Jobs in the United States

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Added 1 min ago
Forward Deployed Engineer
Safe Security
Remote, United States
As a Forward Deployed Engineer, you are the implementation owner of a customer’s success with SAFE, from the first onboarding call to a working, trusted deployment delivering value as a key…
Added 6 mins ago
Senior API & Integration Engineer
Vast Bank
Remote, United States
Vast Bank is looking to hire an Senior API & Integration Engineer!
Added 9 mins ago
TT
Product Engineer, Scraping
True Talent Solutions Partners
San Francisco, CA
- $235,000 to $260,000 USD / year
Added 11 mins ago
Software Engineer, Bugbot
SpaceXAI
New York, NY · San Francisco, CA
We're hiring a Software Engineer to work on Bugbot. Bugbot reviews pull requests, catches bugs, suggests improvements, and is becoming a critical part of how engineering teams ship…
Added 11 mins ago
Engineering Manager, Agent & Product Security
SpaceXAI
New York, NY · Palo Alto, CA
- Engineer the isolation that makes Cursor safe to run inside customers' most valuable codebases: tenancy, workspace, secret, and data protections designed for real adversaries
Added 11 mins ago
Model Engineer
SpaceXAI
Palo Alto, CA
- An excellent programmer and software engineer, comfortable working across the research stack in Python and PyTorch or JAX
Added 11 mins ago
Software Engineer, Compute Infra
SpaceXAI
San Francisco, CA · New York, NY
As a Software Engineer on Compute Infra at SpaceXSI, you'll build the sandbox infrastructure that gives every agent its own VM. These VMs power coding agents, Grok Bot, reinforcement…
Added 11 mins ago
Software Engineer, Client Infrastructure
SpaceXAI
San Francisco, CA
As an Engineer on the Client Infrastructure team at SpaceXSI, you'll design and build the systems that make our desktop experience performant and stable for millions of developers. You'll…
Added 11 mins ago
Software Engineer, Billing
SpaceXAI
San Francisco, CA · New York, NY
We're hiring a Software Engineer, Billing to evolve the systems that power how Cursor charges and reconciles revenue across millions of developers and enterprise teams. You will work across…
Added 11 mins ago
IG
Building Engineer
Impec Group
Pleasanton, CA
- $40 to $50 USD / hour
Our client is seeking an experienced, hands-on Building Engineer to support the safe, efficient, and reliable operation of its corporate facilities. This position will lead maintenance…
Added 11 mins ago
ASIC Design Engineer, Cloud TPU
Google
Sunnyvale, CA
As an RTL Design Engineer on the TPU team, you will be a key contributor to the development of Google's AI accelerators. You will leverage your expertise in digital logic design, computer…
Added 11 mins ago
Staff Software Engineer, AI/ML, Cloud IAM, Dataset and Model Training
Google
Sunnyvale, CA
…mobile; the list goes on and is growing every day. As a software engineer, you will work on a specific project critical to Google’s needs with opportunities to switch teams and projects as…
Added 14 mins ago
EG
Front End React Engineer
Eliassen Group
Dover, DE
- $80 to $90 USD / hour
Our client seeks an experienced Front End React Engineer to join a small, focused team building features across three SaaS products in consumer goods retail. Global brands and retailers…
Added 15 mins ago
Boomi Integration Engineer - Local to Pittsburgh, PA
CGI
Pittsburgh, PA
Build and support reliable enterprise integrations using Boomi. This mid to senior level Integration Engineer will design, develop, deploy, and support integration processes across business…
Added 15 mins ago
Senior Test Automation Engineer - Local to Pittsburgh, PA
CGI
Pittsburgh, PA
We are seeking an experienced Senior Test Automation Engineer with 8+ years of experience in software quality engineering, test automation, and enterprise application testing. The ideal…
Added 15 mins ago
Sr Fullstack Developer
CGI
Pittsburgh, PA
This role is ideal for an engineer who enjoys building software as much as leading technical direction.
Added 15 mins ago
OT Security Engineer
CGI
Pittsburgh, PA
CGI is looking for operational Technology (OT) security engineer for a fulltime position in New Orleans.
Added 15 mins ago
Software Engineer in Test
CGI
Cary, NC
We CGI is seeking an experienced Software Engineer in Test and Automation to help teams build and deliver reliable, scalable applications. In this role, you will design reusable testing…
Added 15 mins ago
DataStage Engineer
CGI
Salt Lake City, UT
CGI is seeking an experienced DataStage Engineer to join our team in Salt Lake City, UT. In this role, you’ll help build and support enterprise data platforms that enable organizations to…
Added 18 mins ago
Sr Engineering Manager
MED Medtronic Inc
Tempe, AZ
…standing as the world’s top medical device company. Help us engineer the extraordinary! Do meaningful work, make a difference, and improve lives - starting with your…
Added 18 mins ago
Professional Engineer
Department of Environmental Quality
Helena, MT
We are looking for a Professional Engineer to join our team in the Public Water Supply and Subdivision programs of DEQ. Professional Engineers are responsible for performing professional…
Added 25 mins ago
SA
Incoming Quality Inspector - Mechanical and Machined Parts (R6590)
Shield AI
Seattle, WA
- $33 to $50 USD / hour
Coordinate with Supply Chain and Supplier Quality Engineer resolve discrepancies.
Added 25 mins ago
Incoming Quality Inspector - Composites (R6591)
Shield AI
Seattle, WA
Coordinate with Supply Chain and Supplier Quality Engineer resolve discrepancies.
Added 26 mins ago
Senior Data Engineer - MongoDB and PostgreSQL
CVS Health
Remote, United States
Senior Data Engineer will design, build, and support a near real-time transactional cache platform that enables APIs, digital experiences, and downstream services to consume operational…
Added 26 mins ago
US
Computer Systems Analyst Consultant
Universal System Technologies, Inc
Bingham Farms, MI
- $90,000 USD / year
…Bachelor's in Technology or equivalent; 24 mos. exp. as Software Engineer, Developer or CSAC. Must have exp. in Java, Spring, Spring Boot, Microservices, REST & GraphQL APIs, AWS (EC2,…

