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Senior Materials and Process Engineer
Infleqtion
Louisville, CO
- $130,000 to $170,000 USD / year
We are seeking a Senior Materials and Process Engineer to own materials and manufacturing process development for the Quantum Gravity Gradiometer (QGG) program. This hands-on role turns…
Added 5 mins ago
Fabrication Wet Etch Engineer, Quantum AI
Google
Goleta, CA
As a Hardware Engineer on the Quantum AI Fabrication team in Goleta, California, you will develop, optimize, and scale cleanroom wet chemical and solvent processes used to build…
Added 10 mins ago
Systems Engineer
HPE
All, MN
Create detailed design and implementation specifications for complex products/applications/solutions.
Added 10 mins ago
Mechanical Design Engineer
HPE
Roseville, CA
HPE Networking is seeking a motivated Mechanical Design Engineer to help develop the next generation of high-performance networking hardware. This role focuses on the mechanical design,…
Added 10 mins ago
Lead, Software Engineer - Backend /Integration - TS/SCI
L3Harris Technologies
Patrick Air Force Base, FL
We are seeking a TS/SCI-cleared, highly skilled and motivated Lead Software/Integration Engineer with experience in modern backend development, Java, AWS, Docker, Linux, CI/CD, and…
Added 15 mins ago
Sr. Model Engineer
SpaceXAI
Palo Alto, CA
…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…
Added 15 mins ago
Software Engineer, Services Platform
SpaceXAI
San Francisco, CA · New York, NY
…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…
Added 15 mins ago
Software Engineer, Research Tooling
SpaceXAI
Palo Alto, CA
As a Software Engineer on the Research Tools team, you'll build the infrastructure and applications that enable our researchers to iterate quickly, run complex experiments, and extract…
Added 15 mins ago
Software Engineer, Enterprise Platform
SpaceXAI
San Francisco, CA
We're hiring an Enterprise Platform Engineer to build the foundational systems that make Cursor ready for the world's largest engineering organizations. Today we have basic organizations,…
Added 15 mins ago
Software Engineer, Infrastructure
SpaceXAI
San Francisco, CA · New York, NY
…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…
Added 15 mins ago
Software Engineer, Storage
SpaceXAI
San Francisco, CA · New York, NY
As a Software Engineer on the Storage team at SpaceXSI, you'll own the data layer that underpins every product surface: the databases, caches, and the strategy for how teams provision,…
Added 15 mins ago
Software Engineer, Pretraining Data
SpaceXAI
Palo Alto, CA
…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…
Added 15 mins ago
Software Engineer, New Grad 2027
SpaceXAI
San Francisco, CA · New York, NY · Palo Alto, CA
…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…
Added 15 mins ago
Software Engineer, Model Routing & Inference
SpaceXAI
New York, NY · San Francisco, CA
…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…
Added 15 mins ago
Sr. Software Engineer, ML Platform
SpaceXAI
Palo Alto, CA
…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…
Added 15 mins ago
Software Engineer, Enterprise
SpaceXAI
San Francisco, CA · New York, NY
…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…
Added 15 mins ago
Software Engineer, Developer Productivity
SpaceXAI
San Francisco, CA · New York, NY
…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…
Added 22 mins ago
District Engineer
Department of Transportation
Mecklenburg County, NC
Experience in reviewing project plans and specifications for locally managed projects, subdivisions, right of way encroachments and driveway permit applications for compliance with all…
Added 25 mins ago
Mechanical Engineer II (Product Improvement Engineering)
Life Fitness, LLC
Ramsey, MN
Are you a Mechanical Engineer, passionate about fitness, and looking to gain hands-on experience and grow your skills? Life Fitness / Hammer Strength is looking for a Mechanical Engineer II…
Added 25 mins ago
Embedded Systems Engineer - ATL / Eagan MN
Lockheed Martin
Eagan, MN
This role involves software, firmware, gateware, and/or hardware design to support the development of radio-frequency (RF), photonic, and/or advanced computing systems. Your key…
Added 26 mins ago
Senior Cloud Engineer
Eide Bailly
Minneapolis, MN
The Cloud Senior Engineer is responsible for supporting complex engineering initiatives across the Microsoft cloud environment, with a primary focus on Microsoft Dynamics 365 CRM, the Power…
Added 26 mins ago
Senior Cloud Engineer
Eide Bailly
Minneapolis, MN
The Cloud Senior Engineer is responsible for supporting complex engineering initiatives across the Microsoft cloud environment, with a primary focus on Microsoft Dynamics 365 CRM, the Power…
Added 31 mins ago
SI
Principal Platform Solution Engineer
Salesforce, Inc.
Remote, United States
- $173,460 to $255,150 USD / year
…Specialist team. In this role, you’ll bring deep technical expertise and strategic insight to help customers securely harness the full power of the Salesforce Platform. You’ll work closely…
Added 31 mins ago
Sr. Staff Physical Design Engineer
Advanced Micro Devices, Inc
Austin, TX
Join an experienced physical design team working on AMD graphics IP for next-generation AI data center chips. In this role, you will own and drive complex physical design work for…
Added 31 mins ago
Devops Platform Engineer
Advanced Micro Devices, Inc
San Jose, CA
We are seeking a hands-on Platform Engineer to build and operate the infrastructure foundations that enable engineering teams to deliver reliable, scalable, and secure products. This role…

