows.
Model-written summary · the original posting is authoritative