Senior Backend Engineer (Remote) for AI RL Environments

YO AI Labs is seeking a Senior Software Engineer to support an AI training project by creating reinforcement learning environments that evaluate AI models on complex software tasks using MCP tools. Remote contractor role (~15 hours/week).You will design reproducible environments, deterministic verification, and reference solutions for tasks such as bug fixing, feature implementation, codebase refactoring, and performance optimization. No prior AI experience required.