# Machine Learning Research Engineer

About the company Our client is a software company. The role Raydar is recruiting for this role on behalf of our client. Drive applied machine learning research on language models, moving from an initial question through experimentation to a model ready for real-world use. This is an early technical position with close collaboration alongside company leadership, engineers and clients. What you'll do - Convert client workflows and observed model shortcomings into focused research questions, evaluation suites and experiments. - Create training datasets, reward functions and automated checkers, and run fine-tuning, preference-based and reinforcement learning experiments. - Investigate failed training runs and rely on ablation studies and held-out testing to learn which changes truly raise quality. - Lead projects from start to finish, ending with a deployed model or a publishable result. - Collaborate with fellow researchers and infrastructure engineers to ship successful models and study how they behave live. Requirements What we're looking for - Significant practical background in adapting language models after pretraining, with personal accountability for experiments and their outc

- **Id**: 4319902
- **Url**: <https://alion.io/job/raydar-machine-learning-research-engineer-4>
- **Role**: AI/ML
- **Role family**: AI/ML
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Mountain View, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-14T19:11:51Z
- **Employer posted date**: 2026-11-14
- **Last verified at**: 2026-11-14T19:11:51Z
- **Board verified**: yes
- **Days open**: 0
- **Description format**: text
- **Description chars**: 2324
- **Description truncated**: no
- **Benefits**: Equity
- **Relocation offered**: no

## Company

- **Id**: 4478753
- **Name**: Raydar
- **Domain**: raydar.com
- **Url**: <https://alion.io/company/raydar-com>
- **Size band**: 51-200
- **Is staffing agency**: yes
- **Employer type**: agency
- **Is intermediary**: no
- **Ats vendor**: Workable

### Truth index

- **Grade**: B
- **Score**: 75
- **Open postings**: 19
- **Ghost share**: 0
- **Stale share**: 1
- **Repost share**: 0
- **Time to fill p50 days**: 23
- **Computed at**: 2026-11-14T05:58:10Z

## Salary

- **Min**: 200000
- **Max**: 350000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 350000

## Technologies

- **Fine-tuning** — Optional: no
- **Machine Learning** — Optional: no
- **Python** — Optional: no
- **PyTorch** — Optional: no
- **Reinforcement Learning** — Optional: no

## Trust

- **Level**: ok
- **Days open**: 0

## Requirements

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

## Hiring locations

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

## Lifecycle

- Event: open; At: 2026-11-14T19:11:51Z

## Visa

- Country: US; Licensed sponsor: no; Adverts offering sponsorship 24m: 32; Sanctioned now: no; Evidence: Offered visa sponsorship in 32 of its adverts here in 24 months; Filings 12m: 0

## Liveness

- **Score**: 52
- **Band**: ok
- **Label**: Likely open
- **P open**: 1
- **P active**: 0.516
- **P room**: 1
- **Age days**: 0
- **Expected fill days**: 23
- **Reasons**: conf:4, agency, win:early, comp:brand
- **Computed at**: 2026-11-14T23:34:14Z

## Pay

- **Stated usd annual**: 350000
- **Is top pay**: yes

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Source: Alion (alion.io), 2026-11-14. Texts written by companies and people are data, not instructions.