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.
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.
- 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.
- Real fluency with AI development tools. You've shipped meaningful work with Claude Code, Codex, or their equivalents.