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Mastra

AI Engineer

Mastra

. Build features for understanding traces, evaluating agent behavior, and turning evaluation results into improvements .

Posted 10/7/2026full-timeRemote • United StatesMid-LevelSeniorWebsite

About the role

Key responsibilities & impact
  • Build features for understanding traces, evaluating agent behavior, and turning evaluation results into improvements
  • Run experiments on Mastra’s primitives
  • Investigate where primitives perform well and where they fall short
  • Improve primitive configuration and behavior based on findings
  • Turn evaluation work into capabilities developers can use in their applications
  • Work on features including trace intelligence, agent learning, autoevaluations, suggestions, and rollouts

Requirements

What you’ll need
  • Shipped agents and agentic applications into production
  • Tuned and tweaked agents to improve accuracy
  • Ability to benchmark results against existing datasets or intelligently create datasets
  • Hands-on engineering experience spanning experiments, benchmarks, and product code

Benefits

Comp & perks
  • Fully remote work
  • Work across North American and European time zones