# LLM Data Researcher

About the Role Join an early-stage research team at a European AI data company and investigate whether expert-generated data improves language model performance. You will conduct hands-on research, build evaluation infrastructure, and help determine which research and data initiatives to pursue. What You'll Do Post-train language models on expert datasets and measure their impact, investigating when results fall short. Design and run evaluations of frontier language models in expert domains. Select and execute suitable training methods, including supervised fine-tuning, reinforcement learning, and preference tuning. Translate research findings into dataset specifications and recommendations for future work. Publish research papers, benchmarks, and written research updates. Coordinate research findings with data, client, partnership, and marketing teams. What We're Looking For Hands-on research experience with reinforcement learning environments for language models or RL-based post-training, such as RLHF, RLVR, reward modeling, or preference optimization. A completed or nearly completed PhD in machine learning or NLP, or an equivalent research record demonstrated through publ

- **Id**: 4277330
- **Url**: <https://alion.io/job/clera-llm-data-researcher>
- **Role**: AI/ML
- **Role family**: AI/ML
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Barcelona, Spain
- **Countries**: ES
- **Hiring countries total**: 0
- **Visa sponsorship**: yes
- **Relocation package**: yes
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-13T17:02:16Z
- **Employer posted date**: 2026-11-13
- **Last verified at**: 2026-11-14T19:35:39Z
- **Board verified**: yes
- **Days open**: 1
- **Description format**: text
- **Description chars**: 1781
- **Description truncated**: no
- **Benefits**: Equity
- **Relocation offered**: yes

## Company

- **Id**: 2706
- **Name**: Clera
- **Domain**: getclera.com
- **Url**: <https://alion.io/company/clera>
- **Size band**: 11-50
- **Is staffing agency**: yes
- **Employer type**: agency
- **Is intermediary**: no
- **Ats vendor**: Ashby

### Truth index

- **Grade**: B
- **Score**: 80
- **Open postings**: 40
- **Ghost share**: 0
- **Stale share**: 1
- **Repost share**: 0
- **Time to fill p50 days**: 6
- **Computed at**: 2026-11-14T05:58:10Z

## Technologies

- **Machine Learning** — Optional: no
- **NLP** — Optional: no
- **Post-training** — Optional: no
- **Reinforcement Learning** — Optional: no
- **Reward Modeling** — Optional: no
- **RLHF** — Optional: no
- **SFT** — Optional: no

## Trust

- **Level**: ok
- **Days open**: 1

## Requirements

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

### Education

- **Level**: phd
- **Optional**: no

## Hiring locations

- **Spain** — Iso: ES; Kind: country

## Lifecycle

- Event: open; At: 2026-11-13T19:23:38Z

## Visa

- Country: ES; Licensed sponsor: no; Adverts offering sponsorship 24m: 2; Sanctioned now: no; Evidence: Offered visa sponsorship in 2 of its adverts here in 24 months; Cap exempt: no

## Liveness

- **Score**: 38
- **Band**: fade
- **Label**: Fading
- **P open**: 1
- **P active**: 0.379
- **P room**: 1
- **Age days**: 0
- **Expected fill days**: 6
- **Reasons**: conf:0, agency, stale_co, velocity, win:early, comp:brand
- **Computed at**: 2026-11-14T05:58:10Z

---
[Page](https://alion.io/job/clera-llm-data-researcher) · [JSON](https://alion.io/job/clera-llm-data-researcher.json)

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