Jobs in the United States

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Added 2 mins ago
M
Principal Software Engineer
Microsoft
BC, CA
- $142,400 to $257,500 CAD / year
Added 3 mins ago
A
Electrical Engineer
Actalent
Halfmoon, NY
- $120,000 to $160,000 USD / year
Electrical Engineer - Power Electronics & LED Systems
Added 4 mins ago
Software Engineering - Senior Software Engineer 134-2011
CommunityCare
Tulsa, OK
The Sr. Software Engineer will build out the next generation of our platform. As a Sr. Software Engineer, you are expected to work independently, and within teams, leading the development…
Added 5 mins ago
J
Cyber Security Engineer (Cloud Security)
Jobgether
Remote, United States
- $110,000 to $130,000 USD / year
…and next steps. Our partner is looking for a Cyber Security Engineer (Cloud Security) based in the United…
Added 5 mins ago
J
Cloud - Bare Metal Infrastructure Engineer
Jobgether
Remote, United States
- $230,000 to $290,000 USD / year
…partner is looking for a Cloud – Bare Metal Infrastructure Engineer based in United States…
Added 12 mins ago
TV
Director, Capital Design and Construction Engineering, Full Time, Day
The Valley Hospital
United States
- Full-time
Added 21 mins ago
Senior Associate Engineer - Mechanical
McKinstry Company
Missoula, MT
Added 21 mins ago
Transmission Line Project Engineer (Rocky Mountain)- Remote
WSP USA
Bozeman, MT · Billings, MT
WSP is seeking a Transmission Line Project Engineer to join our Power Delivery Team. This position offers a flexible work arrangements, with the option to work remotely or from one of our…
Added 21 mins ago
Senior Mainframe z/OS Engineer (Remote/ Work from Home)
First National Bank of Omaha
Billings, MT
Added 21 mins ago
AT
Network Infrastructure Engineer II
Akamai Technologies, Inc.
Helena, MT
- $83,200 to $149,800 USD / year
Added 21 mins ago
Core Senior .NET Software Engineer
Evolent
Helena, MT
Added 21 mins ago
Software Engineer II - Marketplace Efficiency (Bidding)
Indeed
Helena, MT
As a Software Engineer II at Indeed, you will design and build software that powers shared platforms, servic
Added 21 mins ago
Civil Engineering Specialist - Road Design
State of Montana
Helena, MT
Added 21 mins ago
Software Engineer II
Amentum
Helena, MT
The Software Engineer II will perform full stack development with C# program, ReactJS, MVC, Linq, and rest API development in NET Core platfo
Added 21 mins ago
Lead Site Reliability Engineer - Remote
SitusAMC
Helena, MT
Added 21 mins ago
Platform Engineer - Remote
SitusAMC
Helena, MT
Added 21 mins ago
Account Executive (Central)
Verint Systems, Inc.
Helena, MT
Added 21 mins ago
Mainframe Technical Engineer
Highmark Health
Helena, MT
Added 21 mins ago
Electrical Engineer III
Nomad Global Communication Solutions
Columbia Falls, MT
Nomad GCS is currently seeking a Level III Electrical Engineer. Please note the Level III Expectation in red below.
Added 21 mins ago
EG
Quality Assurance Engineer - PHP
Eliassen Group
Helena, MT
- $40 to $50 USD / hour
Our client seeks a results-driven Senior Quality Assurance Engineer to support Policyholder Portal applications. The role requires manual, automation, mobile, AP
Added 24 mins ago
Structural Safety Engineer (CAE)
Rivian
Irvine, CA
Added 24 mins ago
Sr. Systems Integration Engineer, Automated Drive
Rivian
Palo Alto, CA
Added 24 mins ago
Sr. Systems Integration Engineer, Automated Drive
Rivian
Palo Alto, CA
Added 25 mins ago
VI
System Test Lead
Viasat, Inc.
Carlsbad, CA · Reston, VA · Germantown, MD
- $190,500 to $285,500 USD / year
Added 26 mins ago
PN
Senior Software Engineer III
Pacific Northwest National Laboratory
Richland, WA · Seattle, WA
- $133,100 USD / year

SpaceXSI

Sr. Software Engineer, Training/Inference (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 experience with low-level system programming experience in C/C++ or Rust
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, 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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