Jobs in the United States

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Added 5 mins ago
Sr Validation Engineer (RF, mmWave & Mixed-Signal) - TeraWave
Blue Origin Personnel, LLC
San Diego, CA · Cupertino, CA
Applications will be accepted on an ongoing basis until the requisition is closed.
Added 5 mins ago
Software Engineer II - TeraWave
Blue Origin Personnel, LLC
Cupertino, CA
Applications will be accepted on an ongoing basis until the requisition is closed.
Added 12 mins ago
CD
Building Engineer
California Dental Association
Sacramento, CA
- $74,200 to $92,700 USD / year
Highly competitive medical, dental and vision plans, including FSA and HSA account options
Added 19 mins ago
Principal Software Engineer
DriveTime
Tempe, AZ
In short, as a Principal Software Engineer, you will serve as a technical leader responsible for driving complex, business-critical initiatives across the organization. You will partner…
Added 22 mins ago
Software Development Engineer II, KMS
Amazon Development Center U.S., Inc.
Seattle, WA
…directly impacts millions of customers? As a Software Development Engineer II at Amazon, you will design, implement, and deliver features across the full software development lifecycle. You…
Added 23 mins ago
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Civil Engineer - Site Development (CE II/III, 4+ yrs, Civil 3D)
GPAC
White Lake, MI
- $80,000 to $105,000 USD / year
Our client, an established, award-winning multidisciplinary engineering and architecture firm, is hiring a Civil Engineer for site development work in Oakland County. You'll plan, design…
Added 23 mins ago
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Civil Engineer - Site Development (CE II/III, 4+ yrs, Civil 3D)
GPAC
Pontiac, MI
- $80,000 to $105,000 USD / year
Our client, an established, award-winning multidisciplinary engineering and architecture firm, is hiring a Civil Engineer for site development work in Oakland County. You'll plan, design…
Added 23 mins ago
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Civil Engineer - Site Development (CE II/III, 4+ yrs, Civil 3D)
GPAC
Auburn Hills, MI
- $80,000 to $105,000 USD / year
Our client, an established, award-winning multidisciplinary engineering and architecture firm, is hiring a Civil Engineer for site development work in Oakland County. You'll plan, design…
Added 26 mins ago
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Lead Principal Software Engineer, Core Infrastructure
Oracle
Nashville, TN
- $146,300 to $306,400 USD / year
…solver, a distributed systems generalist and/or skilled Linux engineer with Systems triage experience able to dive deep into any part of the stack and low-level systems to design broad…
Added 26 mins ago
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Lead Principal Platform Software Engineer
Oracle
Seattle, WA · Santa Clara, CA
- $113,600 to $306,400 USD / year
We are seeking a Lead Principal Platform Software Engineer to lead the architecture and delivery of critical platform systems and initiatives across teams. This is a hands-on technical…
Added 27 mins ago
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Civil Engineer - Site Development (CE II/III, 4+ yrs, Civil 3D)
GPAC
Clarkston, MI
- $80,000 to $105,000 USD / year
Our client, an established, award-winning multidisciplinary engineering and architecture firm, is hiring a Civil Engineer for site development work in Oakland County. You'll plan, design…
Added 28 mins ago
EG
Quality Assurance Engineer - PHP
Eliassen Group
Montpelier, VT
- $40 to $50 USD / hour
Our client seeks a results-driven Senior Quality Assurance Engineer to support Policyholder Portal applications. The role requires manual, automation, mobile, API, and database testing…
Added 30 mins ago
Mechatronics Engineer III
JPL/NASA
Pasadena, CA
You will be working as a Mechatronics Engineer within the Mechanical Engineering, Integration, and Test Section, which leads the design, analysis, development, integration, and test of…
Added 31 mins ago
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Entry-Level Civil Engineer - Land Development & Municipal (2+ yrs, EIT Preferred)
GPAC
Walker, MI
- $68,000 to $85,000 USD / year
…West Michigan office and is looking for an early-career Civil Engineer to join its team. This is a great opportunity to build a well-rounded foundation in site and infrastructure design…
Added 32 mins ago
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Entry-Level Civil Engineer - Land Development & Municipal (2+ yrs, EIT Preferred)
GPAC
Kentwood, MI
- $68,000 to $85,000 USD / year
…West Michigan office and is looking for an early-career Civil Engineer to join its team. This is a great opportunity to build a well-rounded foundation in site and infrastructure design…
Added 32 mins ago
G
Entry-Level Civil Engineer - Land Development & Municipal (2+ yrs, EIT Preferred)
GPAC
Grandville, MI
- $68,000 to $85,000 USD / year
…West Michigan office and is looking for an early-career Civil Engineer to join its team. This is a great opportunity to build a well-rounded foundation in site and infrastructure design…
Added 35 mins ago
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Entry-Level Civil Engineer - Land Development & Municipal (2+ yrs, EIT Preferred)
GPAC
Jenison, MI
- $68,000 to $85,000 USD / year
…West Michigan office and is looking for an early-career Civil Engineer to join its team. This is a great opportunity to build a well-rounded foundation in site and infrastructure design…
Added 39 mins ago
Senior Test Engineer
ASRC Federal Holding Company
Egg Harbor Township, NJ
ASRC Federal Advanced Research LLC (AFAR) is seeking a Senior Test Engineer to join our Common Support Services - Weather (CSS-Wx) team that supports the Federal Aviation…
Added 39 mins ago
Senior Software Engineer (Institutional, Financing)
Coinbase
Trenton, NJ
As a Senior Software Engineer on the Financing Engineering team within the Institutional group, you'll design, build, and scale the systems that safely manage billions of dollars in loans…
Added 40 mins ago
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Entry-Level Civil Engineer - Land Development & Municipal (2+ yrs, EIT Preferred)
GPAC
Ada, MI
- $68,000 to $85,000 USD / year
…West Michigan office and is looking for an early-career Civil Engineer to join its team. This is a great opportunity to build a well-rounded foundation in site and infrastructure design…
Added 40 mins ago
G
Entry-Level Civil Engineer - Land Development & Municipal (2+ yrs, EIT Preferred)
GPAC
Byron Center, MI
- $68,000 to $85,000 USD / year
…West Michigan office and is looking for an early-career Civil Engineer to join its team. This is a great opportunity to build a well-rounded foundation in site and infrastructure design…
Added 40 mins ago
Sr. Antenna Production Engineer
Echodyne Corp
Kirkland, WA
Echodyne offers the world’s first compact solid-state true beam-steering radar for a wide range of industries and applications. Our high-performance radars work in all weather and are…
Added 42 mins ago
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Project Engineer (EIT or PE) - Land Development
GPAC
Ann Arbor, MI
- $75,000 to $105,000 USD / year
Prepare site plans, construction documents, and permit applications
Added 42 mins ago
G
Entry-Level Civil Engineer - Land Development & Municipal (2+ yrs, EIT Preferred)
GPAC
Rockford, MI
- $68,000 to $85,000 USD / year
…West Michigan office and is looking for an early-career Civil Engineer to join its team. This is a great opportunity to build a well-rounded foundation in site and infrastructure design…
Added 43 mins ago
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Land Development Engineer, PE
GPAC
Flint, MI
- $90,000 to $125,000 USD / year
…communities across Michigan, is seeking a Land Development Engineer to support commercial, residential, and public site development…

