Jobs in the United States

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Engineer 1 - Inventory
Nordstrom Inc
Seattle, WA
…developers to take a high level of ownership throughout the software life…
Added 1 min ago
Principal Software Engineer, Agentic UX
Workday, Inc.
CA
As a Principal Software Engineer, Agentic UX in Agent Factory, you’ll help build the conversational AI experience and ambient capabilities that bring Workday’s agents to life. You are an…
Added 1 min ago
P2 SRE and Platform Engineer - Sana Search (US Federal)
Workday, Inc.
CA
…collaborating with agile teams, or championing innovation and software design, Workday offers an environment where your talents can…
Added 3 mins ago
Principal, Cybersecurity Automation - Remote
Stryker
Remote, United States
The Principal Security Automation & AI Engineer is the senior technical leader responsible for automation and AI across Cyber Defense. This role designs, builds, and operates scalable…
Added 3 mins ago
2027 Converting Associate Embedded Software Engineer - Roy UT
CORP-Corporate Office
United States
Northrop Grumman is seeking an Associate Embedded Software Engineer. This position will be located at our Defense Systems Sector in Roy, UT.
Added 3 mins ago
2027 Associate Embedded Software Engineer - Roy UT
CORP-Corporate Office
United States
Northrop Grumman is seeking an Associate Cyber Systems Engineer. This position will be located at our Defense Systems Sector in Roy, UT.
Added 3 mins ago
Systems Test Engineer (EMI) - 20647
CORP-Corporate Office
United States
Northrop Grumman Defense Systems is seeking a Electromagnetic Interference (EMI) Systems Test Engineer to join the Sentinel program in enhancing the US Space Force’s ICBM capabilities and…
Added 3 mins ago
2027 Associate Structural Engineer / Structural Engineer - Dulles VA or McLean VA
SP - Orbital Space Systems
United States
…We’ll support you with training and our shared vision of global…
Added 3 mins ago
Missile Integration Technical Lead - 20695
CORP-Corporate Office
United States
Northrop Grumman Defense Systems is seeking a Missile Integration Technical Lead - Senior Staff Systems Test Engineer to join the Sentinel program in enhancing the US Space Force’s ICBM…
Added 3 mins ago
Principal / Sr Principal Modeling Simulation Systems Engineer - 18976
CORP-Corporate Office
United States
Northrop Grumman Defense Systems is seeking a Principal / Sr Principal Modeling Simulation Engineer Systems. This opening is in Roy, UT and will support the Sentinel Program. Northrop…
Added 3 mins ago
Sentinel - Principal / Sr Principal Systems Engineer - 18977
CORP-Corporate Office
United States
Northrop Grumman Defense Systems is seeking a Principal / Sr Principal Systems Engineer. This opening is in Roy, UT and will support the Sentinel Program. Northrop Grumman supports the Air…
Added 3 mins ago
Sentinel - Nuclear Hardness Survivability Engineer - 20483*
CORP-Corporate Office
United States
Northrop Grumman Defense has an opening for a Nuclear Hardness Survivability Systems Engineer (Level 2/3) to join its Guidance Computer team in Roy, UT in support of the Sentinel Program.…
Added 3 mins ago
Principal or Sr. Principal DevOps Engineer
CORP-Corporate Office
United States
Northrop Grumman Mission Systems is looking for you to join our Software and Digital Technology Team as a Principal or Sr. Principal DevOps Engineer based out of Baltimore, MD.
Added 3 mins ago
Sentinel - Systems Engineer / Principal Systems Engineer - 20060
CORP-Corporate Office
United States
Northrop Grumman Defense has an opening for a Systems Engineer (level 2)/Principal Systems Engineer (level 3) to support a Futures Program within the Command Systems Business Unit (BU)…
Added 3 mins ago
Sr Principal Engineer Systems
CORP-Corporate Office
United States
Experience with software intensive systems utilizing multiple environments dev/test/prod environments at multiple security levels
Added 3 mins ago
CO
2027 Spring Co-op Software Engineer Intern – McClellan CA
CORP-Corporate Office
United States
- $21.5 to $48 USD / hour
Northrop Grumman Mission Systems is a trusted provider of mission-enabling solutions for global security. We have a wide portfolio of secure, affordable, integrated, and multi-domain…
Added 3 mins ago
DevOps Engineer - Level 3 or 4
CORP-Corporate Office
United States
As a DevOps Engineer – Level 3 or 4, you will plan and evolve processes and infrastructure that support rapid maturation and deployment of capabilities while sustaining a stable security…
Added 3 mins ago
System Safety Engineer Level 3
SP - Propulsion Systems
United States
Northrop Grumman’s Space Sector is seeking a System Safety Engineer – Level 3 to join our team in at our Huntsville, AL or Promontory, UT Facility.. This position is 100% onsite and cannot…
Added 3 mins ago
Senior Sales Systems Engineer (South Atlantic)
Veeam Software
Miami, FL
…scale. As the market leader in both data resilience and data security posture management, Veeam is built for the convergence of identity, data, security, and AI risk. Headquartered in…
Added 4 mins ago
IG
Lead Quality Engineer, Test Automation & AI Products
Insight Global
Louisville-Jefferson County, KY
- From $62 USD / hour
8-10+ years of software quality engineering experience, including senior or lead QA responsibility
Added 4 mins ago
IG
Principal Platform AI Engineer, Healthcare Agentic AI
Insight Global
Louisville-Jefferson County, KY
- From $86 USD / hour
Daily Responsibilities: A large healthcare organization is looking for a Principal Platform AI Engineer to lead hands-on engineering for its enterprise Healthcare Agentic AI Platform. This…
Added 4 mins ago
H
Enterprise Technology Costing Architect
HP
Spring, TX
- $174,050 to $278,450 USD / year
Ensure alignment with enterprise architecture principles, security requirements and technology standards.
Added 5 mins ago
Senior Full Stack AI Engineer (US Citizen)
Remote, United States
Serve as a senior, hands-on full-stack AI engineer, leading the design, development, and delivery of large-scale mission-critical AI systems.
Added 5 mins ago
Senior AI Software Developer & Engineer (US Citizen)
Remote, United States
Serve as a senior, hands-on full-stack AI engineer and technical authority, leading the technical strategy, design, and delivery of large-scale mission-critical AI systems supporting…
Added 5 mins ago
AI DevOps Engineer
PingWind
Rockville, MD
PingWind is seeking an AI DevOps Engineer with a strong emphasis on Artificial Intelligence and Machine Learning to join the PingWind team supporting Agency for Healthcare Research and…

