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Senior Software Engineer - Lab Automation
Genentech
South San Francisco, CA
As a Senior Software Engineer – Lab Automation, you will be the essential bridge connecting software architecture, frontier AI models, and real-world physical instrumentation. You will…
Added 7 mins ago
Systems Engineer Sr Principal
SAIC
Aurora, CO
Support development organization with the integration of network hardware, software, cybersecurity upgrades and recap efforts for networks and systems operating at various classification…
Added 7 mins ago
Space Vehicle Production Engineer
SAIC
Chantilly, VA
This position is for a Space Vehicle Production Engineer in Chantilly, VA supporting cutting-edge and innovative space programs. The Space Vehicle Production Engineer will work daily…
Added 10 mins ago
PD
Systems Engineer 4
PDS Defense
El Segundo, CA
- $94 to $99 USD / hour
PDS Defense, Inc. is seeking a Systems Engineer 4, in El Segundo, CA. Job ID#225406
Added 11 mins ago
Lead GNC Engineer – Flight Simulation
Mavensoft Technologies, LLC.
Chandler, AZ
…(6‐DOF) simulations, defining performance metrics, integrating hardware and software components, and conducting rigorous performance assessments and trade…
Added 11 mins ago
GNC Engineer - Modeling, Simulation
Mavensoft Technologies, LLC.
Chandler, AZ
…metrics, designing and implementing solutions, and integrating hardware and software components to help ensure system reliability and mission…
Added 15 mins ago
HA
Test Engineer
Hadrian Automation
Torrance, CA
- $135,000 to $220,000 USD / year
Hadrian is building autonomous factories to reindustrialize America. By combining AI, advanced software, robotics, and full-stack manufacturing, we help aerospace and defense companies…
Added 23 mins ago
Audio Visual Technology Specialist
EMC
United States
…presentations. Configures and maintains technologies, assists with AV hardware and software implementation and lifecycle management, maintains documentation and configuration information,…
Added 24 mins ago
Robotics Systems Engineer
Skild AI
San Mateo, CA
We are seeking a Robotics Systems Engineer to own the system-level architecture, integration, and reliability of a new robotic platform. You will work across mechanical design, electrical…
Added 28 mins ago
AS
Systems Integration Engineer
AMERICAN SYSTEMS
Arlington, VA
- $130,000 to $150,000 USD / year
5-7 years of related experience in systems engineering, systems integration, hardware/software integration and test, or mission-system development.
Added 28 mins ago
AS
Mission Assurance Engineer, Senior (Part-Time)
AMERICAN SYSTEMS
Washington, DC
- $75 to $95 USD / hour
- Part-time
Lead mission-assurance and quality efforts for complex hardware, software, firmware, and integrated mission systems.
Added 30 mins ago
Network Administrator (Korean Bilingual)
SBT Global, Inc.
Irvine, CA
Support Azure network integration and administer Fortinet hardware VPN.
Added 37 mins ago
Senior Engineer – Spacecraft System Test Engineer (AI&T) - $15K Sign On Bonus
BAE Systems
Boulder, CO
BAE Systems Aerospace & Mission Systems (AMS) is seeking a Senior Engineer to support the testing and execution of space flight hardware. This role is designed for a technical professional…
Added 37 mins ago
Senior Engineer – Spacecraft System Test Engineer (AI&T)
BAE Systems
Boulder, CO
Job Description BAE Systems Aerospace & Mission Systems (AMS) is seeking a Senior Engineer to support the testing and execution of space flight hardware. This role is designed for a…
Added 38 mins ago
V
Senior Software Engineer
Verustruct
Torrance, CA
- $180,000 to $230,000 USD / year
Verustruct is working to build the operating system for the future of affordable construction. As a senior software engineer on the team, you will lead the development of Verustruct's…
Added 39 mins ago
Senior Connectivity Systems Engineer
Mossville, IL
The Senior Connectivity Systems Engineer will provide end-to-end technical leadership for the development, integration, and delivery of machine connectivity capabilities. This role will…
Added 39 mins ago
Test & Validation Engineer
Lafayette, IN
The Test & Validation Engineer focuses on Gas/DF HIL Software Validation. The scope of this role will include configuring HIL hardware, integrating engine plant models, and validating NPI,…
Added 43 mins ago
Fellow Systems Engineer
Boston Scientific
Valencia, CA
You will apply deep technical expertise and systems-level thinking to solve complex engineering challenges, influence technology direction, and ensure the successful integration of…
Added 53 mins ago
Applied Research and Development GEOINT Engineer
Matrix Research, Inc.
Beavercreek, OH
We work as a team: We are a collaborative company comprised of highly-educated industry leaders in radar systems, image and signal processing, machine learning, hardware development, and…
Added 55 mins ago
Test Engineer - Electric Propulsion, Satellites (Starlink)
SpaceX
Redmond, WA
Operate and troubleshoot data acquisition and control systems, wiring, and instrumentation with primarily Beckhoff/TwinCat DAQ systems and python-based test software.
Added 55 mins ago
Principal Analog/Mixed-Signal ASIC Design Engineer
Taara
Sunnyvale, CA
Taara is seeking a Principal Analog/Mixed-Signal ASIC Design Engineer to work on the next generation of co-integrated electronic and photonic modules. You will be part of an R&D team…
Added 1 hour ago
Robotics Engineer (Product / Electrical)
Becoming
San Francisco, CA
Most experimental systems fail when metabolic demands become too high. We are building systems that don’t - by combining engineered metabolic environments, sensing, control, and software…
Added 1 hour ago
IG
Systems Engineer III
Insight Global
Centennial, CO
- From $49 USD / hour
The Systems Engineer III will support the development, integration, and verification of complex spacecraft and aerospace systems while serving as a Systems Engineering focal for a specific…
Added 1 hour ago
Senior Staff Software Engineer, Audio Systems, XR
Google
San Jose, CA
Google's software engineers develop the next-generation technologies that change how billions of users connect, explore, and interact with information and one another. Our products need to…
Added 1 hour ago
Senior BSP / Platform Software Engineer
Micas Networks
San Jose, CA
Micas Networks is seeking a hands-on, experienced Senior BSP / Platform Software Engineer to own the board support package (BSP) and low-level platform software for our SONiC-based data…

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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