Software Engineer - Evals

Pantera Capital; Palo Alto (CA); On-site; USD 175,000 - 275,000; Full time

Benefits offered by this job

Equity

Medical coverage

401(k) retirement plan

Disability insurance

Life insurance

Employee discounts

Job summary

SpaceXAI is seeking engineers to own and elevate a mission-critical research platform that accelerates frontier work in AI research. You will design, build, and ship reliable systems that engineers rely on every day, with a strong emphasis on quality, safety, and usability.

We welcome all levels, from new grads to senior engineers, and value initiative, clear communication, and a relentless focus on delivering excellence. Equity, medical coverage, and retirement benefits are part of the package.

Qualifications

• 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 - translate fuzzy notions of quality, helpfulness, truthfulness, and safety into concrete criteria.
• Strong attention to detail.

Responsibilities

• Own and elevate SpaceXAI's mission-critical research platform.
• Design, build, and ship delightful and bulletproof systems used daily by engineers.
• Collaborate across teams to measure model capabilities and drive improvements across training.

Skills

Software engineering

Shipping quality projects

Product taste

Attention to detail

3+ years coding

Job description

SpaceXAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company’s mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.

You will own and elevate our mission-critical research platform that directly accelerates xAI’s frontier work.

The evals team creates and executes instruments for measuring model capabilities and behaviors. These instruments are used to clean datasets, provide feedback for experiments, and track growth throughout training. The evals team also diagnoses why agents fail and how to make improvements both short and long term. We manage the execution infrastructure, design data sets and grading schemes.

You will design, build, and ship delightful and bulletproof systems that engineers love to use every day. This role values a strong attention to details, first principles reasoning, and great taste.

We are open to all levels from new grads to senior engineers.

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.

Bonus Points

• 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 is just one part of our total rewards package at xAI, which also includes 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.

• 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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