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AI Engineer

MastraRemoteEngineering
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Experience
Mid
Posted
7 Oct 2026
Status
Open · checked 7d ago

About this role

The AI Engineer position at Mastra is a fully remote role focused on building features for agent trace intelligence, evaluations, and learning capabilities, making it a strong fit for engineers experienced with production AI agents. This hands-on developer position suits professionals who enjoy moving between experimentation, benchmarking, and product implementation to improve agent frameworks.

Role Overview

The AI Engineer will work on systems that help developers understand agent behavior, evaluate performance, and drive continuous improvements. The role involves turning insights from agent evaluations into core framework capabilities.

Key Responsibilities

Build tools for understanding traces, evaluating agent behavior, and turning results into improvements
Run experiments on framework primitives to identify performance strengths and weaknesses
Use evaluation findings to improve primitive configuration and behavior
Transform experimental work into features that developers can integrate into their applications

Requirements

Experience shipping agents and agentic applications into production
Background in tuning and tweaking agents to improve accuracy
Ability to benchmark results against existing datasets or create them intelligently

Skills and Tools

TypeScript
AI agents and frameworks
Benchmarking tools
Trace intelligence and evaluation systems

About the Company

Mastra is the open-source TypeScript framework for building AI agents, created by the team behind Gatsby. The company is backed by Y Combinator and Spark Capital, has raised thirty-five million dollars in total funding, and reached over twenty-seven thousand GitHub stars and one million weekly npm downloads in under eighteen months. Operating as a small, fast-shipping, fully remote team, members primarily work across North American and European time zones.

How to Apply

Interested candidates should apply on the official company careers page.

Skills and tech stack

Questions candidates ask

Where is the AI Engineer position located?

The role is fully remote, with team members primarily working across North American and European time zones.

What will I be building in this role?

You will build features that help developers understand agent behavior, evaluate performance, and improve agents over time, including trace intelligence and agent learning features.

What background is required for this position?

Candidates must have experience shipping agents and agentic applications into production, tuning them for accuracy, and benchmarking results against existing or newly created datasets.

What technology stack does Mastra use?

Mastra is an open-source TypeScript framework for building AI agents.

What is Mastra's company background?

Mastra was built by the team behind Gatsby, backed by Y Combinator and Spark Capital with thirty-five million dollars raised, and achieved over twenty-seven thousand GitHub stars and one million weekly npm downloads in under eighteen months.

Ready to apply?

The application is on the official Mastra careers page.

Apply on company site