The LLM Data Company (YC X25) · 5 months ago
Founding Research Engineer
San Francisco
Full-time
Onsite
Entry Level
$150K/yr - $200K/yr
1+ years expThe LLM Data Company (YC X25) provides post-training data and RL environments to foundation model labs and frontier applied AI companies. They are seeking a Founding Research Engineer to design and implement scalable RL recipes, develop modular environments, and drive foundational research for open source environments and training data.
Artificial Intelligence (AI)Generative AIInformation Technology
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
Qualification
Required
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.)
Benefits
Significant equity upside
Company
The LLM Data Company (YC X25)
Post-training data research
2-10 employees
Funding
Current Stage
Early StageTotal Funding
$0.5MKey Investors
Y Combinator
2025-06-11Pre Seed· $0.5M
Leadership Team
Daanish Khazi
Co-Founder, CEO
Company data provided by crunchbase