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Added 8 mins ago
Electrical Engineer
Shermco Industries, Inc.
Cedar Park, TX
Bachelor's degree in Electrical Engineering; with experience focused in Facilities Power Systems. A professional engineer licensed (PE) is preferred.
Added 14 mins ago
RU
Cloud Engineer - Sr
Randstad USA
Remote, United States
- $88.55 to $98 USD / hour
We are seeking an experienced Senior Cloud Engineer to design, build, and optimize scalable, highly available, and secure cloud infrastructure. In this role, you will lead the…
Added 18 mins ago
Principal Engineer Process
Northrop Grumman
Los Angeles, CA · Los Angeles
The Manufacturing Engineering Department is looking for a multi-disciplined Manufacturing Engineer to support all aspects of precision navigation instrument assembly and test in an…
Added 18 mins ago
Principal / Sr. Principal Engineer Software - Cloud & Applications
Northrop Grumman
El Segundo, CA · El Segundo
Northrop Grumman Aeronautics Systems has an opening for a Principal or Sr. Principal Software Engineer - Cloud and Applications to join our team of qualified, diverse individuals. This…
Added 18 mins ago
Sr Principal Engineer Manufacturing Systems
Northrop Grumman
San Diego, CA · San Diego
Northrop Grumman Mission Systems Manufacturing Engineering is seeking a Sr Principal Manufacturing Systems Engineer to join the Operations Team in San Diego, CA.
Added 18 mins ago
Lead Automation Test Engineer - Level 4
Northrop Grumman
Colorado Springs, CO · Colorado Springs
Northrop Grumman Space Systems, Multi-Domain Operations, and Missile Defense Integration Business Unit (BU) has an exciting career opportunity for a Sr. Principal Test Engineer Lead – Test…
Added 30 mins ago
Senior Design Engineer
Actalent
Mukilteo, WA
Job Title: Sr. Design EngineerJob DescriptionThe Sr. Design Engineer will be responsible for leading the mechanical design and development of aerospace structures, mechanisms, and systems…
Added 30 mins ago
Senior Design Engineer
Actalent
Mukilteo, WA
Job Title: Sr. Design EngineerJob DescriptionThe Design Engineer is a hands-on mechanical engineering role responsible for aerospace hardware from initial concept through detailed design,…
Added 30 mins ago
A
Sr Electrical Engineer
Actalent
Melville, NY
- $128,000 to $162,000 USD / year
An innovative engineering and manufacturing organization is seeking an experienced Electrical Engineer to lead the design, development, integration, and release of complex electrical…
Added 33 mins ago
Full-stack Engineer 5 (Sr. Lead / Sr. Manager IC)
Capital One
McLean, VA · Richmond, VA · NY · Wilmington, DE
…deep experience in distributed microservices, and full stack systems to create solutions that help meet regulatory needs for the…
Added 35 mins ago
UX Design Strategist
Oteemo, Inc
Remote, United States
…analyses, data-informed design proposals, and prototype and test designs for product teams and business process improvements. Our Designers work extremely closely with client stakeholders…
Added 41 mins ago
Sr. Associate, Software Engineering
L3Harris Technologies
Carlsbad, CA · Salt Lake City, UT
L3Harris is seeking a Software Engineer focused on system software development for embedded devices and communication systems. This role contributes across the full software development…
Added 41 mins ago
Sr. Silicon Design Engineer
Advanced Micro Devices, Inc
Fort Collins, CO
Job Role and Responsibility: AMD, Inc., is hiring Sr. Silicon Design Engineer to Research, design, develop, and/or test electronic components and systems for semiconductor and related…
Added 41 mins ago
Sr. Silicon Design Engineer
Advanced Micro Devices, Inc
Santa Clara, CA
Job Role and Responsibility: AMD, Inc. is hiring Sr. Silicon Design Engineer to Research, design, develop, and/or test electronic components and systems for semiconductor and related device…
Added 41 mins ago
Sr. Silicon Design Engineer
Advanced Micro Devices, Inc
Austin, TX
Job Role and Responsibility: AMD, Inc., is hiring Sr. Silicon Design Engineer to Research, design, develop, and/or test electronic components and systems for semiconductor and related…
Added 42 mins ago
Sr. Manager Product Development Engineer
Advanced Micro Devices, Inc
Austin, TX
Job Role and Responsibility: AMD, Inc. is hiring Sr. Manager Product Development Engineer to Develop and/or test electrical/electronic components and/or systems for semiconductor products.…
Added 42 mins ago
Sr. Software Development Engineer
Advanced Micro Devices, Inc
Austin, TX
Job Role and Responsibility: AMD, Inc., is hiring Sr. Software Development Engineer to Research, design, develop, and/or test operating systems-level software, compilers, and/or network…
Added 42 mins ago
Sr. Product Development Engineer
Advanced Micro Devices, Inc
Austin, TX
Job Role and Responsibility: AMD, Inc., is hiring Sr. Product Development Engineer to Develop and/or test electrical/electronic components and/or systems for semiconductor products. Support…
Added 42 mins ago
Sr. Silicon Design Engineer
Advanced Micro Devices, Inc
Orlando, FL
Job Role and Responsibility: AMD, Inc., is hiring Sr. Silicon Design Engineer to Research, design, develop, and/or test electronic components and systems for semiconductor and related…
Added 42 mins ago
Sr. Software Development Engineer
Advanced Micro Devices, Inc
Boxborough, MA
Job Role and Responsibility: AMD, Inc. is hiring Sr. Software Development Engineer to Research, design, develop, and/or test operating systems-level software, compilers, and/or network…
Added 42 mins ago
Sr. Silicon Design Engineer
Advanced Micro Devices, Inc
Santa Clara, CA
Job Role and Responsibility: AMD, Inc., is hiring Sr. Silicon Design Engineer to Research, design, develop, and/or test electronic components and systems for semiconductor and related…
Added 42 mins ago
Sr. Software Development Engineer
Advanced Micro Devices, Inc
San Jose, CA
…Development Engineers to Research, design, develop, and/or test operating systems-level software, compilers, and/or network distribution software for semiconductor operations, applying…
Added 42 mins ago
Sr. Software Development Engineer
Advanced Micro Devices, Inc
San Jose, CA
Job Role and Responsibility: Xilinx, Inc., a subsidiary of AMD, Inc., is hiring Sr. Software Development Engineer to Research, design, develop, and/or test operating systems-level software,…
Added 42 mins ago
Sr. Silicon Design Engineer
Advanced Micro Devices, Inc
Santa Clara, CA
Job Role and Responsibility: AMD, Inc., is hiring Sr. Silicon Design Engineer to Research, design, develop, and/or test electronic components and systems for semiconductor and related…
Added 42 mins ago
Sr. Silicon Design Engineer
Advanced Micro Devices, Inc
Santa Clara, CA
Job Role and Responsibility: AMD, Inc., is hiring Sr. Silicon Design Engineer to Research, design, develop, and/or test electronic components and systems for semiconductor and related…

