Mechanize builds RL environments that frontier AI labs use to train their models on real-world software engineering. Team of ~20. High demand and hiring quickly. Backed by Nat Friedman, Daniel Gross, and Patrick Collison. Applying takes <2 min: http…

Surge AI is hiring senior engineers and other roles to build human infrastructure for AI and LLMs. They operate a large human data platform and work on RL environments, agentic workflows, and RLHF data collection (examples: GSM8K dataset, Anthropic …