SpaceXAI

Software Engineer, Pretraining Data

Palo Alto, CA, United States

$160,000 - $250,000 USD

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Job details

Pay: $160,000 - $250,000 USD
Experience: Minimum of 3 years of software engineering experience
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.

SOFTWARE ENGINEER, PRETRAINING DATA

We're looking for Software Engineers to build the data systems behind our frontier models' initial training. You'll work on large-scale crawling, data platform, and pipeline infrastructure, turning raw dumps into the datasets our models train on, and making iteration with researchers fast and reliable.

RESPONSIBILITIES:

Data Platform:

Build the platform that turns raw web, code, multimodal, and acquired data into training-ready datasets for frontier pretraining runs
Own the pipelines, orchestration, and tooling that make pretraining data iteration fast, reliable, observable, and reproducible at scale
Create clear signals for data quality, lineage, freshness, and pipeline health so researchers can trust what goes into each run
Partner with initial training, crawling, data quality, and acquisition teams to turn new data ideas into measurable improvements in loss, evals, and model capability

Data Quality:

Build and own high-throughput, fully telemetered data pipelines that process frontier-scale data with end-to-end traceability. If something breaks or drifts, your systems will tell us before the training run does
Train and ship models that classify, rank, filter, clean, and identify data at extreme throughput. These models have to be both accurate and fast enough to sit in the critical path without becoming the bottleneck
Design and run scaling-ladder experiments on data-mixture, repeatability, and quality depth that turn "this dataset feels good" into hard evidence the training team can trust
Partner tightly with Data Acquisition to hunt down missing or low-quality sources, and with the training teams to close the loop on what actually moves loss and downstream evals
Treat data quality as a systems problem and a research problem. You will write performance-critical code one week and design careful experiments the next

Crawling:

Build and scale the web crawling systems that discover, schedule, fetch, and parse high-quality documents across the open web for initial training
Improve URL seeding, scoring, and fair host scheduling so crawl capacity lands on the hosts and pages that matter most for model quality
Raise crawl success and parsing quality, defeating antibot failures, improving extractors, and capturing content we previously could not get cleanly
Debug and harden complex crawl infrastructure end-to-end for availability, recovery, and ingestion lag, and automate delivery of crawl datasets into the data pipeline
Work independently (and alongside AI agents) and partner with Data Quality and Data Platform so new coverage shows up as better tokens in training runs

BASIC QUALIFICATIONS:

Minimum of 3 years of software engineering experience
Software engineering experience building distributed systems and/or large-scale data infrastructure

PREFERRED SKILLS AND EXPERIENCE:

High-slope engineer who has moved unusually fast (e.g., staff-level ownership within a few years) or brings relevant domain experience
Able to architect and ship end-to-end with high ownership, debug complex systems independently, and work alongside AI agents
Strong intuitions about large-scale distributed systems
Excited to learn how pre-training data shapes model quality, and want the ownership and visibility that comes with building systems that feed frontier training runs

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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