# Software Engineer, RL Environments

About the Role Join a Series A AI training data company building datasets and evaluation systems for frontier models. You will work with research teams to design experiments, identify model failure modes, and create data and metrics that inform model training. What You'll Do Design data slices across finance, software development, and enterprise workflows to reveal meaningful model failure modes. Build and refine evaluation rubrics and reward signals for RLHF and RLVR pipelines. Model annotator behavior and run experiments to improve model capabilities. Develop quantitative frameworks to measure dataset quality, diversity, and downstream effects on model alignment and capability. Create and manage real-world and synthetic data pipelines. Partner with research teams to translate training objectives into concrete data and evaluation specifications. What We're Looking For 1 to 4 years of software engineering experience building reliable data pipelines, experimentation infrastructure, or evaluation systems. Strong Python skills and experience shipping software and infrastructure. Hands-on experience with LLM evaluations, model post-training, reward modeling, RLHF, RLVR, or rela

- **Id**: 4321064
- **Url**: <https://alion.io/job/true-talent-solutions-partners-software-engineer-rl-environments-5>
- **Role**: Backend
- **Role family**: Backend
- **Seniority**: junior
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: San Francisco, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 1
- **Visa sponsorship**: yes
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-14T17:38:20Z
- **Employer posted date**: 2026-11-14
- **Last verified at**: 2026-11-14T20:25:10Z
- **Board verified**: yes
- **Days open**: 0
- **Description format**: text
- **Description chars**: 1831
- **Description truncated**: no
- **Relocation offered**: no

## Company

- **Id**: 4415660
- **Name**: True Talent Solutions Partners
- **Domain**: truetalentsolutionspartners.com
- **Url**: <https://alion.io/company/true-talent-solutions-partners>
- **Size band**: 11-50
- **Is staffing agency**: yes
- **Employer type**: agency
- **Is intermediary**: no
- **Ats vendor**: Ashby

## Salary

- **Min**: 260000
- **Max**: 290000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 290000

## Technologies

- **LLM** — Optional: no
- **Machine Learning** — Optional: no
- **Post-training** — Optional: no
- **Python** — Optional: no
- **Reward Modeling** — Optional: no
- **RLHF** — Optional: no
- **Synthetic Data** — Optional: no

## Trust

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

## Requirements

- **Experience years min**: 1
- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-11-14T20:25:10Z

## Visa

- Country: US; Licensed sponsor: no; Adverts offering sponsorship 24m: 89; Sanctioned now: no; Evidence: Offered visa sponsorship in 89 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**: 4
- **Reasons**: conf:1, agency, win:early, comp:junior,brand
- **Computed at**: 2026-11-14T22:10:39Z

## Pay

- **Stated usd annual**: 290000
- **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.