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Senior Associate Engineer - Mechanical
McKinstry Company
Missoula, MT
Our team is growing! We are currently seeking a Senior Associate Engineer - Mechanical to join our Engineering and Design divison in Missoula, MT. Engineers at McKinstry are unsurpassed in…
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Senior Mainframe z/OS Engineer (Remote/ Work from Home)
First National Bank of Omaha
Billings, MT
The Mainframe Senior Engineer Position is part of a managed services engineering team. The Mainframe Senior Engineer is responsible for maintaining customer environments and solving…
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Staff Machine Learning Engineer - Mapping
General Motors
Helena, MT
Our Mapping organization is building national-scale, next-generation mapping systems that move beyond static HD maps toward automated, ML-driven map reconstruction pipelines powered by…
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Software Development Manager
Oracle
Helena, MT
- $112,800 to $264,100 USD / year
This is a high-impact leadership role for someone who enjoys solving complex problems in distributed systems, identity, security, and cloud infrastructure. You will lead engineering teams…
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Power Platforms Mid Engineer
Serco
Helena, MT
…details across a wide variety of disciplines to join our Maritime Engineering Operation (MEO). This candidate will design, develop, and support low-code solutions (Power Apps, Power…
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Senior Analyst, Compliance Technology
Coinbase
Helena, MT
…obligations at scale, partnering with Compliance, Product, and Engineering to ensure monitoring and investigative controls are effective, measurable, and auditable. You'll build and own…
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Electrical Engineer 3
Pacific Northwest National Laboratory
Helena, MT
- $122,100 USD / year
The Operational Systems Engineering group within the Earth Systems Science Division seeks a mid-career Electrical Engineer to support research, development, and deployment activities…
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Smile CDR Integration Developer
CAI
Helena, MT
- $62 to $72 USD / hour
Build and support API integrations with internal and external systems
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Smile CDR Administrator
CAI
Helena, MT
- $65 to $72 USD / hour
Partner with architecture, engineering, and business teams on interoperability initiatives
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Architect - Infrastructure Systems
Akamai Technologies, Inc.
Helena, MT
- $146,400 to $263,600 USD / year
Developing and extending production-grade Python components and data pipelines supporting decision systems
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Core Senior .NET Software Engineer
Evolent
Helena, MT
Utilize approved AI-assisted engineering tools to accelerate software development, testing, documentation, troubleshooting, and analysis activities.
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Software Engineer II - Marketplace Efficiency (Bidding)
Indeed
Helena, MT
…services, and products used across the company. You'll work on systems that operate at significant scale, collaborating closely with engineers, product partners, and other cross-functional…
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Software Engineer II
Amentum
Helena, MT
Amentum is a global leader in advanced engineering and innovative technology solutions, trusted by the United States and its allies to address their most significant and complex challenges…
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Advanced Lead Supplier Quality Engineer - Composites
GE Aerospace
Helena, MT
Demonstrated experience in assembly, composites and/or systems engineering
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Mainframe Technical Engineer
Highmark Health
Helena, MT
Bachelor’s degree in Computer Science, Information Systems, Computer Engineering or relevant experience and/or education as determined by the company in lieu of bachelor's degree.
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Director - Digital Operations, Manufacturing Execution
GE Aerospace
Helena, MT
Experience with Manufacturing Execution Systems (MES), manufacturing applications, or other business-critical digital platforms
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Billing Associate
EFI Global
Helena, MT
- $22 to $25 USD / hour
EFI Global is a full-service engineering, fire investigation, environmental, health and safety, and specialty consulting services firm serving a variety of industries in both the public and…
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Electrical Engineer III
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Columbia Falls, MT
o Team 3 – Advanced: Develops novel systems and resolves first-of-kind engineering challenges.
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Senior Java Full-Stack Developer
Eliassen Group
Helena, MT
- $70 to $80 USD / hour
Design and develop RESTful APIs, web services, microservices, and integrations with internal and third-party systems.
Added 1 min ago
Technical Manager, Information Security
Atomic Machines
Emeryville or Santa Clara, CA
…role within the IT team. The Technical Manager, Cybersecurity Engineering is a hands-on leadership role responsible for managing the full lifecycle of enterprise cybersecurity tools,…
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Sr. Field Service Technician, Night Shift - Bellevue, WA
Rivian
Bellevue, WA
- $33.29 to $62.96 USD / hour
Documentation & Technical Feedback: Produce high-quality documentation in service support and engineering systems; provide root-cause analysis and actionable feedback to field service…
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Sr. Field Service Technician - Bothell, WA
Rivian
Bothell, WA
- $33.29 to $62.96 USD / hour
Documentation & Technical Feedback: Produce high-quality documentation in service support and engineering systems; provide root-cause analysis and actionable feedback to field service…
Added 4 mins ago
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Supply Chain Analyst
Aston Carter
Bellevue, WA
- $25 to $27 USD / hour
Hands-on experience working with relational and non-relational databases such as Redshift, Oracle, or NoSQL systems.
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Expeditor / Purchasing Associate
Aston Carter
Riverside, CA
- $28 to $33.5 USD / hour
Leverage advanced Excel tools and ERP/MRP systems to analyze procurement data and provide actionable insights.
Added 4 mins ago
Staff Technical Program Manager, Diagnostic Engineering
Rivian
Hayward, CA · Irvine, CA
Diagnostic Engineering works throughout the service, software and engineering communities to ensure our customers have the best experience possible with their vehicle.

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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