Jobs in the United States

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Added 2 mins ago
SS
VMWare Engineer
Samsung SDS America
Plano, TX
- $156,000 to $166,000 USD / year
We are seeking a VMware Engineer to manage, maintain, and optimize enterprise virtualized environments, including VMware ESXi, vCenter, Horizon View, and end-user virtual desktop…
Added 5 mins ago
ER
Systems Architect - Manning - Information Systems Systems
El Rio Community Health Center
Tucson, AZ
- $47.06 to $77.6 USD / hour
Includes all duties of Senior technical staff (Systems Analyst, Systems Engineer, Network Technician, Network Engineer, etc.), as appropriate.
Added 15 mins ago
AW
IT Infrastructure Engineer II
ANDREW WOMMACK MINISTRIES INC
Woodland Park, CO
- $6,500 to $7,501 USD / month
The IT Operations Engineer II supports the planning, engineering, deployment, and maintenance of secure, scalable, and reliable technology solutions across multiple departments and…
Added 20 mins ago
Senior Infrastructure Engineer, Devops
caldera
Remote, United States
We’re looking for an incredible senior engineer to help us build the future of blockchain scalability.
Added 20 mins ago
Engineer I: Aftermarket Development Program (ADP)
RTX
United States
Receive high-caliber training, mentoring & guidance from RTX leaders, current & alumni LDPs to build a strong lasting global network
Added 21 mins ago
CV
AI Software Engineer
Cosmic Ventures
Remote, United States
- $30 to $50 USD / hour
The Network: Work with an SF-based agency at the forefront of the AI wave. You will build for the biggest names in the world.
Added 24 mins ago
O
Director of Strategic Communications
OpenMined
Remote, United States
- $139,000 to $245,000 USD / year
Build a network of outside experts who can reproduce and vouch for our results, and brief them before releases.
Added 27 mins ago
Senior Systems & Infrastructure Engineer
GEM Technologies
NY · New York, NY
GEM Technologies is looking for an experienced Senior Systems & Infrastructure Engineer who enjoys solving difficult technical problems and taking ownership of them through resolution.
Added 27 mins ago
Solution Sales Engineer
Expereo
Reston, VA
We are looking for an experienced Solution Sales Engineer to work in close partnership with Product, Engineering, Marketing, and regional Sales teams to drive strategic revenue growth…
Added 28 mins ago
DS
(1119604) Lead Software Engineer - Emerging Technologies
Diversified Services Network, Inc.
Chicago, IL
- $140,000 to $145,000 USD / year
Diversified Services Network, Inc. (DSN) is seeking a full-time Lead Software Engineer – Emerging Technologies to join our team in your choice of our Chicago, IL; Peoria, IL; Irving, TX; or…
Added 28 mins ago
DS
(1119604) Lead Software Engineer - Emerging Technologies
Diversified Services Network, Inc.
Peoria, IL
- $140,000 to $145,000 USD / year
Diversified Services Network, Inc. (DSN) is seeking a full-time Lead Software Engineer – Emerging Technologies to join our team in your choice of our Chicago, IL; Peoria, IL; Irving, TX; or…
Added 28 mins ago
DS
(1119604) Lead Software Engineer - Emerging Technologies
Diversified Services Network, Inc.
Irving, TX
- $140,000 to $145,000 USD / year
Diversified Services Network, Inc. (DSN) is seeking a full-time Lead Software Engineer – Emerging Technologies to join our team in your choice of our Chicago, IL; Peoria, IL; Irving, TX; or…
Added 28 mins ago
DS
(1119604) Lead Software Engineer - Emerging Technologies
Diversified Services Network, Inc.
Broomfield, CO
- $140,000 to $145,000 USD / year
Diversified Services Network, Inc. (DSN) is seeking a full-time Lead Software Engineer – Emerging Technologies to join our team in your choice of our Chicago, IL; Peoria, IL; Irving, TX; or…
Added 28 mins ago
VT
Client Engineer
Varsity Technologies
San Francisco, CA
- $75,000 to $90,000 USD / year
Varsity, a company under Treeline, is looking for a Client Engineer to handle complex technical issues across both remote and onsite client environments. Based in the Bay area, this is a…
Added 32 mins ago
Founding Engineer
Rumor
New York City, NY
…intelligence: profile enrichment, discovery, recommendations, and network graph. We’re looking for a Senior Founding Engineer to design and own the backend systems that make this…
Added 32 mins ago
TG
Network Engineer
TJS Group Inc.
Huntsville, AL
- From $150,000 USD / year
TJS Group (TJS) seeks to engage a cleared (TS) Network Engineer who supports the FBI at their Redstone Arsenal complex in Alabama focusing on providing technical engineering support for a…
Added 33 mins ago
Senior Distributed Systems Engineer
OpenDataLabs
Remote, United States
We’re looking for a Distributed Systems Engineer to help design and build the scalable infrastructure powering data access and compute in the Vana network.
Added 34 mins ago
HPC & MLOps Engineer
C-Gen.AI
Mountain View, CA
As an HPC & MLOps Engineer, you will be a foundational member of our Data Center team - integral to the design, deployment, and maintenance of high-performance computing (HPC) and MLOps…
Added 36 mins ago
FI
IT Engineer (Denver)
FieldGuide IT
Denver, CO
- $65,000 to $80,000 USD / year
As an IT Engineer, you'll be the hands-on technical problem solver our clients count on, and the person they're relieved to see walk through their door. Your core focus is troubleshooting:…
Added 36 mins ago
Software Engineer
Love Mobile
Remote, United States
…to give back. Launched in beta in Tulsa, OK, we blend modern network services with meaningful social impact, investing a portion of every customer’s spend back into local schools, shelters,…
Added 36 mins ago
Growth & MarTech Engineer
Love Mobile
Remote, United States
…to give back. Launched in beta in Tulsa, OK, we blend modern network services with meaningful social impact, investing a portion of every customer’s spend back into local schools, shelters,…
Added 38 mins ago
Full Stack Engineer
NextAlpha (Nu Dawn)
Remote, United States
We partner with startups in San Francisco to connect them with the best talent from Europe and Asia. Our network brings together top professionals in business, design, and technology to…
Added 39 mins ago
Senior Operations Manager
Amro Fabricating Corporation
Huntington Beach, CA
As a Security Operations Engineer, you will help protect the organization's systems, identities, data, and operations through security monitoring, threat detection, investigation, and…
Added 42 mins ago
AI Engineer
The Agency Fund
Remote, United States
We combine the agility of a startup with the reach of a global network, building projects at the intersection of technology, AI, and social science. Our small, distributed team brings…
Added 43 mins ago
Founding Engineer, Agentic Systems
Champ AI
San Francisco, CA
We're looking for a Founding Engineer (Agentic Systems) to own core pieces of our agent runtime and developer/product surface area. You'll build the systems that let agents operate safely,…

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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