Senior Software Engineer, Product

Own features from technical scoping through deployment and post-launch iteration — not just build them, but make sure they work

Design and extend schemas, APIs, and business logic to support new product capabilities

Ship high-quality product code across the stack

Incorporate real user feedback — from data, direct user contact, or your own product instincts — to improve what you've shipped

Work closely with ML researchers to turn research services to production, making them consumable for product development

Collaborate across design, product, and engineering to figure out what to build, not just how

Identify and advocate for improvements to development, testing, and deployment practices

4+ years of experience in software engineering, with a focus on product development

Experience building user-facing web applications spanning frontend, backend/API, and database — in any stack. You understand the request lifecycle across layers

Clear, concise communication — you explain technical decisions well, distinguish your work from the team's, and proactively share context

Evidence of shipping and iterating — you can describe the full arc of a feature you owned: problem, solution, code, what happened after launch, and what you'd change now

A product engineering identity — you care about whether the thing you built actually worked for users, not just whether the code was clean

Genuine curiosity about AI evaluation and Arena's mission — you've looked at the product and can articulate why this domain matters to you

Familiarity with our stack: NextJS, React, TypeScript, Tailwind, ShadCN, HonoJS, Postgres, Vitest

Experience with Supabase or Vercel's AI SDK

You've shipped without PM or design support — determined what to build by talking to users or looking at data

NextJS

React + TypeScript

Tailwind + ShadCN

HonoJS

Postgres

Vitest