Founding Product Engineer

About the role

About Interfere

Interfere is building the self-healing layer of the internet: software that detects broken product experiences, understands what caused them, and helps teams fix them before users notice. Modern teams have logs, dashboards, traces, and session replay. They still find out about too many problems from their users. We exist to close that gap for engineers, PMs, designers, and founders who care how their product actually works in the real world. The product surface is large. The category is still being defined. The people who join now will shape the standards and the operating system of the company. We've raised $5.1M from Y Combinator, Vercel Ventures, Hummingbird, Designer Fund, and others. We're in person in New York City.

The Role

You will own end-to-end features, from data model to interface, that define how the best teams understand and fix their products. You'll architect core systems, design the surfaces engineers actually use, and decide what "excellent" means for a category that doesn't exist yet.

What you'll build and own

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Detection and diagnosis systems that reason about codebases and runtime behavior at scale

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Developer-facing interfaces that make complex system failures legible in seconds

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Pipelines that ingest, structure, and correlate billions of product events

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Agentic workflows that triage issues and propose or ship fixes safely

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APIs and integrations that meet developers inside the tools they already use

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The internal standards (for code, design, and judgment) that the next ten engineers will inherit

What we're looking for

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You've shipped production software that real users depend on, end to end, across the stack.

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You move comfortably between frontend behavior, backend systems, and the seams between them.

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You can take an ambiguous product or infrastructure problem, define the next useful step, and ship without waiting for a fully specified plan.

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You can explain complex system behavior clearly enough that engineers, designers, and PMs can make the right decision quickly.

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You are willing to stay with hard problems long enough to understand them deeply, not just route around them.

Nice to have

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You are fluent in TypeScript and modern web tooling (Next.js, React, Node).

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Worked on developer tools, observability, incident response, or session replay

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Built or operated systems handling high-throughput event data

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Shipped agentic or LLM-powered features into production

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Distributed systems depth, or strong eye for product and UI craft (either is a strong asset; both is rare and valuable)