Jobs in the United States

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Added 1 min ago
Staff Environmental Geologist / Scientist / Engineer
TRC Companies, Inc.
Concord, CA
…long-lasting impacts for our communities and our clients in the power and energy, transportation and infrastructure, environmental, and property and buildings sectors. As part of our team,…
Added 15 mins ago
Senior Hardware Engineer - Cross Domain Solutions (SME)
CACI International
Fort Meade, MD
Optimize existing hardware systems to improve performance, reliability, power efficiency, and lifecycle sustainability.
Added 30 mins ago
Mechatronics Controls Engineer
Apple
Sunnyvale, CA
…future. One of Apple’s R&D groups is seeking a Robotics Controls Engineer to develop, prototype, and validate complex, next-generation systems. In this role, you will build capabilities to…
Added 31 mins ago
Hardware Validation Engineer
NVIDIA USA
OR
We seek a HW Validation Engineer to join our System Products Team. This role offers you the ability to assist in building NVIDIA’s next generation of high-performance computing products.…
Added 47 mins ago
QA/QC Electrical Engineer
KURITA
Minneapolis-Brooklyn Park, MN
Kurtia America Inc. is seeking a detail-oriented QA/QC Electrical Engineer to plan, implement, and maintain quality assurance and quality control activities for electrical engineering,…
Added 49 mins ago
Senior Software Technical Program Manager
Muon Space
San Jose, CA
We are seeking a Senior Technical Program Manager (TPM) to drive cross-functional planning and execution for our High Performance Compute, Simulation, and Test Teams. In this role, you will…
Added 55 mins ago
Eng II, Structural Engineer
RTX
United States
Pratt & Whitney is a world leader in the design, manufacture and service of aircraft engines and auxiliary power systems and has been revolutionizing modern flight for over 100 years. Join…
Added 55 mins ago
Electrical Design Engineer - New Glenn Hardware-in-the-Loop
Blue Origin LLC
Seattle, WA
…Diagrams (BIDs) to map system-level connectivity, signal flow, and power distribution across HIL racks, Avionics equipment, and simulation/EGSE…
Added 58 mins ago
Intern, Process Engineering
ASM
United States
As a Process Engineer Intern at ASM, you will gain hands-on experience working with advanced semiconductor processing and analytical equipment while supporting the research, development,…
Added 58 mins ago
Intern, Electrical Engineering
ASM
United States
We are seeking a motivated Hardware Engineer Intern, Electrical to join our engineering team and gain hands-on experience supporting the design, integration, testing, and continuous…
Added 1 hour ago
Engineer I-Sr (Pwr Gen)
Entergy
Westwego, LA
This position will be filled as an Engineer I, II, III, or Sr. based up on the experience and qualifications of the selected candidate.
Added 1 hour ago
Principal Electrical Power Engineer, RF Payloads - TeraWave
Blue Origin LLC
Seattle, WA
We are seeking an experiencedElectrical Power Engineerto join the TeraWave team at Blue Origin. In this role, you will be responsible for the architecture, design, analysis, and…
Added 1 hour ago
AM
Senior Systems Administrator
Astro Mechanica
San Francisco, CA
- $140,000 to $170,000 USD / year
Astro Mechanica is a vertically integrated aerospace company developing a scalable technology platform to power critical infrastructure, mission operations, and the future of flight. We…
Added 1 hour ago
[US] Electronic Engineer
EdgeCortix
Remote, United States
We are seeking a highly skilled Senior Electronic Engineer to lead the design, development, and validation of our next-generation, high-speed PCIe-based hardware products. In this role, you…
Added 1 hour ago
Senior Power Systems Electrical Engineer
Honeywell Technologies
Baltimore, MD
Honeywell is seeking a dedicated Senior Advanced Electrical Engineer to serve as the subject matter expert for the University of Maryland (UMD) NextGen Energy Program Public-Private…
Added 1 hour ago
REMOTE Senior Amazon Connect Engineer
Insight Global
Baltimore, MD
Insight Global is seeking a Senior AWS Amazon Connect Engineer for a top power generation client. This individual will take ownership of the design, implementation, integration,…
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
AA
Product Manager, Incentives
Augeo Affinity Marketing, Inc.
St Paul, MN
- $125,000 to $152,000 USD / year
…THEO capability set that brings intelligence and automation to performance incentive programs, enabling organizations to configure programs, evaluate participant performance, identify…
Added 1 hour ago
G
Chemical Engineer
GPAC
Rapid City, SD
- $90,000 to $125,000 USD / year
A power generation company operating in wholesale energy markets is seeking a Chemical Engineer to lead critical engineering functions that support safe and reliable plant operations.
Added 1 hour ago
Building Engineer
US AMR-Jones Lang LaSalle Americas, Inc.
Manassas, VA · Alexandria, VA · Arlington, VA · Washington, DC
As an Operating/Building Engineer, you'll play a critical role in keeping our facilities running at peak performance during overnight hours. This position centers on operating, maintaining,…
Added 2 hours ago
Sr Validation Engineer (RF, mmWave & Mixed-Signal) - TeraWave
Blue Origin Personnel, LLC
San Diego, CA · Cupertino, CA
…interfaces. As a Senior RF/mmWave & Mixed-Signal Validation Engineer, you prove that silicon works on the bench. You bring up first samples, characterize RF and mixed signal performance…
Added 2 hours ago
Software Engineer II - TeraWave
Blue Origin Personnel, LLC
Cupertino, CA
We are seeking a Software Engineer to join our PoP development team which is the high-performance, fast-path software that powers the TeraWave Point of Presence (PoP).
Added 2 hours ago
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Staff Software Engineer, Full Stack
Gridware
San Francisco, CA
- $245,000 to $260,000 USD / year
We’re seeking a Staff Software Engineer who will serve as a technical force multiplier and elevate the entire software engineering organization through architectural excellence, mentorship,…
Added 2 hours ago
Nuclear Uncertainty & Drift Analysis Subject Matter Expert (SME)
Enercon Services, Inc.
Kennesaw, GA · Chattanooga, TN · Charlotte, NC · Naperville, IL · Chicago, IL · Baton Rouge, LA · Palm Beach Gardens, FL · King of Prussia, PA · Overland Park, KS · Huntsville, AL · Kennewick, WA · Morristown, NJ · Aiken, SC · UNAVAILABLE
Previous experience supporting commercial nuclear power plants, engineering consulting organizations, or architect-engineer firms
Added 2 hours ago
Software Development Engineer II, KMS
Amazon Development Center U.S., Inc.
Seattle, WA
…directly impacts millions of customers? As a Software Development Engineer II at Amazon, you will design, implement, and deliver features across the full software development lifecycle. You…

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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