SpaceXSI

Sr. Software Engineer, Kernels/CUDA (C++)

Palo Alto, CA, United States

$220,000 - $357,000 USD

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Job details

Pay: $220,000 - $357,000 USD
Experience: 5+ years of experience with low-level system programming in C/C++
Posting language: English
Posted: Nov 5, 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.

SR. SOFTWARE ENGINEER, KERNELS/CUDA (C++)

We are building one of the world’s largest AI supercomputers from the ground up. As part of the Compute Infrastructure team, you will own both the raw GPU supercomputer and the platform layer that runs on top of it. You will work across the full stack - from low-level GPU kernel optimizations and Linux kernel internals to massive-scale orchestration and virtualization - to make training and inference at SpaceXSI as fast, reliable, and scalable as possible. This is a broad, high-impact role that combines hardcore supercompute and compute infrastructure work. Your contributions will directly accelerate Grok’s training speed and overall AI progress.

RESPONSIBILITIES:

Design, build, and optimize massive GPU clusters for extreme-scale training and inference workloads
Develop and tune low-level CUDA kernels (GeMM, Attention, etc.), using CUTLASS, Tensor Cores, and Nsight for maximum performance
Profile, debug, and eliminate bottlenecks across GPU memory hierarchy, networking fabric, filesystems, and multi-GPU operation
Collaborate closely with AI research teams to deliver production-grade performance and scalability

BASIC QUALIFICATIONS:

5+ years of experience with low-level system programming in C/C++

PREFERRED SKILLS AND EXPERIENCE:

Deep low-level systems programming (C/C++/PTX/SASS)
Strong experience with large-scale GPU clusters or distributed compute infrastructure at production scale
Hands-on work with GPU kernel optimization (CUTLASS, custom kernels, Nsight profiling)
Track record of building or running high-performance infrastructure for AI workloads (training or inference platforms)
Ability to reason from first principles and optimize for both memory-bound and compute-bound scenarios

COMPENSATION AND BENEFITS:

$220,000 - $357,000 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.

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