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Shift Scheduler replaces manual spreadsheets with a purpose-built admin dashboard and tablet-friendly kiosk for event staffing operations. You define the event structure — groups, shifts, requirements — and the system handles assignment logic, conflict detection, asset tracking, and attendance reporting. It is built for single-day and multi-shift events where volunteers need to be organized into roles (e.g., Medical, Security, General), assigned to time slots, and checked in on-site with equipment.
Shift Scheduler is deployed on Render’s free plan. The service may spin down after inactivity, causing a brief cold-start delay on first load.

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Key capabilities

Events

Create and manage events with a real-time dashboard showing fill rates, attendance counts, and volunteer distribution.

Volunteers

Build a volunteer database with group affiliations, max-hours limits, contact info, and bulk CSV import.

Assignments

Manually assign volunteers to shifts or use Auto-Assign to fill open slots automatically, with conflict detection to prevent double-booking.

Kiosk

A tablet-friendly self-service check-in interface for on-site use. Volunteers search by name to check in and out.

Assets

Manage a pool of equipment (radios, vests, keys) and track which volunteer has each item during a shift.

Reports

Export volunteer schedules, sign-in sheets, and attendance data as CSV or PDF.

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Architecture

Shift Scheduler uses three main layers:
LayerTechnologyPurpose
FrontendNext.js 16 (App Router)Admin dashboard, kiosk UI, and all user-facing pages
Database & AuthSupabase (PostgreSQL)Data persistence, Row Level Security, and user authentication
Scheduling EngineGo Scheduler API v2.1Stateless HMAC-authenticated service that computes optimal volunteer-to-shift assignments
The Next.js app communicates with Supabase directly from the browser using the Supabase JS client. The Go scheduler API is an external service called from the server side when Auto-Assign is triggered — no additional infrastructure is required on your end. The app is installable as a Progressive Web App (PWA) via @ducanh2912/next-pwa, which generates a manifest.json and service worker for add-to-home-screen support on mobile and tablet devices.

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Free plan note

The hosted version runs on Render’s free service tier. This means:
  • The web service sleeps after 15 minutes of inactivity.
  • The first request after inactivity may take 30–60 seconds to respond while the container wakes up.
  • There are no uptime guarantees on the free tier.
For production use with high availability requirements, deploy to a paid Render plan or another Node.js host. See Installation for self-hosting instructions.

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