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Senior Specialist, Mechanical Engineer (Mechanisms)
L3Harris Technologies
Carlsbad, CA · Chantilly, VA · Palm Bay, FL
Job Title: Sr. Specialist, Mechanical Engineer (Mechanisms)
Added just now
Engineer 1 - Inventory
Nordstrom Inc
Seattle, WA
…other areas of the Company to develop and support the business systems used throughout…
Added 1 min ago
T
Staff Backend Engineer - Performance - US
Teleport
Remote, United States
- $222,000 to $342,000 USD / year
…and AI agent a cryptographically secured identity, improving engineering velocity while maintaining security. We make trusted computing simple. This gives you the freedom, power, and…
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
We are seeking a DevOps & Platform Engineer (P2) with 2+ years of professional experience to join the Sana Search Team. In this role, you will support the day-to-day health, automation, and…
Added 2 mins ago
Organic Chemist
BNH
Arnold AFB, TN
Beyond New Horizons, LLC (BNH) has an exciting opportunity for a chemist to join the Engineering Solutions team supporting the Test Operations and Sustainment contract at Arnold Engineering…
Added 2 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 3 mins ago
Principal, Cybersecurity Automation - Remote
Stryker
Remote, United States
Build and maintain integrations across endpoint security, detection engineering, security data platforms, asset inventory, threat intelligence, and ticketing systems.
Added 3 mins ago
J
Machine Design Engineer
Jobot
Culver City, CA
- $100,000 to $130,000 USD / year
…greater Los Angeles area, seeking an experienced Machine Design Engineer to join our engineering team. This is a hands-on mechanical engineering role. You will take projects from concept…
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
2027 Associate Structural Engineer / Structural Engineer - Dulles VA or McLean VA
SP - Orbital Space Systems
United States
The Mechanical Systems Engineering team is looking for an early career engineer to assist an experienced team of mechanical engineers with the mechanical, systems, structural, and design…
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
Principal Systems Engineer (T03): Bachelor's degree in a Science, Technology, Engineering or Mathematics (STEM) discipline from an accredited university and 5 years of experience, 3 years…
Added 3 mins ago
Sentinel - Principal / Sr Principal Systems Engineer - 18977
CORP-Corporate Office
United States
Principal Systems Engineer (T03): Bachelor's degree in a Science, Technology, Engineering or Mathematics (STEM) discipline from an accredited university and 5 years of experience, 3 years…
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
Electrical Engineer - Level 2
SP - Synoptics
United States
SYNOPTICS is seeking an experienced Electrical Engineer to support facilities engineering and manufacturing operations, with a focus on power distribution, control logic, and equipment…
Added 3 mins ago
Senior Principal Systems Engineer *
CORP-Corporate Office
United States
Northrop Grumman’s Space Systems Sector is seeking a Systems Engineer – Level 4 to join our team in our Fairfax, VA or Morrisville, NC locations.
Added 3 mins ago
Principal Engineer Microelectronic Semiconductors/Sr Principal Engineer Microelectronic Semiconductors
CORP-Corporate Office
United States
Northrop Grumman Mission Systems Manufacturing Operations Engineering Team in Baltimore/Elkridge, MD seeks a Principal Microelectronics Semiconductor Manufacturing Engineer / Sr. Principal…
Added 3 mins ago
Principal or Sr. Principal DevOps Engineer
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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
Principal Engineer Manufacturing
CORP-Corporate Office
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We are looking for you to join our team as an Principal Engineer Manufacturing out of Buffalo, NY. Amherst Systems Operating Unit (OU) is an organization focused on the development and…
Added 3 mins ago
CO
2027 Electrical Engineering Intern- Huntsville AL
CORP-Corporate Office
United States
- $25.5 to $39 USD / hour
Northrop Grumman is seeking an Electrical Engineer for an internship opportunity. This position will be located at our Defense Systems Sector in Huntsville, AL.
Added 3 mins ago
Principal/ Sr Principal Mission Assurance Engineer - 18208
CORP-Corporate Office
United States
Northrop Grumman Defense Systems is seeking a Principal/Sr. Principal Mission Assurance Engineer to support the SLCM-N Program Quality & Mission Assurance Team in Huntsville, AL. This role…
Added 3 mins ago
Staff Engineer Embedded Software
CORP-Corporate Office
United States
…our customer’s high expectations. The Staff Embedded Software Engineer designs, develops, operates, and maintains software and firmware components and computing systems software to be…
Added 3 mins ago
Sentinel - Systems Engineer / Principal Systems Engineer - 20060
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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)…

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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