React 18 Vite Node.js SaaS ERP Vehicle Washing

Building a Smart Vehicle Washing Center ERP SaaS Platform

React + Vite | Node.js | Slot Booking | Rewards | Multi-tenant SaaS

packages/frontend packages/backend packages/shared

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Frontend React 18 + Vite

Backend Node.js + Express

Architecture Multi-tenant SaaS Monorepo

Duration Ongoing

Region Global

About the Project

Project Overview

Washing ERP is a multi-tenant SaaS platform built with React 18 + Vite frontend and Node.js + Express backend. Any vehicle washing center owner can purchase a subscription, set up their service center, configure working hours, divide their day into booking slots, and start accepting customer bookings — all within minutes.

Customers earn reward points on every wash, admins manage schedules, invoices, and plans, while the platform handles multi-tenant isolation, subscription billing, and notifications automatically.

Multi

Tenant SaaS

User Roles

Subscription Plans

Super Admin

Manages all tenants, plans & platform billing

Center Owner

Sets up center, slots, holidays & rewards

Wash Staff

View schedule, mark wash done & issue invoice

Customer

Book slots, earn reward points & view history

MONOREPO STRUCTURE

                        
                        packages/frontend
                        React 18 + Vite SPA

                        
                        packages/backend
                        Node.js + Express API

                        
                        packages/shared
                        TypeScript types & validators

npm workspaces • multi-tenant schema per subscription

SaaS Onboarding

Purchase, Setup & Go Live

Any washing center owner can sign up, choose a plan, fill their center details, and be live in minutes — no code needed.

Center owner signs up on the platform with basic details.

Fill Center Details

Add center name, address, services, vehicle types & pricing.

Choose a Plan

Select Starter, Pro, or Enterprise and pay via Stripe/Razorpay.

Configure Schedule

Set working days, holidays, opening hours & slot duration.

Go Live

Share booking link — customers can now see slots and book.

Starter

₹999/mo

For small single-bay washing centers

Up to 20 slots/day
Basic booking management
Invoice generation
Customer reward points
Email notifications

Get Started

Business Challenges

Vehicle washing centers had no digital system to manage bookings, schedules, or customer loyalty:

Walk-ins Only, No System

Long queues, no-shows, missed revenue, and zero customer retention

01 No slot booking — customers just showed up causing long queues

02 No way to define working days, holidays, or shift hours digitally

03 No customer loyalty program to incentivize repeat visits

04 Invoices were handwritten or not issued at all

05 Owners had no dashboard to see daily bookings or revenue

06 No multi-tenant SaaS option — every center needed a custom build

07 No automated reminders to reduce no-shows and last-minute cancellations

What We Built

Our Role & Responsibilities

We designed and developed the full SaaS ERP end-to-end — multi-tenant architecture, React SPA, Node.js API, slot engine, reward system, invoicing, and notification pipeline.

React 18 + Vite SPA — booking UI, admin panel & customer portal

Node.js + Express REST API with JWT multi-tenant auth

Working day & holiday schedule manager per center

Dynamic slot engine — divides working hours into bookable slots

Customer reward points engine with admin-configurable rules

Automated invoice generation per wash booking

Email/SMS booking confirmations, reminders & receipts

Stripe/Razorpay subscription billing for SaaS plans

Development Timeline

Phase 1: Requirement Analysis

Mapped center workflows, slot logic, reward rules & SaaS billing needs

Phase 2: Monorepo + Multi-tenant Setup

npm workspaces, per-tenant DB schema isolation with Prisma

Phase 3: React Frontend

Booking UI, admin schedule config, reward dashboard — Vite + React Query

Phase 4: Node.js API + Slot Engine

REST API, dynamic slot generator, reward engine & invoice service

Phase 5: Deployment & Live

Docker, CI/CD pipeline, Stripe webhooks, SSL — production ready

Slot Booking Engine

Schedule, Slots & Bookings

The admin sets the center's working hours and slot duration (e.g. 30 mins). The Node.js slot engine automatically divides the day into equal time slots. The React frontend shows customers a live color-coded slot board — green for available, red for booked.

