Jobs in the United States

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Added 1 min ago
Senior Tech Delivery Lead Open Text
Sysco Payroll, Division of Sysco Resources Services, LLC
United States
May sometimes provide hands-on assistance with exceptionally complex technical solutions, operating as a senior engineer
Added 1 min ago
Quality Principal Engineer II
Zimmer, Inc.
United States
Responsible for gathering relevant, factual information and data in order to solve quality related problems. Resolve issues by identifying and applying solutions from acquired technical…
Added 1 min ago
Lead Software Development Engineer in Test (SDET)
TCC Toyota Motor Credit Corporation Company
Plano, TX
We are seeking a Lead Software Development Engineer in Test (SDET) to join our team as an individual contributor. In this role, you will design, build, and maintain scalable test automation…
Added 2 mins ago
T
QC Lab Technician
TEKNOVA
Hollister, CA
- $25 USD / hour
…novel products that help our customers get reliable results, engineer formats that fit their systems, and find ways to ship out their orders one day sooner. Every time we help our customers…
Added 2 mins ago
Applications Engineer II
Fenner Precision Polymers
Lititz, PA
Be a technical resource for Product Management providing product information, market insight, customer data and support for day to day PM function
Added 2 mins ago
Sr. Presales Networking Systems Engineer (Long Island, NY)
Hewlett Packard Enterprise
All, NY · Long Island City, NY
…help companies connect, protect, analyze, and act on their data and applications wherever they live, from edge to cloud, so they can turn insights into outcomes at the speed required to…
Added 2 mins ago
Signal Integrity Engineer III
Hewlett Packard Enterprise
Roseville, CA
…help companies connect, protect, analyze, and act on their data and applications wherever they live, from edge to cloud, so they can turn insights into outcomes at the speed required to…
Added 2 mins ago
Power Engineer II
Hewlett Packard Enterprise
Sunnyvale, CA
…help companies connect, protect, analyze, and act on their data and applications wherever they live, from edge to cloud, so they can turn insights into outcomes at the speed required to…
Added 2 mins ago
HPE Labs - Principal Research Engineer - HPE Quantum
Hewlett Packard Enterprise
Milpitas, CA
…help companies connect, protect, analyze, and act on their data and applications wherever they live, from edge to cloud, so they can turn insights into outcomes at the speed required to…
Added 2 mins ago
Shaft Technician
Cementation USA
Elko, NV
Provides data to the Shaft Engineer or Technical Services Manager to generate reports of shaft advance and coordinates supplies and quality control of shaft sinking supplies.
Added 2 mins ago
Sr. HVAC Engineer
Bechtel
Knoxville, TN
In this position, the engineer will support design development of HVAC and mechanical systems by preparing studies, mechanical drawings, calculations, material requisitions, engineering…
Added 3 mins ago
Technical Services Engineer
National Electrical Engineering Consultants LLC
Pembroke Pines, FL
The Technical Services Engineer is the technical backbone of BESS Technical Services, applying NEEC's technical expertise to each customer's project. The role builds the technical side of…
Added 3 mins ago
Senior Specialist, Mechanical Engineer (Mechanisms)
L3Harris Technologies
Carlsbad, CA · Chantilly, VA · Palm Bay, FL
Job Title: Sr. Specialist, Mechanical Engineer (Mechanisms)
Added 3 mins ago
Lead, Technical Support Engineer (S1000D)
L3Harris Technologies
Greenville, TX
Job Title: Lead, Technical Support Engineer (S1000D Structured Data Project Lead)
Added 4 mins ago
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Staff Backend Engineer - Performance - US
Teleport
Remote, United States
- $222,000 to $342,000 USD / year
Added 5 mins 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 5 mins ago
P2 SRE and Platform Engineer - Sana Search (US Federal)
Workday, Inc.
CA
…standalone-ready, hybrid-by-design service that orchestrates enterprise data at scale. From federated gateways to agentic text retrieval pipelines and open personalization frameworks, we…
Added 5 mins ago
System Administrator I – 1 Year Position
Deseret Mutual Benefit Administrators
Salt Lake City, UT
…Endpoint Administrator Associate, Microsoft Certified Systems Engineer (MCSE), Microsoft Certified Solutions Expert [MCSE: Productivity], Microsoft Certified Solutions Expert [MCSE: Core…
Added 5 mins ago
Organic Chemist
BNH
Arnold AFB, TN
…Arnold Engineering Development Complex at Arnold AFB, TN. This engineer will be working as a member of an integrated team responsible for maintaining and sustaining the United States Air…
Added 5 mins ago
ID&C Enterprise Project Engineer
BNH
Arnold AFB, TN
Beyond New Horizons, LLC (BNH) has an exciting opportunity for an ID&C Enterprise Project Engineer, supporting Test Operations and Sustainment II (TOS II) at Arnold Air Force Base,…
Added 6 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 6 mins ago
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Machine Design Engineer
Jobot
Culver City, CA
- $100,000 to $130,000 USD / year
Machine Design Engineer | Plastic Injection Molding Industry | $100,000 - $130,000+ | Culver City, CA
Added 6 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 6 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 6 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…

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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