Sr. Software Engineer, Network (C++)

Palo Alto, CAfull timeOn Site

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senior

$200k–$375k

H1B: no

xAI Sr. Software Engineer at SpaceXSI develops core networking software for the Colossus datacenter network to maximize performance and reliability. The role involves designing, implementing, and deploying software for a large-scale AI supercomputer network.

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

Qualification

Bachelor’s degree in computer scienceDevelopment experience in C or C++Experience developingBackground in real-time systemsAbility to thrive in a fast-paced

Required

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

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

Benefits

Dental
Vision
401(k)
Equity/RSU
Life Insurance

Company

xAI

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Source: greenhouse

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