Product Engineer (UI-Focused)

Role Description

We're looking for a UI-focused product engineer to join the Horizon team and own how users experience an enterprise-grade MCP gateway. Horizon helps teams deploy, govern, and scale MCP servers. The buyers showing up today are security-minded and platform-minded enterprises who care about access control, auditability, and keeping sensitive data safe.

This is a UI-focused, front-end-leaning full-stack role. Your strength is the product surface:

• Deep front-end craft plus strong opinions about how users interact with the product
• User flows and information architecture
• Web app experience, and the framework and underlying technologies

We're explicitly not hiring a stylist or a pure UX researcher. We're hiring an engineer who understands the underlying technology well enough to guide AI tools rather than rely on them for technical judgment, and who can turn complex governance concepts into something legible and intuitive.

You'll own features end-to-end, from the user problem to the flow and information architecture, to a polished, shipped experience backed by solid full-stack implementation. You'll be a thought partner to the rest of the Horizon team:

• Two engineers will share this profile so the product surface is never owned by someone working alone
• Bounce ideas around, reinforce hypotheses, and set the bar for how Horizon feels

You'll report to Eddie (Edward Park), Director of Engineering for Horizon, and partner directly with our CEO, GtM partners, and early customers to turn field signal into working software fast.

Qualifications

• 5+ years of full-stack engineering experience with a front-end focus, and demonstrated success shipping user-facing products people find intuitive
• Track record of shipping in high-ambiguity, early-stage environments without a dedicated PM or design team
• Deep front-end craft: strong proficiency in TypeScript, React, and modern UI libraries (e.g. TanStack)
• Strong product and UX judgment
• Comfortable across the full stack, with your energy on the product surface
• Experience building with, or genuine interest in, the Model Context Protocol (MCP) and AI/LLM tooling
• Self-directed with strong judgment and clear communication
• Real fluency with AI development tools
• A formal design background is not required

Requirements

• Own end-to-end UI and product features in Horizon — from user problem to information architecture to shipped, polished experience
• Set the bar for how users interact with Horizon — the web app experience, the flows, and how complex governance concepts are made legible
• Bring deep front-end craft — TypeScript, React, and the underlying web technologies
• Be a thought partner to the team — collaborate closely so product and UX direction is a shared conversation
• Translate enterprise signal into product — partner with GTM and customers to turn the "enterprise-legible" story into experiences buyers immediately understand
• Write maintainable, performant full-stack code
• Develop deep product knowledge of the MCP ecosystem and AI/LLM tooling space
• Participate in on-call / incident response and help maintain production reliability standards

Benefits

• Supportive, high-performance culture
• Remote-first team
• Opportunity to contribute to the evolution of our product, our team, and our community

Company Description

Prefect builds and operates resilient, Pythonic orchestration and MCP platforms -- Prefect OSS, Prefect Cloud, FastMCP OSS, and Horizon -- used for mission-critical workloads.

Our Vision: Prefect will define automation for the context era.

Our Mission: Curate an intelligent context layer that delivers the right information at the right time.

Our company operates both open-source and commercial offerings, partnering with Fortune 500 companies, data innovators, and fast-growing digitally native startups.