~7mo ago
$180,000 - $440,000 USD/yr

Model Engineer, Mid-training

United StatesUnited States·Palo Altolead
OtherSoftware EngineerMember Of Technical StaffSoftware Engineering
5 views0 saves0 applied

Quick Summary

Overview

ABOUT xAI xAI’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.

Technical Tools
docker

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.

Responsibilities

~1 min read
  • →Scale synthetic coding data to trillions of tokens with large-scale docker verification
  • →Distill the intelligence of flagship models into flash models through synthetic data generation
  • →Optimize mid-training data mixtures to boost the ceiling for RL
  • →Engineer long-context data recipes
  • →Develop robust and diverse evaluation for mid-training checkpoints

Requirements

~1 min read
  • Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++
  • Familiarity across all kinds of scaling laws
  • Strong ability to design ML experiments
  • Familiarity with state-of-the-art techniques for curating AI training data for text, image, audio, and video modalities
  • Strong engineering abilities in large-scale data processing frameworks
  • Experience with ML and large model scaling
  • Experience with Spark, Ray, and other large-scale data processing frameworks

What We Offer

~1 min read

$180,000 - $440,000 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.

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

Location & Eligibility

Where is the job
Palo Alto, United States
On-site at the office
Who can apply
US
Listed under
United States

About this job

Pay per year
$180,000–$440,000 a year
356% above the $68,006 median for Other jobs on Jobera (131,969 salaries).
Who can apply
United States
Posted
218 days ago
Employer
has 309 open jobs on Jobera in 7 countries.

Listing Details

First seen
March 26, 2026
Last seen
October 31, 2026

Posting Health

Days active
218
Repost count
0
Trust Level
42%
Scored at
October 31, 2026

Signal breakdown

freshnesssource trustcontent trustemployer trust

Driven by artificial intelligence and human empathy.

View company profile
Newsletter

Stay ahead of the market

Get the latest job openings, salary trends, and hiring insights delivered to your inbox every week.

A
B
C
D
Join 12,000+ marketers

No spam. Unsubscribe at any time.

Model Engineer, Mid-training$180,000 - $440,000 USD