The LLM Data Company (YC X25) · 5 months ago
Founding Senior Research Engineer
San Francisco
Full-time
Onsite
Mid, Senior Level
$200K/yr - $275K/yr
3+ years expThe LLM Data Company, a rapidly growing startup, is seeking a Founding Senior Research Engineer to contribute to cutting-edge research in post-training data and reinforcement learning environments. The role involves designing scalable RL recipes, developing modular environments, and collaborating with product teams to create user-friendly interfaces for data generation.
Artificial Intelligence (AI)Generative AIInformation Technology
No H1B
U.S. Citizen Only
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
Master or PhD 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.)
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