Admin marks specific dates as working days or holidays

Sets opening & closing time + slot duration (15/30/60 min)

Node.js auto-generates all slots for the day on the fly

Customer sees real-time slot availability in the React SPA

Customer selects slot, enters vehicle info & confirms booking

Email + SMS confirmation sent instantly via Node.js events

Weekly Schedule Config

Monday 9:00 AM – 6:00 PM 18 slots

Tuesday 9:00 AM – 6:00 PM 18 slots

Wednesday 10:00 AM – 4:00 PM 12 slots

Thursday 9:00 AM – 6:00 PM 18 slots

Friday 9:00 AM – 6:00 PM 18 slots

Saturday 10:00 AM – 2:00 PM 8 slots

Sunday Holiday

Customer Loyalty

Reward Points Engine

After every completed vehicle wash, the system automatically credits reward points to the customer's wallet. The admin configures how many points are earned per wash type and what rewards are redeemable.

Admin sets points per wash type (e.g. 10 pts for basic, 25 for premium)

Points credited to customer wallet automatically after wash is marked done

Customers redeem points for free washes or discounts at checkout

Admin dashboard shows top reward earners & redemption history

Customer Reward Wallet

Rahul Sharma 1,240 pts

Gold Member

Anjali Patel 780 pts

Silver Member

Mohammed Khan 1,095 pts

Gold Member

Priya Singh 320 pts

Bronze Member

Admin Reward Config

Basic Wash = 10 pts Premium = 25 pts Full Detail = 50 pts 100 pts = ₹50 discount

Platform Modules

Washing ERP in Action

Every module built around the washing center workflow — from booking to payment to loyalty rewards.

Schedule Manager

Admin defines working days, holidays, opening hours & slot duration per center.

Slot Booking Engine

Node.js auto-generates time slots; customers see real-time availability & book online.

Booking Management

View, confirm, reschedule, or cancel bookings with full vehicle and customer info.

Reward Points System

Auto-credit points per wash; admin configures earn rates and redemption rules.

Invoice Generator

Auto-generate branded PDF invoices per booking with itemised wash services.

Subscription Billing

SaaS plan management — center owners pay monthly/yearly via Stripe/Razorpay.

Notifications

Email + SMS confirmations, reminders, and receipts triggered by Node.js events.

Analytics Dashboard

Daily revenue, slot utilisation, top customers, and reward redemption reports.

Multi-tenant Management

Super admin oversees all registered centers, plans, and platform-level settings.

Washing ERP Tech Stack

Frontend: React 18 + Vite
Backend: Node.js + Express
Database: MySQL via Prisma ORM
Auth: JWT + Multi-tenant Middleware
Styling: Tailwind CSS + shadcn/ui
State: React Query + Zustand
Email: Nodemailer + SMTP
SMS: Twilio
Payments: Stripe (SaaS) + Razorpay (booking)
PDF: Node.js Puppeteer (invoices)
Repo: Monorepo (npm workspaces)
Deploy: Docker + CI/CD Pipeline

Solution Delivered

What We Built

A production-ready multi-tenant SaaS ERP that any washing center can subscribe to, configure, and use immediately — with zero technical knowledge required.

React SPA

Dynamic booking UI, admin panel, and customer reward wallet.

Node.js API

Multi-tenant REST API with slot engine, reward engine & invoice service.

Slot Engine

Auto-divides working hours into bookable slots based on admin config.

Reward Engine

Points credited per wash, redeemable at checkout with admin control.

Invoice Service

Puppeteer PDF invoices auto-generated and emailed per booking.

SaaS Billing

Stripe subscription management for Starter / Pro / Enterprise plans.

Outcomes

Results & Impact

Measurable improvements for washing centers after switching to the Washing ERP SaaS platform.

70%

Reduction in walk-in queue wait time

No-shows with automated booking reminders

100%

Invoices auto-generated per booking

Higher repeat customer rate with reward points

The Takeaway

Why This Case Study Matters

Proves multi-tenant SaaS architecture at scale with React + Node.js

Demonstrates expertise in dynamic slot generation & scheduling engines

Shows end-to-end loyalty & reward system design inside a SaaS product

Builds trust for service-based businesses needing a custom SaaS ERP

Platform Highlights

Queue Wait Time Reduced 70%

Booking Automation 100%

Invoice Coverage 100%

Repeat Customer Rate 3x↑

Request a Demo

Multi-tenant SaaS — Go Live in Minutes

Ready to Launch Your Washing Center ERP?

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Talk to Expert

React 18 + Vite Multi-tenant SaaS Slot Booking Engine Reward Points Invoice PDF Stripe Billing Twilio SMS Node.js + Express Prisma ORM Docker CI/CD