What a Product Engineer Is Here

A decent amount of digital ink has been spilled already on what a product engineer is, but we think that a product engineer focuses on outcomes (and speed towards outcomes) rather than on implementation and process. By contrast, great platform engineers do tend to think about implementation and process (and keeping production up and running requires both). It takes both to ship great software, but we’re looking specifically for a product engineer to join our team.

This is a high-agency role. We expect that a product engineer can take a vague problem and a clear one alike and get a feature shipped. Our product engineers ship open-source features in our framework. They stand up new services on the platform. They triage incoming issues. They move fast and they're willing to break things (but they have the judgment to keep the blast radius small and quickly fix what they break).

It shouldn't surprise you that we lean hard on agent-driven development; we even built our own coding harness. We're constantly trying the newest tools and workflows to see what actually moves velocity and quality, and we're not shy about dropping the ones that don't.

If you want to see the kind of work this role does, look at recent releases like Automatic Deploys, Agent Builder, and Observability. Better yet, build an agent with Mastra and deploy it, and get a sense of the product for yourself.

What You'll Do

Ship features, fixes, and improvements that make the product better.
Work with founders, customers, and teammates to find the shape of the most important problems, and then ship, test, and launch solutions.
Point a fleet of agents at the biggest problems and guide them through to working software.
Open a code editor when the work calls for it.
Be a great teammate: review PRs, give feedback on plans and architecture sketches, and share tricks for squeezing more quality out of the latest models.
Help shape weekly priorities and contribute ideas to org-wide retros.
Take ownership without being asked: plan your own projects, address bot review feedback, jump into customer channels to solve problems, and bring demos to Friday demo day.

About You

Some things that are probably true about you:

You've owned features end-to-end and love hearing from customers.
You're a full-stack engineer, as comfortable shipping a V0 frontend as writing a database migration.
You're comfortable enough in a cloud environment (we run on Google Cloud and Railway) to ship a feature that touches Kubernetes.
You're not afraid to move quickly and break things (but you're quick to fix them).
You've shipped production code and owned the outcome.

Our stack, if it helps you picture it: TypeScript and Node throughout, Postgres, Redis, ClickHouse, on Google Cloud and Railway.

Not a Good Fit If

You need a full spec handed to you before you'll start.
Your reflex when a decision is unclear is "that's a product decision" and then you wait.
You're pessimistic about how AI is changing software engineering.
Multiple, shifting priorities running in parallel are hard or frustrating for you.

Location & Time Zones

Mastra is fully remote, and this role is open to candidates in the AMER time zones. We run one-week sprints — plan on Monday, demo on Friday — and we value deep focus and async communication, with enough overlap to stay aligned on what matters.

Would you like me to also prepare a engineering role template version of this so you can reuse the structure for other technical postings?

Microsoft Advertising

Jira is often used by product engineers to track features and issues efficiently, helping teams move fast while keeping projects organized—especially useful in high-agency development roles.

Jira™ Official Site - Try Jira™ for Free

Product Engineer