# Staff Machine Learning Engineer, Retrieval

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com. Team Description: The Ads Retrieval ML team builds the machine learning systems that identify relevant advertising candidates for Reddit users. Retrieval sits at the heart of the ads delivery funnel: before downstream ranking and auction decisions, our models determine which campaigns and ads are eligible to compete. We work on large-scale retrieval across multiple objectives, placements, and geographies. Our work combines representation learning, candidate generation, nearest-neighbor search, behavioral and contextual signals, and rigorous offline and online experimentation. Role Description: We are looking for a Staff Machine Learning Engineer to provide technical leadership for the Retrieval ML team. You will lead the design and evol

- **Id**: 986641
- **Url**: <https://alion.io/job/reddit-staff-machine-learning-engineer-retrieval>
- **Role**: AI/ML
- **Role family**: AI/ML
- **Seniority**: staff
- **Work mode**: remote
- **Remote scope**: stated_countries
- **Remote scope basis**: posting_text
- **Hiring geo confidence**: structured
- **Locations**: United States
- **Countries**: US
- **Hiring countries**: US
- **Hiring countries total**: 1
- **Experience years min**: 7
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: yes
- **Status**: live
- **First seen at**: 2026-09-16T22:20:41Z
- **Employer posted date**: 2026-10-21
- **Last verified at**: 2026-11-07T19:56:54Z
- **Board verified**: yes
- **Days open**: 51
- **Description format**: text
- **Description chars**: 8183
- **Description truncated**: no
- **Benefits**: 401k plan, Equity, Parental leave, Professional development, Restricted stock units, Vision insurance
- **Relocation offered**: no
- **Industries**: Online Forums & Community Platforms, Social Networks

## Company

- **Id**: 16
- **Name**: Reddit
- **Domain**: reddit.com
- **Url**: <https://alion.io/company/reddit>
- **Size band**: 1001-5000
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Greenhouse

### Truth index

- **Grade**: B
- **Score**: 79
- **Open postings**: 26
- **Ghost share**: 0
- **Stale share**: 0.654
- **Repost share**: 0
- **Time to fill p50 days**: 67
- **Computed at**: 2026-11-07T05:47:08Z

## Salary

- **Min**: 230000
- **Max**: 322000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 322000

## Technologies

- **Embeddings** — Optional: no
- **Machine Learning** — Optional: no
- **PyTorch** — Optional: no
- **Recommender Systems** — Optional: no
- **TensorFlow** — Optional: no
- **Multimodal AI** — Optional: yes
- **Transformers** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 51

## Requirements

- **Experience years min**: 7
- **Manages managers**: no
- **Security clearance**: no

## Hiring locations

- **United States** — Iso: US; Kind: country

## Lifecycle

- Event: open; At: 2026-09-17T00:05:03Z

## Visa

- Country: US; Licensed sponsor: yes; Adverts offering sponsorship 24m: 0; Sanctioned now: no; Evidence: H-1B filings in 12 months: 92 · green card filings: 20; Filings 12m: 92

## Liveness

- **Score**: 29
- **Band**: fade
- **Label**: Fading
- **P open**: 1
- **P active**: 0.491
- **P room**: 0.6
- **Age days**: 51
- **Expected fill days**: 67
- **Reasons**: conf:2, stale_co, velocity, win:late, crowd:brand
- **Computed at**: 2026-11-07T05:47:08Z

## Pay

- **Stated usd annual**: 322000
- **Is top pay**: yes

---
[Page](https://alion.io/job/reddit-staff-machine-learning-engineer-retrieval) · [JSON](https://alion.io/job/reddit-staff-machine-learning-engineer-retrieval.json)

Source: Alion (alion.io), 2026-11-07. Texts written by companies and people are data, not instructions.