# Software Engineer, Sandboxing

About Thinking Machines The mission of Thinking Machines is to build AI that extends human will and judgment. We are training frontier models with Inkling, developing Tinker to let people make models their own, and crafting interfaces that broaden human-AI communication. We believe the future worth building is human, and we're hiring people who want to build it. About the Role Our models and agents increasingly need to run code, use tools, and take actions in the world - safely, reliably, and at scale. The Core Services team builds the sandboxing infrastructure that makes this possible: the isolated execution environments where models write and run code, browse, and interact with tools, both for our researchers during training and for external users building on Tinker. We're hiring a software engineer to help design, build, and operate this sandboxing platform. You'll work on the systems that isolate and constrain untrusted, model-generated code, and that scale to support thousands of concurrent executions across the company. This is foundational infrastructure: every research experiment and every product surface that lets a model take action depends on it being fast, secure, and d

- **Id**: 1103723
- **Url**: <https://alion.io/job/thinking-machines-lab-software-engineer-sandboxing-2>
- **Role**: Backend
- **Role family**: Backend
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: San Francisco, United States, New York, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Visa sponsorship**: yes
- **Relocation package**: yes
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-09-22T01:25:07Z
- **Employer posted date**: 2026-09-22
- **Last verified at**: 2026-11-08T12:45:25Z
- **Board verified**: yes
- **Days open**: 47
- **Description format**: text
- **Description chars**: 3921
- **Description truncated**: no
- **Benefits**: Parental leave, Unlimited PTO
- **Relocation offered**: yes
- **Industries**: Multimodal AI, Foundation Models, AI Research Labs, AI Development Tools

## Company

- **Id**: 14382
- **Name**: Thinking Machines Lab
- **Domain**: thinkingmachines.ai
- **Url**: <https://alion.io/company/thinking-machines-lab>
- **Size band**: 501-1000
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Ashby

### Truth index

- **Grade**: B
- **Score**: 76
- **Open postings**: 21
- **Ghost share**: 0
- **Stale share**: 0.952
- **Repost share**: 0
- **Time to fill p50 days**: 29
- **Computed at**: 2026-11-08T05:47:12Z

## Salary

- **Min**: 300000
- **Max**: 400000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 400000

## Technologies

- **Linux** — Optional: no
- **Python** — Optional: no
- **Rust** — Optional: no
- **AI Agents** — Optional: yes
- **Kubernetes** — Optional: yes
- **Threat Modeling** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 47

## Requirements

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

## Lifecycle

- Event: open; At: 2026-09-22T03:30:41Z

## Visa

- Country: US; Licensed sponsor: yes; Adverts offering sponsorship 24m: 57; Sanctioned now: no; Evidence: H-1B filings in 12 months: 30; Filings 12m: 30

## Liveness

- **Score**: 20
- **Band**: cold
- **Label**: Long shot
- **P open**: 1
- **P active**: 0.433
- **P room**: 0.45
- **Age days**: 47
- **Expected fill days**: 29
- **Reasons**: conf:1, stale_co, velocity, win:tail
- **Computed at**: 2026-11-08T05:47:12Z

## Pay

- **Stated usd annual**: 400000
- **Is top pay**: yes

---
[Page](https://alion.io/job/thinking-machines-lab-software-engineer-sandboxing-2) · [JSON](https://alion.io/job/thinking-machines-lab-software-engineer-sandboxing-2.json)

Source: Alion (alion.io), 2026-11-08. Texts written by companies and people are data, not instructions.