Software Engineer, Evals

SpaceX Super Intelligence; Palo Alto (CA); On-site; USD 175,000 - 275,000; Full time

Benefits offered by this job

Equity

Medical coverage

Vision & Dental coverage

401(k)

Disability insurance

Life insurance

Employee discounts

Job summary

SpaceX Super Intelligence in Palo Alto is seeking a Software Engineer for the Evals team to own, design, build, and ship robust systems that engineers rely on every day. You will contribute to measuring model capabilities, debugging failures, and accelerating frontier research across our Grok stack.

The ideal candidate has 3+ years of coding experience, strong attention to detail, and startup exposure, with familiarity in AI/ML workflows and internal tools.

Qualifications

• 3+ years of experience actively writing code.
• Strong attention to detail and first principles reasoning.
• Startup or fast-growing early-stage startup experience.
• Familiarity with AI/ML workflows, annotation tools, or evals.
• Experience creating and maintaining component libraries, design systems, or internal tools.

Responsibilities

• Own and elevate mission-critical research platform used to measure model capabilities.
• Design, build, and ship reliable tools for engineers to use daily.
• Diagnose and improve model evaluation instruments and data pipelines.

Skills

3+ years coding

Attention to detail

Startup experience

AI/ML workflows familiarity

Design systems/internal tools

Job description

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today, SpaceX is actively developing the technologies to make this possible, with the ultimate goal of making life multiplanetary and expanding consciousness to the stars. SpaceXSI is building Super Intelligence to help humanity understand the universe. Our teams are building the full Super Intelligence stack: from our Colossus supercomputers, to Grok models, to our suite of applications, including Grok Bot, Grok Build, Grok Imagine, Grok Voice, and X. We're creating a powerful flywheel where more compute trains better models, better models power more useful products, and what we learn from people using those products shapes what we build next.

SOFTWARE ENGINEER, EVALS

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 own and elevate our mission-critical research platform that directly accelerates SpaceXSI's frontier work.

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.

BASIC QUALIFICATIONS:

• 3+ years of experience actively writing code

PREFERRED SKILLS AND EXPERIENCE:

• 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
• 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 SpaceXSI, 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.

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