Jobs in the United States

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Added 1 min ago
Senior Software Engineer, AI/ML
Google
Mountain View, CA
5 years of experience with software development in one or more programming languages.
Added 1 min ago
Senior Site Reliability Engineer
Jobgether
Remote, United States
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Site Reliability Engineer based in the United States.
Added 2 mins ago
Senior Software Engineer (Institutional, Financing)
Coinbase
Honolulu, HI
Added 2 mins ago
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Senior Database Site Reliability Engineer – Oracle Database and GoldenGate (IC3)
Oracle
Honolulu, HI
- $81,100 to $187,000 USD / year
Oracle Health Database Services is seeking a highly experienced, Site Reliability Engineer to lead database reliability engineering across mission-critical healthcare platforms.
Added 7 mins ago
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ERP Software Engineer
Schweitzer Engineering Laboratories, Inc.
Pullman, WA
- $82,000 USD / year
Schweitzer Engineering Laboratories (SEL) seeks a creative and talented software engineer who is passionate about solving problems and improving the lives of people. SEL develops critical…
Added 11 mins ago
Software Engineer for Packet Forwarding (Sunnyvale, California)
Hewlett Packard Enterprise
Sunnyvale, CA
Added 11 mins ago
Software Engineer III
Robert Half
Remote, United States
Robert Half is seeking a Software Engineer III who will analyze, design, program, debug, test, implement and modify software enhancements and/or new applications used in local, networked,…
Added 13 mins ago
Staff Software Engineer, Fullstack
QXO
Seattle, WA
Added 25 mins ago
Embedded Software Engineer II
Wabtec Corporation
Germantown, MD
…Train Control Equipment. In this role, the Senior Embedded Software Engineer will work with a cross-functional Engineering team to design and develop new functionalities, as well as…
Added 25 mins ago
Junior Azure Cloud Administrator
SAIC
Rockville, MD
Added 25 mins ago
Lead Software Engineer - Java, Microservices, MuleSoft & API Development (Remote)
CareFirst
Baltimore, MD
The Lead Software Engineer provides technical leadership for the design, development, integration, testing, deployment, and support of enterprise-scale software solutions, APIs, and…
Added 25 mins ago
EG
Lead Software Engineer
Eliassen Group
Rockville, MD
- $75 to $83 USD / hour
Working independently, the Lead Software Engineer will own development of software products, improve product quality throughout the software development life cycl
Added 52 mins ago
Software Engineer II, Fullstack
PathAI
Boston, MA
Added 59 mins ago
Senior Software Engineer, Ground Station Platform
Muon Space
San Jose, CA
Muon is looking for a Senior Software Engineer to join our team and help scale our core platforms. In this role, you'll design foundational architecture, ship customer-facing features with…
Added 1 hour ago
Entry Level Software Engineer
Jacobs
Nashua, NH
…aircraft solutions using unique technology applications and Agile software development capabilities to improve mission agility, capability and operational…
Added 1 hour ago
Software Engineer for Packet Forwarding (Sunnyvale, California)
Hewlett Packard Enterprise
Sunnyvale, CA
Added 1 hour ago
Cloud Engineer
UMB Bank
Kansas City, MO
Added 1 hour ago
Software Development Engineer, SoC HAL
Annapurna Labs (U.S.) Inc.
Cupertino, CA
Annapurna Labs builds the custom silicon at the heart of AWS machine learning servers, and we are hiring a software engineer to help build the Hardware Abstraction Layer (HAL) that brings…
Added 1 hour ago
Staff Software Development Engineer · IT Design & Development
IQVIA INC (US10)
Wayne, PA
The Staff Software Engineer will play a critical role in the onboarding, transformation, integration, and provisioning of large-scale patient-level healthcare datasets into core data assets…
Added 1 hour ago
Software Engineer III
Robert Half Inc.
Remote, United States
Robert Half is seeking a Software Engineer III who will analyze, design, program, debug, test, implement and modify software enhancements and/or new applications used in local, networked,…
Added 1 hour ago
Senior Backend Software Engineer
Flexcompute Inc.
Madison, WI
…including the industry-leading Computational Fluid Dynamics (CFD) software Flow360 and electromagnetic simulation software Tidy3D, are reshaping how simulations are conducted across diverse…
Added 1 hour ago
Software Engineer, Analytics Platform
Gridmatic Inc
Cupertino, CA
…electricity to retail customers. We’re looking for a startup-minded software engineer who’s great with data: you'll build the data systems our business runs on, designing core data models…
Added 2 hours ago
Flight Simulation Software Engineer (Associate, Experienced, and Senior)
The Boeing Company
Daytona Beach, FL
The Boeing Company is looking for a Flight Simulation Software Engineer ( Associate , Experienced, and Senior) to join the Flight Simulation I Labs team located in Dayton Beach, FL. This…
Added 2 hours ago
Software Engineer Fellow
NCR VOYIX
Tallahassee, FL
Added 2 hours ago
Staff Software Engineer - Orders Platform
Jobgether
Remote, United States
…applications and next steps. Our partner is looking for a Staff Software Engineer - Orders Platform based in United States…

SpaceXSI

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

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

$220,000 - $357,000 USD

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Job details

Pay: $220,000 - $357,000 USD
Experience: 5+ years of experience with low-level system programming experience in C/C++ or Rust
Posting language: English
Posted: Nov 5, 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:

$220,000 - $357,000 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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