# Software Engineer

**Company:** [xAI](https://hotfix.jobs/companies/xai)
**Location:** Palo Alto, CA
**Role:** ML Engineering
**Salary:** $175k – $275k/yr
**Experience:** 3+ years
**Skills:** Software Engineering, ai/ml workflows, annotation tools, evals, component libraries, Design Systems, internal tools
**Posted:** 2026-07-22

> Build and own a mission-critical research platform for evaluating AI model capabilities and behaviors at xAI. Design instruments, datasets, grading schemes, and infrastructure to measure, diagnose, and improve models while shipping delightful internal tools.

## Job Description

## Responsibilities
- Own and elevate our mission-critical research platform that directly accelerates xAI’s frontier work.
- Design, build, and ship delightful and bulletproof systems that engineers love to use every day.
- Create and execute instruments for measuring model capabilities and behaviors.
- Use instruments to clean datasets, provide feedback for experiments, and track growth throughout training.
- Diagnose why agents fail and how to make improvements both short and long term.
- Manage the execution infrastructure, design data sets and grading schemes.

## Requirements
- Software engineering proficiency and 3+ years of experience actively writing code.
- A track record of shipping high quality projects and a strong sense of urgency.
- Exceptional product taste - you have a sharp sense for what “good” looks like in outputs, and you can translate fuzzy notions of quality, helpfulness, truthfulness, and safety into concrete, measurable criteria.
- Strong attention to detail.

## Nice-to-Haves
- Previously founded a startup or joined a fast-growing early-stage startup.
- Familiarity with AI/ML workflows, annotation tools, or evals.
- Experience creating and maintaining component libraries, design systems, or internal tools.

## Compensation and Benefits
- $175,000 - $275,000 USD base salary.
- Equity, comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short & long-term disability insurance, life insurance, and various other discounts and perks.

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