# Senior Software Engineer, Product

**Company:** [Arena](https://hotfix.jobs/companies/arena)
**Location:** San Francisco, CA, California
**Role:** Fullstack Engineering
**Experience:** 4+ years
**Skills:** Next.js, React, TypeScript, Tailwind, Shadcn, Honojs, Postgres, Vitest, Supabase, Vercel Ai Sdk
**Posted:** 2026-04-20

> Senior Software Engineer owns end-to-end product features across full stack, from scoping and building to deployment and iteration based on user feedback. Collaborates with ML researchers and requires 4+ years experience in product development with web apps.

## Job Description

## Responsibilities
- Own features from technical scoping through deployment and post-launch iteration.
- 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 to improve shipped features.
- Work closely with ML researchers to turn research services to production.
- Collaborate across design, product, and engineering to determine what to build.
- Identify and advocate for improvements to development, testing, and deployment practices.

## Requirements
- 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.
- Clear, concise communication skills.
- Evidence of shipping and iterating on owned features.
- Product engineering identity with focus on user impact.
- Genuine curiosity about AI evaluation and Arena's mission.

## Nice-to-Haves
- Familiarity with stack: NextJS, React, TypeScript, Tailwind, ShadCN, HonoJS, Postgres, Vitest.
- Experience with Supabase or Vercel's AI SDK.
- Shipped products without PM or design support.

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**Canonical:** https://hotfix.jobs/jobs/e34c412a-8f08-46a6-95da-a947a2a3b0b1