Jobs in the United States

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Senior Scientist, Protein Sciences
Systimmune
Bothell, WA
- $110,000 to $130,000 USD / year
…developing innovative cancer treatments using its established drug development platforms, focusing on bi-specific, multi-specific antibodies, and antibody-drug conjugates (ADCs). SystImmune…
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Scientist, Protein Sciences
Systimmune
Bothell, WA
- $90,000 to $115,000 USD / year
…developing innovative cancer treatments using its established drug development platforms, focusing on bi-specific, multi-specific antibodies, and antibody-drug conjugates (ADCs). SystImmune…
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Test Engineer
Leviton Manufacturing
Melville, NY
Provide technical support to manufacturing facilities with testing and test equipment
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Cloud Engineer (Senior)
BAE Systems
Herndon, VA
…engineering, field engineering, application management and development for networks, network analytics, firewalls, network access controls and bandwidth service delivery. This is a fast…
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Process Engineer
Tetra Pak
Brooklyn Park, MN
- $86,700 to $111,400 USD / year
The Process Engineer will focus on designing and implementing process and application solutions. This is an opportunity to interface with our extensive customer base and provide…
Added 1 min ago
Staff Civil/Geotechnical/Mechanical Engineer
Geoengineers Inc
Cary, NC
As a Staff Civil/Geotechnical/Mechanical Engineer in our pipelines discipline, you will have an opportunity for short-term and long-term career advancement and to gain experience in both…
Added 1 min ago
Senior Engineer, New Product Introduction
Edwards Lifesciences LLC
CA
The Senior Engineer, New Product Introduction leads the commercialization of Class III implantable THV products, driving supply chain and manufacturing readiness from early development…
Added 2 mins ago
Senior Software Engineer - Python
Veeva
Remote, United States
As Senior Software Engineer for a new product within Veeva, you will be a founding member of a team building our next major AI-driven platform - one that will transform how Life Sciences…
Added 2 mins ago
Senior Software Engineer - Fullstack with Rust
Veeva
Remote, United States
We are looking for a Fullstack Sr. Software Engineer who is energized by building a new agent first CRM platform from 0 to 1. You will have a high degree of ownership over the entire stack:…
Added 2 mins ago
Senior Software Engineer - Fullstack with Rust
Veeva
Remote, United States
We are looking for a Fullstack Sr. Software Engineer who is energized by building a new agent first CRM platform from 0 to 1. You will have a high degree of ownership over the entire stack:…
Added 2 mins ago
Software Engineer -ICAM Web Development | SWE3| TS/SCI w/ MD POLY Security Clearance required
Power3 Solutions
Hanover, MD
This position is for a Software Engineer to support mission-critical web service development in support of an Identity, Credential, and Access Management (ICAM) solution. Technical…
Added 2 mins ago
Systems Integrator Systems Engineer| TS/SCI w/ MD poly security clearnance
Power3 Solutions
Hanover, MD
…software solutions for federal defense clients. We combine deep technical expertise with a people-first culture to help modernize securely, accelerate capability delivery, and strengthen…
Added 2 mins ago
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Automation Developer
Robert Half
Remote, United States
- $90,000 to $110,000 USD / year
We are looking for an Automation Engineer to help advance workflow efficiency and the design and deployment of applications for a healthcare organization. This role partners with…
Added 3 mins ago
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AI Development
Robert Half
Remote, United States
- $70 to $90 USD / hour
We are looking for an experienced AI Development specialist to contribute to healthcare-focused software initiatives in Wisconsin. This long-term contract opportunity is ideal for an…
Added 3 mins ago
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Sr. Data Engineer
Robert Half
Minneapolis, MN
- $115,000 to $144,000 USD / year
We are looking for a Senior Data Engineer to strengthen our data foundation and help deliver reliable, scalable information solutions across Minneapolis, Minnesota. In this role, you will…
Added 3 mins ago
BC
Assistant County Administrator
Beaufort County South Carolina
Beaufort, SC
- $127,899.2 to $165,942.4 USD / year
The purpose of this position is to perform a variety of complex professional, administrative and technical support functions for the Deputy County Administrator, County Administrator and…
Added 4 mins ago
Structural Engineer III
Passero Associates
Charlotte, NC
Provide technical mentoring, training, and professional development guidance to more junior staff.
Added 4 mins ago
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Sr Software Engineer
Vontier
Virtual
- $112,300 to $140,000 USD / year
This position will act as a technical mentor to less experienced engineers and help set the standards for internal web-focused development
Added 5 mins ago
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Staff Software Engineer, Compiler
Code Metal
Boston, MA · San Francisco, CA · Washington, DC
- $170,000 to $200,000 USD / year
- 7+ years of professional software development in C++ and/or Python, shipping to real users.
Added 5 mins ago
CM
Senior Software Engineer, Compiler
Code Metal
Boston, MA · San Francisco, CA · Washington, DC
- $170,000 to $200,000 USD / year
- 5+ years of professional software development in C++ and/or Python, shipping to real users.
Added 5 mins ago
Sr. NMS (Network Management System) Engineer
Micas Networks
San Jose, CA
…Micas also offers comprehensive data center networking switch development services and custom options, leveraging R&D, engineering, and supply chain management expertise along with…
Added 5 mins 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…
Added 6 mins ago
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Lead Software Engineer
Green Dot Corporation
Los Angeles, CA
- $141,918 to $199,300 USD / year
We are seeking a highly skilled and motivated Lead Software Engineer to join our team, supporting a highly transactional (approx. 500-800 TPS) system. This role will be instrumental in…
Added 6 mins ago
Senior Software Engineer (REST API & Springboot )
U.S. Bank National Association
Irving, TX
This position will be responsible for the analysis, design, testing, development and maintenance of best in class software experiences. The candidate is a self-motivated individual who can…
Added 6 mins ago
Staff Process Development Engineer
Dexcom
San Diego, CA · San Diego
You will be part of the Global Engineering team within Operations, tasked with end-to-end technical oversight of our manufacturing technologies spanning our suppliers, contract…

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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