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Added 1 min ago
Senior Software Engineer, Platform Engineering
Columbia Sportswear Comp
Portland, OR
As a Senior Software Engineer on the Platform Engineering team, you will design, build, and support enterprise integration and platform solutions that connect critical business systems and…
Added 7 mins ago
Lead Senior Cloud Platform Engineer
Stanley Martin Homes, LLC
Reston, VA
A day in the life of a Lead Senior Cloud Platform Engineer begins with partnering with application, data, AI, and infrastructure teams to ensure cloud platforms are enabling the secure,…
Added 10 mins ago
AI Solutions Engineer
Stratolaunch
Mojave, CA
…validate system performance and advance technologies toward deployment. Our team brings together expertise in engineering, manufacturing, and flight operations to solve complex challenges…
Added 17 mins ago
Tech Consultant - Infrastructure Patch & Unix Engineer
NTT DATA Americas, Inc.
Jacksonville
We are seeking a skilled Unix Engineer with experience supporting enterprise-scale Unix/Linux environments. This role will be responsible for designing, testing, validating, and deploying…
Added 17 mins ago
Unix Engineer - Infrastructure Patch
NTT DATA Americas, Inc.
Jacksonville
We are seeking a skilled Unix Engineer with experience supporting enterprise-scale Unix/Linux environments. This role will be responsible for designing, testing, validating, and deploying…
Added 17 mins ago
Spring Migration Engineer
NTT DATA Americas, Inc.
Austin
We are currently seeking a Spring Migration Engineer to join our team in Austin, Texas (US-TX), United States (US).
Added 21 mins ago
Deployment Network Engineer 4
M.C. Dean, Inc
Springfield, VA
We are seeking a Deployment Network Engineer 4 to join our Security and Electronic Systems (SES) business Unit. As part of (SES) Strategic Business Unit you will be part of a team that…
Added 22 mins ago
Sr. Software Engineer, Linux Kernel
SpaceXSI
Seattle, WA
Manage deployment, operation, and debugging of our platform in production, including: rigorous resolution and root-causing of anomalies to ensure the system is constantly improving in…
Added 25 mins ago
CB
Senior Data Engineer
Commercial Bank of California
United States
- $135,000 to $170,000 USD / year
The Senior Data Engineer is responsible for designing, building, and operating scalable, secure data platforms that power enterprise analytics, reporting, and advanced data use cases,…
Added 30 mins ago
Applications Support Sr Analyst
Citibank, N.A.
United States
The Observability Engineer will support the organization's observability transformation initiatives by helping onboard applications to modern observability platforms and OpenTelemetry…
Added 33 mins ago
Platform Engineer (TS/SCI CI Poly)
Seamless Migration
Reston · Alexandria · Washington · Colorado Springs
Seamless Migration is seeking a career and customer-oriented Platform Engineer to join our team.
Added 35 mins ago
Recruiting Coordinator
Fortastra Corporation
Torrance, CA
…demanding mission requirements. Our work directly supports the security and resilience of the United States and its allies, and we approach that mission with urgency, innovation, and a deep…
Added 36 mins ago
Test Engineer
Koniag Government Services
Vienna, VA
Kadiak, LLC, a Koniag Government Services company, is seeking a Test Engineer with a TS security clearance to support Kadiak and our government customer in Vienna, VA.
Added 36 mins ago
Network Engineer
Koniag Government Services
Washington, DC · Arlington, VA
Strong SCCM & Ivanti – Software deployment, patch management, and endpoint security enforcement.
Added 36 mins ago
AWS Engineer
Koniag Government Services
Vienna, VA
Kadiak, LLC, a Koniag Government Services company, is seeking an AWS Engineer with a TS/SCI security clearance to support Kadiak and our government customer in Vienna, VA. This position…
Added 36 mins ago
Java/.net Modernization Engineer
Koniag Government Services
Washington, DC
Tuknik Government Services, LLC, a Koniag Government Services company, is seeking a Java/.net Modernization Engineer with a Secret security clearance to support TGS in supporting our…
Added 36 mins ago
QA Test Engineer
Koniag Government Services
Washington, DC
Tuknik Government Services, LLC, a Koniag Government Services company, is seeking a QA Test Engineer with a Secret security clearance to support TGS in supporting our government customer in…
Added 36 mins ago
Lead DevSecOps Appian Engineer
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Tuknik Government Services, LLC a Koniag Government Services company, is seeking a Lead DevSecOps Appian Engineer with a Top Secret security clearance to support TGS in supporting our…
Added 36 mins ago
Identity Federation & PKI Engineer (Hybrid)
Koniag Government Services
Washington, DC
Document system architectures, engineering designs, security controls, and deployment cookbooks to ensure standardizable configurations.
Added 36 mins ago
Senior DevOps Engineer
Koniag Government Services
Vienna, VA
Kadiak, LLC, a Koniag Government Services company, is seeking a Senior DevOps Engineer to support Kadiak and our government customer in Vienna, VA. This position requires an active…
Added 36 mins ago
DevOps Engineer
Koniag Government Services
Vienna, VA
…in Vienna, VA. This position requires an active Top-Secret security clearance. This opportunity is offering a hybrid work schedule (4 days onsite, 1 days…
Added 36 mins ago
Software Developer
Koniag Government Services
Huntsville, AL
KGS is currently seeking an accomplished Senior Full Stack Software Engineer/Developer to spearhead the engineering, enhancement, and architectural modernization of core Line of Business…
Added 36 mins ago
AWS Windows Engineer, Lead
Koniag Government Services
Vienna, VA
Kadiak, LLC, a Koniag Government Services company, is seeking an AWS Windows Engineer, Lead with a Top-Secret security clearance to support Kadiak and our government customer in Vienna, VA.…
Added 36 mins ago
SharePoint Developer
Koniag Government Services
Washington, DC
Koniag Technology Solutions, Inc a Koniag Government Services company, is seeking a Principal Cloud Security Engineer with a Secret security clearance to support KTS and our government…
Added 36 mins ago
Principal Cloud Security Engineer
Koniag Government Services
Washington, DC
Koniag Technology Solutions, Inc a Koniag Government Services company, is seeking a Principal Cloud Security Engineer with a Secret security clearance to support KTS and our government…

