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Associate Electrical Engineer
Leviton Manufacturing
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At Leviton, we build what's next to light, power, and connect everyday spaces, from electrical to lighting, to data networks, and energy management. With over 115 years of history, Leviton…
Added 1 min ago
Cloud Engineer (Senior)
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Herndon, VA
Ability to write Python scripts to automate tasks, such as data processing, file management and system administration
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RH
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Added 7 mins ago
Engineer - Vehicle Flight Control & Inertial Navigation Systems
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…measurements and recording observations, collecting, compiling, and processing data; may include planning/designing experiments or tests and supervising the execution…
Added 8 mins ago
Data Engineer
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Added 11 mins ago
TT
Founding Backend Software Engineer
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Added 12 mins ago
Systems Engineer (Mission and Requirements)
Arcfield
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Arcfield is seeking an experienced Mission / Systems Engineer to support the development and integration of advanced space-based sensing and mission capabilities supporting US Space Force…
Added 12 mins ago
Systems Engineer (Architecture & Solutioning)
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Work across multidisciplinary technical domains including space, ground, communications, sensing, mission processing, data, and operations.
Added 12 mins ago
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Distinguished, Software Engineer
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…managing a cart through checkout, payment selection, tender processing, and successful order…
Added 15 mins ago
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Part-Time Mission Analysis Engineer - Millennium Space Systems
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- $21.15 to $30.77 USD / hour
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Added 16 mins ago
Sr. Model Engineer, RL Training Framework
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The RL infrastructure team is looking for an engineer to help develop our RL training framework.
Added 17 mins ago
Piping/Mechanical Field Engineer - Sparks, NV
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Added 22 mins ago
Mid-Level Manufacturing Engineer
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FALCATA Production Division is looking for a Mid-Level Manufacturing Engineer, based in Huntsville, AL (Discovery). This group provides products and services in the areas of radar,…
Added 23 mins ago
Manufacturing Electrical Engineer
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Added 25 mins ago
Senior Associate Software Engineer
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9. Strong SQL, data-analysis, batch-processing, and troubleshooting skills.
Added 34 mins ago
Scrum Master – Senior Software Engineer
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Experience on XBR, AN/TPY-2, COBRA DANE, QEWR, UEWR, SRP or radar data processing domain knowledge.
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Scrum Master –Software Engineer II
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Added 36 mins ago
3rd Shift Etch Process Support Engineer
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An exciting opportunity exists at Raytheon to join our process support team as a 3rd Shift Etch Process Support Engineer. This role involves working with gallium arsenide, gallium nitride,…
Added 36 mins ago
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…executing corrective actions within the sensor, sensor biasing, data screening/QC, raw sensor data dissemination to external…
Added 36 mins ago
Software Quality Engineer onsite Woburn, MA
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Our team in Woburn has an immediate need for a Software Quality Engineer for the Strategic Upper Tier Missile Defense Agency/Sensors & Precision Strike (SSPS) section within the Air & Space…
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Electrical Engineering Intern (Summer 2027)(Onsite)
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…our nation, such as sophisticated software-defined radios and data links designed for use in ground, airborne, and space…
Added 38 mins ago
Software Engineer Senior
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As a Software Engineer Senior at GDIT, you will design, develop, integrate, and sustain secure software applications and data-driven solutions that support complex mission requirements.…
Added 39 mins ago
Data Engineer
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…intelligence means that there’s more structured and unstructured data available today than ever before. As a data engineer, you know that organizing data can yield pivotal insights when…
Added 39 mins ago
Embedded FPGA Engineer
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Added 40 mins ago
Software Engineer II - AI Platforms
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…integration patterns that let AI models, agents, tools, enterprise data, and services run safely and observably in customer-facing products. You'll work with senior engineers, AI Engineers,…

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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