Closed listing

SpaceXSI

Sr. Software Engineer, Training/Inference (C++)

Palo Alto, CA, United States
Seattle, WA, United States

$200,000 - $375,000 USD

This opening has closed.

The original listing is kept below for reference.

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About employer

Job details

Pay: $200,000 - $375,000 USD
Experience: 5+ years of experience with low-level system programming experience in C/C++ or Rust
Posting language: English
Posted: Nov 4, 2026

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Original job description

Archived listing. The details below describe a past opening.

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, TRAINING/INFERENCE (C++)

At SpaceXSI we are building the high-performance inference platform that serves Grok to millions of users every day. As a Software Engineer, Training/Inference (C++), you will design and optimize large-scale model serving systems end-to-end. You will own everything from distributed infrastructure – global KV cache, continuous batching, load balancing, auto-scaling – to deep low-level optimizations, including GPU kernels, quantization, speculative decoding, and tail latency. This is a high-impact role where your work directly determines how fast and reliably users interact with Grok at massive scale.

RESPONSIBILITIES:

Architect and implement scalable distributed infrastructure for model serving (load balancing, auto-scaling, batch scheduling, global KV cache)
Optimize latency and throughput of model inference under real production workloads
Build and operate high-concurrency serving systems with excellent tail latency and high reliability at the scale required to serve millions of users
Benchmark, fine-tune, and accelerate inference engines (including low-level GPU kernel work and code generation)
Develop custom tools to trace, replay, and fix issues across the full stack - from orchestration down to GPU kernels
Create robust CI/CD infrastructure for seamless endpoint deployment, image publishing, and inference engine updates
Accelerate research on scaling test-time compute, RL rollout, and model-hardware co-design for next-generation systems

BASIC QUALIFICATIONS:

Bachelor’s degree in computer science, computer engineering, or science discipline
5+ years of experience with low-level system programming experience in C/C++ or Rust

PREFERRED SKILLS AND EXPERIENCE:

Experience with large-scale, high-concurrent production serving
Experience with GPU inference engines (e.g., vLLM, SGLang, Triton, TensorRT-LLM)
Strong background in system optimizations: batching, caching, load balancing, parallelism
Low-level inference optimizations: GPU kernels, code generation
Algorithmic inference optimizations: quantization, speculative decoding, distillation, low-precision numerics
Experience with testing, benchmarking, and reliability of inference services
Experience designing and implementing CI/CD infrastructure for inference

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++
Scheduling
CI/CD
Research
Model hardware
BASIC
Computer science
Computer engineering
C
Rust

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