Founding Product Engineer

Interfere•New York, NY

105d•$150,000 - $250,000•Onsite

About The Position

Interfere is building software that detects broken product experiences, identifies their causes, and helps teams resolve them before users notice. The Founding Product Engineer will own end-to-end features, from data model through interface, that help teams understand and fix their products. The role includes architecting core systems, designing developer-facing product surfaces, and establishing standards for a new product category and for future engineering hires. The engineer will build detection and diagnosis systems for codebases and runtime behavior, interfaces that make complex failures clear, pipelines for ingesting and correlating large volumes of product events, agentic workflows for issue triage and fixes, and APIs and integrations. Interfere works in person in New York City and emphasizes speed, clear writing, ownership, high standards, and thoughtful disagreement. The company has raised $5.1 million from Y Combinator, Vercel Ventures, Hummingbird, Designer Fund, and others. Compensation includes founding-team equity and competitive cash compensation, with specific ranges shared during the first conversation. Visa sponsorship is available for exceptional international candidates, and the company will help the hire move to New York.

Requirements

Have shipped production software used by real users, end to end and across the stack.
Be comfortable working across frontend behavior, backend systems, and the connections between them.
Be able to define and ship a useful next step for ambiguous product or infrastructure problems without waiting for a fully specified plan.
Explain complex system behavior clearly so engineers, designers, and product managers can make decisions quickly.
Be willing to investigate difficult problems in depth.

Nice To Haves

Fluency in TypeScript and modern web tooling such as Next.js, React, and Node.
Experience with developer tools, observability, incident response, or session replay.
Experience building or operating systems that handle high-throughput event data.
Experience shipping agentic or LLM-powered features into production.
Depth in distributed systems, or strong product and UI craft; both are especially valuable.
A product, tool, or system built that other engineers chose to use.
Open-source work, technical writing, or research demonstrating depth.
Experience taking on more scope than a prior job title suggested.
Experience starting something from zero, such as a company, team, or product line.
Ability to pick up an unfamiliar domain quickly and ship effectively.
A portfolio piece demonstrating strong taste in code, product, or writing.

Responsibilities

Own end-to-end product features, from data model to interface.
Architect core systems and design interfaces used by engineers to understand and fix products.
Build detection and diagnosis systems that reason about codebases and runtime behavior at scale.
Create developer-facing interfaces that make complex system failures understandable quickly.
Build pipelines to ingest, structure, and correlate product events.
Develop agentic workflows to triage issues and propose or safely ship fixes.
Build APIs and integrations that fit into developers’ existing tools.
Establish internal standards for code, design, and engineering judgment for future hires.