Remote Senior Backend Engineer - AI RL Environments

YO AI Labs is seeking Senior Software Engineers on a contractor basis to build reinforcement learning environments for evaluating AI models on software tasks using MCP tools. You will create reproducible environments, verification systems, and reference solutions for bug fixing, feature work, refactoring, and performance tuning.

The role focuses on software engineering challenges with no requirement for prior AI experience. Remote work is available as a contractor role (~15 hours/week).