SpaceXSI

Sr. Software Engineer, Network (C++)

Palo Alto, CA, United States
Seattle, WA, United States

$200,000 - $375,000 USD

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Job details

Pay: $200,000 - $375,000 USD
Experience: 5+ years of professional software development experience in lieu of a degree
Posting language: English
Posted: Nov 4, 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, NETWORK (C++)

At SpaceXSI, we design, build, and operate Colossus from the ground up. This includes the massive GPU clusters, high-speed interconnect fabric, and the software that makes it all work at unprecedented scale. Colossus powers Grok and our frontier AI models with a custom, high-performance datacenter network that delivers ultra-low latency and massive bandwidth across hundreds of thousands of GPUs.

As a Software Engineer on the Colossus Networking team, you will develop the core networking software that maximizes the performance and reliability of our datacenter fabric. Your work will directly impact training efficiency, model convergence, and the speed at which we can push the frontier of AI.

Our engineers own the full lifecycle of their software - from design and implementation to deployment, monitoring, and iteration based on real-world performance at scale. You will solve hard problems in distributed systems, high-performance networking, and real-time control of one of the largest AI supercomputers on Earth.

RESPONSIBILITIES:

Develop routing and traffic-engineering algorithms for the Colossus high-performance datacenter network
Develop highly reliable, real-time software designed to run on the switches that form the backbone of our low-latency, high-bandwidth AI training fabric
Participate in and lead architecture, design, and code reviews
Develop prototypes and run experiments to validate key design decisions at both small and full-cluster scale
Build tools for software development, deployment, data analysis, visualization, and testing across virtualized environments, hardware-in-the-loop setups, and live production clusters
Deploy reliable software updates through continuous integration and release systems with rigorous testing and monitoring

BASIC QUALIFICATIONS:

Bachelor’s degree in computer science, engineering, math, or technical discipline
5+ years of professional software development experience in lieu of a degree
Development experience in C or C++

PREFERRED SKILLS AND EXPERIENCE:

Strong professional experience writing high-performance C/C++ in production environments
Experience developing, debugging, and deploying software that runs at scale in real-world systems
Deep knowledge of networking protocols (UDP, TCP/IP, RDMA, etc.), distributed systems, and large-scale datacenter fabrics
Background in real-time systems, high-performance computing, low-latency networking, or resource-constrained environments
Creative problem-solving ability with exceptional analytical skills and strong engineering fundamentals
Excellent written and verbal communication skills
Ability to thrive in a fast-paced, dynamic environment with evolving requirements
Experience with security considerations in large-scale distributed systems

COMPENSATION AND BENEFITS:

$200,000 - $375,000 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

C++
Traffic engineering
Design prototypes
Software development
Data analysis
CI/CD
BASIC
Computer science
C
Debugging
Problem solving
Analytical skills
Communication skills

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