SpaceXSI

Sr. Software Engineer, Linux Kernel

Seattle, WA, United States

$180,000 - $330,000 USD

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Job details

Pay: $180,000 - $330,000 USD
Experience: 5+ years of hands-on systems programming experience in C or 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, LINUX KERNEL

At SpaceXSI, we design, build, and operate the largest AI supercomputers in the world, from the ground up. As a member of the Platform Core team, you will be responsible for the lowest layers of the software stack on the devices setting the pace for how fast we can push the frontier of AI. Our team’s software interfaces directly with the core hardware of the supercomputer and its network fabric. Our mission is to expose the full capability of that hardware - limited only by physics - to the rest of the stack, all while retaining the smallest, most robust footprint possible.

RESPONSIBILITIES:

Build and maintain the lean, high-reliability Linux-based operating system that underpins our supercomputer network fabric
Write (or rewrite) high-performance device drivers to extract the maximum physical capability from our network and compute hardware
Manage deployment, operation, and debugging of our platform in production, including: rigorous resolution and root-causing of anomalies to ensure the system is constantly improving in reliability and developing and constantly improving our tools for observability and configuration management
Collaborate with our hardware teams and external partners to design the next generation of supercomputer hardware – and then bring up our OS and software stack on it

BASIC QUALIFICATIONS:

5+ years of hands-on systems programming experience in C or C++

PREFERRED SKILLS AND EXPERIENCE:

Strong operating systems fundamentals (scheduling, memory management, I/O) - you must be able to articulate in extreme detail how a computer works, from the hardware all the way up to high-level applications
Understanding of computer networking, both in the host (OS stack) as well as common network devices like switches and routers
Excellent written and verbal communication skills
Deep knowledge of the Linux kernel and its networking stack - transferable experience with another production-grade kernel is okay, too!
Proficiency with debugging tools spanning kernel, network, and userspace (e.g., ftrace, perf, Wireshark/tcpdump, eBPF, gdb, and more)
Experience bringing up new hardware from scratch - you have flashed bare-metal software on a microcontroller with JTAG, or bootstrapped a Linux kernel and rootfs on new hardware
Demonstrated track record of developing and optimizing device/peripheral drivers - ideally for high-speed interfaces, or with advanced considerations like DMA and cache coherency
Understanding of major peripheral hardware interface standards (Ethernet, PCIe, I2C, SPI, etc.) - you can critically review a schematic, and debug these interfaces if needed
Experience with product security, OS/system hardening, and secure boot schemes

COMPENSATION AND BENEFITS:

$180,000 - $330,000 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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More about this job

Skills

Linux
Debugging
BASIC
C
C++
Scheduling
Communication skills
Wireshark
Tcpdump

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