Software Engineer - Evals

Socket.dev; Palo Alto (CA); On-site; USD 175,000 - 275,000; Full time

Benefits offered by this job

401(k) retirement plan

Medical, Vision, and Dental coverage

Equity

Job summary

SpaceXAI seeks engineers to own and elevate its mission-critical research platform that directly accelerates our frontier work. You will design, build, and ship delightful, bulletproof systems that engineers love to use daily, bringing first principles thinking and careful attention to quality into every release.

We value initiative, hands-on contribution, and clear communication within a flat, fast-moving team.

Qualifications

• 3+ years of professional coding experience.
• Track record of shipping high-quality projects.
• Strong product taste with ability to translate quality into measurable criteria.
• Excellent attention to detail and communication.

Responsibilities

• Own and elevate the mission-critical research platform.
• Design, build, and ship robust systems used by engineers daily.
• Collaborate in a flat team with initiative and clear communication.

Skills

Software engineering

Code quality

Shipping excellence

Attention to detail

Product taste

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 SpaceXAI'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 SpaceXAI, 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.

SpaceXAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.