# Performance Engineer (Inference, Training & GPU)

About World Labs World Labs is a frontier AI research and product company advancing spatial intelligence, the next frontier beyond large language models. Co-founded by Dr. Fei-Fei Li, Justin Johnson and Ben Mildenhall, the company is pioneering world models that perceive, generate, reason, and interact with virtual and physical worlds. The company’s flagship product, Marble, transforms text, images, and video into fully navigable 3D worlds, unlocking applications across gaming, film, architecture, robotics, and immersive digital experiences. Backed by leading investors and with over $1B raised, World Labs is assembling a world-class team at the intersection of AI research and real-world deployment. Role Overview We are looking for a Performance Engineer to make World Labs’ models train and serve as fast as the hardware allows. Running large generative world models at scale is a novel systems problem. You will find the bottlenecks - in kernels, in the serving path, in the training loop, in how we use our GPUs - and eliminate them. Your ownership is technical and concrete: the throughput you unlock, the latency you cut, the utilization you win back, and the correctness you hold while

- **Id**: 948549
- **Url**: <https://alion.io/job/world-labs-performance-engineer-inference-training-gpu-2>
- **Role**: AI/ML
- **Role family**: AI/ML
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: San Francisco, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Visa sponsorship**: yes
- **Relocation package**: yes
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-05-01T17:02:32Z
- **Employer posted date**: 2026-05-01
- **Last verified at**: 2026-11-12T22:32:18Z
- **Board verified**: yes
- **Days open**: 195
- **Description format**: text
- **Description chars**: 6307
- **Description truncated**: no
- **Benefits**: 401k plan, Parental leave
- **Relocation offered**: yes
- **Industries**: Generative 3D, Foundation Models, AI Research Labs

## Company

- **Id**: 43961
- **Name**: World Labs
- **Domain**: worldlabs.ai
- **Url**: <https://alion.io/company/world-labs>
- **Size band**: 201-500
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Ashby

### Truth index

- **Grade**: A
- **Score**: 95
- **Open postings**: 8
- **Ghost share**: 0
- **Stale share**: 0
- **Repost share**: 0
- **Time to fill p50 days**: 208
- **Computed at**: 2026-11-12T10:38:37Z

## Salary

- **Min**: 200000
- **Max**: 300000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 300000

## Technologies

- **C++** — Optional: no
- **CUDA** — Optional: no
- **JAX** — Optional: no
- **Prompt Caching** — Optional: no
- **Python** — Optional: no
- **PyTorch** — Optional: no
- **Quantization** — Optional: no
- **Rust** — Optional: no
- **Triton** — Optional: no
- **World Models** — Optional: no
- **XLA** — Optional: no
- **AWS Trainium** — Optional: yes
- **NCCL** — Optional: yes
- **NVLink** — Optional: yes
- **TPU** — Optional: yes

## Trust

- **Level**: ok
- **Repost count**: 0
- **Days open**: 194

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-09-15T22:36:32Z

## Visa

- Country: US; Licensed sponsor: yes; Adverts offering sponsorship 24m: 8; Sanctioned now: no; Evidence: H-1B filings in 12 months: 7; Filings 12m: 7

## Liveness

- **Score**: 40
- **Band**: fade
- **Label**: Fading
- **P open**: 1
- **P active**: 0.672
- **P room**: 0.6
- **Age days**: 194
- **Expected fill days**: 208
- **Reasons**: conf:1, win:late, crowd:
- **Computed at**: 2026-11-12T10:38:37Z

## Pay

- **Stated usd annual**: 300000
- **Is top pay**: yes

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Source: Alion (alion.io), 2026-11-13. Texts written by companies and people are data, not instructions.