SpaceXAI

Model Engineer

Palo Alto, CA, United States

$160,000 - $250,000 USD

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Job details

Pay: $160,000 - $250,000 USD
Posting language: English
Posted: Nov 9, 2026

Original 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.

Model Engineer

SpaceXSI is building Super Intelligence to help humanity understand the universe. We train frontier coding agents and scale RL on real user data to make them increasingly effective. We're looking for Research Scientists who can drive effective RL or mid-training research in a small-team setting. You'll own ambiguous, hard research problems end-to-end: forming hypotheses, designing experiments, building the training/eval/data needed to test them, and pushing results into the next model.

RESPONSIBILITIES:

Design and run rigorous experiments that turn research ideas into measurable gains in model capability
Improve data recipes through data quality, deduplication, and mixture experiments
Define what makes RL data and rewards good, including grader design and preventing reward hacking
Advance training science, from architecture and scaling experiments to post-training recipes for coding and computer-use agents
Build evals and targeted tasks that expose model weaknesses and guide where the team invests next
Partner with engineers to take promising results from small experiments to frontier-scale training runs

BASIC QUALIFICATIONS:

Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++

PREFERRED SKILLS AND EXPERIENCE:

Able to handle ambiguous research tasks with little guidance, and to own a research direction end to end
Care an unusual amount about data quality, and can dive into the data when appropriate
Truth seeking, aiming to learn more about the science than to prove your ideas are correct
Experience with RL algorithms for language models, scaling laws, or building RL environments and evals
Experience with distributed training at scale and debugging problems that only show up at scale
Experience training frontier-scale models
Strong background in RL and machine learning fundamentals
An excellent programmer and software engineer, comfortable working across the research stack in Python and PyTorch or JAX
Hands-on experience training large models, through pretraining, post-training or RL
A track record of original work in ML, such as new methods or real improvements, shown through research, open source or production impact
MS or PhD in CS, ML, math, physics or a related field, or equivalent research experience

ADDITIONAL REQUIREMENTS:

Onsite role: must be able to work in person at the Palo Alto office

COMPENSATION AND BENEFITS:

The annual compensation range for this role is listed below.

Annual Salary:

$160,000 - $250,000 USD

Your actual level and base salary will be determined on a case-by-case basis and may vary based on the following considerations: job-related knowledge and skills, education, and experience.

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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