Jobs in the United States

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Added 2 hours ago
RH
Project Lead
Robert Half
Eagan, MN
- $40 to $44 USD / hour
We are looking for an experienced Sr. Systems Engineer to join a healthcare-focused technology team in Minnesota. This contract-to-permanent opportunity will lead the design, support, and…
Added 2 hours ago
RH
Sr. Systems Engineer
Robert Half
St. Paul, MN
- $55 to $68 USD / hour
We are seeking a Senior Systems Engineer to join our Infrastructure Team. This role is responsible for the design, implementation, administration, and support of enterprise infrastructure…
Added 7 hours ago
AA
Sr. Cloud Applications Engineer
Anne Arundel Dermatology
Remote, United States
- $130,000 to $155,000 USD / year
The Sr. Cloud Applications Engineer will lead the design, development, integration, and support of Azure-hosted applications and enterprise cloud services. The role is central to AAD’s…
Added 12 hours ago
NS
Endpoint Engineer III - Full-Time 1st Shift
North Shore Health Support Center
Milwaukee, WI
- Full-time
Summary/Objective: Under the supervision of the Sr. Director – IT & Security, the Endpoint Engineer III is responsible for building, standardizing, and securing the organization's endpoint
Added 12 hours ago
Sr. Director, Modern Work, Infrastructure and Operations
Par Health Enterprises LLC
Hazelwood, MO
…platforms, data center services, networks, identity and access, endpoint services, collaboration platforms, backup and recovery, monitoring, service desk, patching, automation and…
Added 13 hours ago
Sr. Security Engineer II (6836) (25k Sign-on)
MetroStar
Reston, VA
We are seeking a Sr. Security Engineer II to join our dynamic team and play a pivotal role in safeguarding our organization's digital assets and sensitive information. The ideal candidate…
Added 13 hours ago
Sr. Kubernetes Engineer II (6836) (25k Sign-on)
MetroStar
Reston, VA
We are seeking a Sr. Kubernetes Engineer II to join our dynamic team and play a pivotal role in safeguarding our organization's digital assets and sensitive information. The ideal candidate…
Added 13 hours ago
Sr. Information Systems Security Engineer (ISSE) II (6836) (25k Sign-on)
MetroStar
Reston, VA
We are seeking a Sr. Information Systems Security Engineer (ISSE) II to join our dynamic team and play a pivotal role in safeguarding our organization's digital assets and sensitive…
Added 16 hours ago
Information Systems Security Engineer - Active TS/SCI with CI Poly
ENS Solutions, LLC
Reston, VA
We are seeking a Sr. Information Systems Security Engineer (ISSE) to join our dynamic team and play a pivotal role in safeguarding our organization's digital assets and sensitive…
Added 19 hours ago
Sr. Security Engineer
Jobgether
Remote, United States
We are looking for a hands-on Senior Security Engineer to strengthen and manage the security infrastructure protecting enterprise systems, employees, and endpoints. In this role, you will…
Added 1 day ago
Sr. Network & Infrastructure Engineer - US
Kids2, LLC
Atlanta, GA
The Senior Network & Infrastructure Engineer owns the network that connects Kids2's US offices, the Suwanee data center, Azure, Hong Kong, mainland China and Mexico. This is a senior,…
Added 3 days ago
WW
Sr. Systems Engineer
World Wide Technology
Maryland Heights, MO
- $120,000 to $130,000 USD / year
…for delivery, upgrade, and security updates. As the Senior Engineer Microsoft SME, you will be responsible for creating, managing, and seamlessly delivering the Windows desktop core build…
Added 3 days ago
Sr. Security Engineer
Octus
Remote, United States
We're hiring a hands-on Senior Cybersecurity Engineer to own the security technology that protects Octus employees, endpoints, and enterprise systems. You'll keep our security stack healthy…
Added 3 days ago
M
Senior Systems Engineer – Microsoft / Endpoint
modis
Bloomington, MN
- $65 to $80 USD / hour
Akkodis is seeking a Digital Workplace Sr Engineer for a 6-month Contract with strong potential for Contract-to-Hire job with a client in Bloomington, MN. The ideal candidate will have 8+…
Added 3 days ago
Sr. Systems Engineer - CCA
TD SYNNEX CALA, Inc.
Miramar, FL
The Sr Systems Engineer – Cybersecurity is the technical lead for the CrowdStrike brand in the CCA (Caribbean Central America) region. The role owns presales engineering and architecture…
Added 3 days ago
Sr. Network & Server Engineer
Detroit Manufacturing Systems
Wixom, MI
We are seeking an experienced Senior Network and Server Engineer to design, implement, and manage the IT infrastructure supporting our automotive manufacturing operations. This role…
Added 4 days ago
Sr. Threat Detection and Incident Response Engineer
Motorola Solutions, Inc.
IL · UT · TX · MA
We are seeking a Senior Security Threat Detection and Incident Response Engineer to advance our proactive threat management capabilities and automated response posture. In this role, you…
Added 4 days ago
Sr. Software Engineer, Training/Inference (C++)
SpaceXSI
Palo Alto, CA · Seattle, WA
…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…
Added 4 days ago
Sr Palo Alto Integration Engineer
Koniag Government Services
Washington, DC
…Services company, is seeking an experienced Palo Alto Integration Engineer (Senior) to support enterprise network security operations and IT administrative and operational support services…
Added 4 days ago
Sr. CyberArk PAM & EPM Implementation Engineer or Architect
Capgemini
Atlanta, GA, GA
We are seeking an experienced Senior CyberArk PAM Implementation Engineer to assess, optimize, and enhance our existing CyberArk Privileged Access Management environment. The ideal…
Added 4 days ago
Sr. DevOps Engineer
Alteva RCM
Queens, NY
Work with IT and security on endpoint and network controls so developers can work effectively without weakening protection
Added 4 days ago
LTG - Sr Systems Engineer
LEN Lennar Corporation
Miami, FL
The Senior Endpoint Engineer leads the planning, implementation, administration, and support of enterprise endpoint management systems and virtual desktop infrastructure (VDI) serving over…
Added 4 days ago
Senior VDI Engineer - Top Secret
General Dynamics Information Technology
Arnold, MO
Deliver simple solutions to complex problems as a VDI Engineer at GDIT. Here, you'll tailor cutting-edge solutions to the unique requirements of our clients. With a career in application…
Added 4 days ago
IG
Sr Endpoint Security Engineer
Insight Global
Johnston, IA
- From $62 USD / hour
We are seeking a Senior Endpoint Security Engineer to provide technical expertise and strategic guidance across a large-scale endpoint security environment. This individual will serve as a…
Added 4 days ago
SENIOR NETWORK SECURITY ENGINEER-(REMOTE)
Compass Group
GA
The Sr. Network Security Engineer is responsible for the design, deployment, and support of the organization’s secure network access and zero trust architecture across cloud and on-premises…

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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