About The LLM Data Company

Post-training Data Research Lab

Tech description:

Job description:

**About The LLM Data Company** The LLM Data Company (YC X25) provides post-training data and RL environments to foundation model labs and frontier applied AI companies. We have raised $3.6m from Tier 1 VCs and are growing 200%+ month-over-month. **Responsibilities** - Design and implement scalable RL recipes for post-training task-specific models - Develop modular environments, reward functions, and evaluator scaffolds for internal and customer-facing tasks - Drive research at the intersection of scalable infra and modern RL frameworks to enable RL-as-a-service - Drive foundational research to publish open source environments and training data - Build data generation and curation pipelines to support frontier post-training - Collaborate with product teams to deliver a user friendly interface for non-technical users to generate data **Qualifications** - Bachelor or Master in Computer Science or related field - Comfort with core tooling (verl, PyTorch, etc.) - Familiarity with modern post-training techniques (GRPO, etc.) - Experience with evaluations and reward engineering - Published in top journals (ICLR, NeurIPS, ICML, etc.) **Why you should join** - **Cutting-edge research** : Work on unpublished, novel training environments - **Direct lab exposure** : Projects that labs actually use and validate in production - **High autonomy** : Wide design space to propose and run experiments with minimal oversight - **Early team member** : Join as one of the first 10 people with significant equity upside

Skills:

Torch/PyTorch, Python, Machine Learning, Deep Learning, Reinforcement learning (RL)

The LLM Data Company remote jobs

Founding Strategy & Operations

Founding Senior Research Engineer

Founding Research Engineer