# Software Engineer, ML Infrastructure

Role Overview We are hiring a Founding ML Infrastructure Engineer to own the end-to-end deployment, optimization, and operation of our suits of models in production. This is a core founding role focused on building and operating production-grade LLM systems. You will apply deep knowledge of model internals to deploy, optimize, and run modern LLMs at scale, owning performance end-to-end across latency, throughput, and reliability. You will design and operate the full ML serving stack from model artifacts to GPU execution, and work closely with Product and ML teams to ensure our models can support high QPS, strict SLAs, and production correctness. This role is ideal for someone who deeply understands how LLMs work internally, but chooses to specialize in making them fast, stable, and production-ready. About Realm Labs Realm Labs is an AI trust and security startup. We help enterprises detect, debug, and prevent AI’s misbehaviors in production. We are backed by top VCs and serve some of the most iconic global enterprises. Key Responsibilities Own the end-to-end LLM inference stack, including:Model loading and execution GPU utilization and memory efficiency Runtime performance tuning P

- **Id**: 1270716
- **Url**: <https://alion.io/job/realm-labs-software-engineer-ml-infrastructure>
- **Role**: AI/ML
- **Role family**: AI/ML
- **Seniority**: senior
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Sunnyvale, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 5
- **Visa sponsorship**: yes
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-01-16T21:45:33Z
- **Employer posted date**: 2026-01-19
- **Last verified at**: 2026-11-11T03:55:03Z
- **Board verified**: yes
- **Days open**: 298
- **Description format**: text
- **Description chars**: 4187
- **Description truncated**: no
- **Benefits**: Equity, Life insurance
- **Relocation offered**: no
- **Industries**: AI Safety & Alignment, AI Evaluation & Observability

## Company

- **Id**: 2203168
- **Name**: Realm Labs
- **Domain**: realmlabs.ai
- **Url**: <https://alion.io/company/realmlabs>
- **Size band**: 11-50
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Gem

### Truth index

- **Grade**: B
- **Score**: 75
- **Open postings**: 3
- **Ghost share**: 0
- **Stale share**: 1
- **Repost share**: 0
- **Computed at**: 2026-11-11T05:49:22Z

## Salary

- **Min**: 180000
- **Max**: 250000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 250000

## Technologies

- **KV Cache** — Optional: no
- **Linux** — Optional: no
- **LLM** — Optional: no
- **PyTorch** — Optional: no
- **SGLang** — Optional: no
- **TensorFlow** — Optional: no
- **TensorRT** — Optional: no
- **TensorRT-LLM** — Optional: no
- **Transformers** — Optional: no
- **Triton Inference Server** — Optional: no
- **vLLM** — Optional: no
- **CUDA** — Optional: yes
- **Kubernetes** — Optional: yes
- **NCCL** — Optional: yes

## Trust

- **Level**: stale
- **Repost count**: 0
- **Flags**: stale
- **Days open**: 298

## Requirements

- **Experience years min**: 5
- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-09-25T23:59:00Z

## Visa

- Country: US; Licensed sponsor: yes; Adverts offering sponsorship 24m: 0; Sanctioned now: no; Evidence: H-1B filings in 12 months: 2; Filings 12m: 2

## Liveness

- **Score**: 8
- **Band**: cold
- **Label**: Long shot
- **P open**: 1
- **P active**: 0.268
- **P room**: 0.28
- **Age days**: 298
- **Expected fill days**: 32
- **Reasons**: conf:1, win:tail, crowd:
- **Computed at**: 2026-11-11T05:49:22Z

## Pay

- **Stated usd annual**: 250000
- **Is top pay**: yes

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