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Engineer — Product & User Interface Systems

Guild

📍San Francisco, California, US

onsiteEngineering

Posted 2mo ago · via ashby

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Job Description

We're building the control plane for AI agents in teams and companies.

As a Founding Engineer focused on Product & User Interface Systems, you will design and build the user-facing layer of that control plane — the web applications, workflows, and interfaces that make powerful agent infrastructure usable by real teams.

This is not a “frontend-only” role. You will work across the stack: distributed cloud-based systems, Kubernetes-based services, and modern web applications. You’ll collaborate deeply with product and design to turn complex infrastructure into intuitive, high-leverage user experiences.

You’ll also help define a new interface paradigm: agents as an interactive modality — not just chat, but structured, controllable, and production-grade workflows.

If you care about product quality, system coherence, and shaping how humans interact with autonomous systems — we want to talk.

What You’ll Own

You will build and evolve the user-facing layer of our platform:

Web Application & Product Experience

  • Design and implement React + TypeScript web applications

  • Build high-performance, stateful interfaces for managing agents

  • Develop dashboards, policy configuration UIs, audit views, and workflow builders

  • Create systems that make complex agent behavior understandable and controllable

Full-Stack Engineering

  • Build backend services supporting the UI

  • Design APIs for agent control, policy configuration, and observability

  • Work within a Kubernetes-native, cloud-based distributed system

  • Collaborate on schema design, data modeling, and service boundaries

Agent-Native Interfaces

  • Explore agents as a new user interface modality

  • Design structured, interactive agent workflows beyond simple chat

  • Combine UI controls with agent reasoning

  • Experiment with hybrid patterns: visual + conversational + automated systems

CLI & Future Interfaces

  • Contribute to a TypeScript- or Python-based CLI

  • Design consistent interaction patterns across web and CLI

  • Lay groundwork for potential future mobile interfaces

Product & Design Collaboration

  • Work closely with product and design to translate concepts into shipped software

  • Participate in usability thinking and iterative refinement

  • Ship quickly, iterate based on feedback, and improve continuously

What We’re Looking For

  • Experience building production-grade web applications in React + TypeScript

  • Comfort working across the full-stack of distributed systems

  • Strong API design instincts

  • Experience shipping SaaS products used by technical teams

  • Ability to translate complex backend systems into usable interfaces

  • Strong product intuition and UX sensibility

Bonus

  • Experience building developer tools or control-plane software

  • Experience designing workflow builders or configuration-heavy interfaces

  • Experience with real-time systems or streaming UIs

  • Experience building CLIs

  • Familiarity with LLM-powered products or agent systems

What Makes This Role Unique

  • You’ll help define how teams interact with autonomous agents.

  • You’ll build interfaces for infrastructure-level systems.

  • You’ll operate at the intersection of product design, distributed systems, and AI.

  • You’ll have ownership from concept to production.

This is a high-impact, high-autonomy role. You’ll influence product direction and user experience at the foundational stage of the company.

Who Thrives Here

  • Engineers who care about product polish and system clarity.

  • Builders who like working across frontend and backend.

  • People comfortable turning complexity into usable abstractions.

  • Those excited about inventing new human–AI interaction models.

Details

Department
Engineering
Work Type
onsite
Locations
San Francisco, California, US
Posted
February 13, 2026
Source
ashby