Senior Frontend Engineer — Workflow Builder

About Plexis

Plexis lets healthcare teams visually build and deploy governed workflows across EHR, ERP, scheduling, lab, messaging, and internal systems.

We are building a serious enterprise platform, not a simple dashboard or CRUD SaaS app. The workflow builder is the product surface.

Role

We are looking for a Senior Frontend Engineer to own the frontend product experience for Plexis.

You will build the visual workflow builder and operational console that users rely on to create workflows, configure nodes, test flows, publish versions, monitor executions, review audit trails, approve actions, and resolve failed or uncertain workflow runs.

This is a complex product engineering role. You should be comfortable building graph-based interfaces, heavy stateful UI, schema-driven forms, admin consoles, execution timelines, and enterprise-grade workflows.

This is not a marketing site role. This is not a basic React dashboard role.

Core Responsibilities

You will own frontend development for:

• Visual workflow builder using a node-based canvas

• Node palette, drag/drop interaction, edge connections, zoom/pan, selection states

• Node configuration side panels

• Dynamic forms for node configuration

• Workflow draft, validation, test run, and publish flows

• Workflow templates that users can customize

• Connector setup and connector health screens

• Run history and execution timeline

• Audit trail visualization

• Approval queue and operator task views

• Reconciliation queue for workflows requiring human review

• Admin settings, tenant configuration, and user/role management

• Frontend/backend contract design with the backend platform engineer

• A polished product experience that feels safe, serious, and enterprise-ready

Required Experience

• 6–10+ years of frontend or product engineering experience

• Strong React

• Strong TypeScript

• Experience building complex B2B SaaS products

• Strong frontend architecture judgment

• Strong state management experience

• Experience with API-heavy applications

• Experience building data-heavy admin consoles, workflow tools, dashboards, or internal platforms

• Ability to translate complex backend states into clear user-facing interfaces

• Strong product sense and UX judgment

• Comfortable working closely with backend engineers on API contracts and data models

• Ability to move fast without creating messy, unmaintainable frontend architecture

Strongly Preferred Experience

• React Flow or similar graph/canvas editor experience

• Workflow builder, automation builder, low-code/no-code, BPM, integration-platform, or internal-tool-builder experience

• Drag/drop UI and node-based editor experience

• Complex form builders or schema-driven forms

• Zustand, TanStack Query / React Query, Redux, Jotai, or similar tools

• Tailwind, shadcn/ui, Radix UI, or similar component systems

• Timeline, audit log, event-history, or activity-feed UI experience

• Enterprise SaaS, fintech, healthcare, compliance, or regulated-product experience

• Experience building polished UX for complex operational products