a16z portfolio
Labelbox
RL data engine for frontier AI labs: environments, preference signals, and evaluation infrastructure for post-training reasoning, tool use, and agent coding models.
10 open roles
Frontier Data Lead
Senior Accounts Receivable Analyst
Recruiting Operations Specialist (Contract)
Member of Technical Staff
Global Specialized Domain Expert Recruiter (Contractor)
Staff ML Engineer, Agent Training & Environments
Managing Partner
Forward Deployed Engineering Manager
Forward Deployed Research Scientist
Forward Deployed Engineer, RL Environments