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Product Engineer (UI-Focused) — Horizon

Prefect

Remote · US$172k – $242k

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About this role

PREFECT https://www.prefect.io/ BUILDS AND OPERATES RESILIENT, PYTHONIC ORCHESTRATION AND MCP PLATFORMS -- PREFECT OSS https://github.com/PrefectHQ/prefect, PREFECT CLOUD https://www.prefect.io/prefect/cloud, FASTMCP OSS, https://gofastmcp.com/getting-started/welcome AND HORIZON https://www.prefect.io/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 remote first company is singularly focused on this vision and mission, and every team member directly contributes to their advancement.

We've carefully created a supportive, high-performance culture - the operating system of our company - that empowers our team to do the best work of their careers and achieve their personal and professional aspirations.

Our company operates both open-source and commercial offerings, partnering with Fortune 500 companies, data innovators, and fast-growing digitally native startups. We are looking for folks who want to join a remote-first team #LI-Remote to continue building an equally amazing company, product, and developer community.

ROLE SUMMARY:

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: the user flows and information architecture, the 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. And you'll be a thought partner to the rest of the Horizon team: we're deliberately hiring two engineers into this profile so the product surface is never owned by someone working alone — you'll 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.

WHAT YOU'LL DO:

- Own end-to-end UI and product features in Horizon — from user problem to information architecture to shipped, polished experience. You define what "done" looks like.

- 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 — and the judgment to direct AI development tools rather than depend on them.

- Be a thought partner to the team — collaborate closely so product and UX direction is a shared conversation, not a solo burden.

- Translate enterprise signal into product — partner with GTM and customers to turn the "enterprise-legible" story (gateway plugins, PII filtering, audit logs, SCIM) into experiences buyers immediately understand.

- Write maintainable, performant full-stack code — your center of gravity is the product surface, and you're capable across the stack when the feature demands it.

- 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.

YOUR 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. Senior enough to pull context from across the org and push back on the team — including on UX.

- Deep front-end craft: strong proficiency in TypeScript, React, and modern UI libraries (e.g. TanStack), plus real understanding of the underlying web technologies — enough to guide AI tools, not lean on them for technical direction.

- Strong product and UX judgment. You think in user flows, information architecture, and how a product is actually used, and you have opinions and the craft to back them up. (This is UI in the broad sense — UX thinking plus front-end engineering — not styling/CSS specialism or pure user research.)

- 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. You follow the landscape closely.

- Self-directed with strong judgment and clear communication.

- Real fluency with AI development tools. You've shipped meaningful work with Claude Code, Codex, or their equivalents. You stay accountable for what they produce: you direct them with specs legible to humans and machines; and use them to create a high trust production environment for users. You can make them force multipliers and clearly say when they get in the way.

- A formal design background is not required.

BELONGINGNESS AT PREFECT:

Belongingness at Prefect is our commitment to ensuring mutual power, access, and opportunity among all groups and individuals who make up our community. We operationalize belongingness through actions large and small on a daily basis, but always with the goal that all groups and individuals can contribute as their most authentic self to

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