Member of Technical Staff, Post-Training, RL Environments at Mirendil

Mirendil is hiring a Research Engineer to build and own the data systems and execution environments that power reinforcement learning. The role includes automating data collection for long-horizon RL tasks, preventing reward hacking, creating scalable sandboxed environments for multi-agent, multi-node, and multi-user tasks, estimating how training environments affect production model behavior, and collaborating with cross-functional teams to improve model performance. The position offers a base salary of $300,000–$400,000 USD and a meaningful equity grant, along with competitive benefits.