— Case Study Detail
Appointment Booking & Rewards SaaS for the Aesthetic Industry
PRODUCT
KiSS Loyalty Club
INDUSTRY
Aesthetic & Wellness (US Market)
PRODUCT TYPE
Multi-tenant SaaS (Appointment Booking + Loyalty + Email Marketing)
PLATFORM
Web App
— OVERVIEW
PROJECT
summary
KiSS Loyalty is a digital rewards and engagement platform designed for aesthetic and wellness businesses. It enables non-technical business owners to create, manage, and scale loyalty programs, appointment workflows, and email marketing campaigns from a single SaaS platform.
— PROBLEMS
CLIENT
PAIN POINTS
The client was previously dependent on a third-party platform that limited scalability, customization, and control over their SaaS operations.
01
Limited Customization
- No control over workflows or UI/UX branding
- Unable to extend platform features
- Poor alignment with aesthetic industry needs
02
Weak Email Marketing System
- No multi-campaign support per tenant
- No template customization
- No visibility into engagement metrics
03
No SaaS Ownership
- No custom domains for tenants
- No centralized admin control
- No platform-level analytics or monitoring
— THE HURDLES
CORE CHALLENGES & my approach
Challenges
Building a scalable multi-tenant SaaS supporting appointment booking, loyalty, and email marketing.
Handling high-volume email campaigns (100K+ emails per campaign) reliably.
Ensuring tenant isolation, branding flexibility, and custom domain support.
Delivering a production-ready SaaS within a strict 16-week timeline.
My Approach
Designed a modular multi-tenant architecture with strict data isolation per tenant.
Implemented scalable email infrastructure using AWS SES, SNS, and ECS.
Built flexible UI/UX system allowing full tenant-level branding control.
Prioritized cloud-native architecture for scalability and cost efficiency.
— Features
SOLUTION I provided
Built a full end-to-end SaaS platform covering booking, loyalty, email marketing, and admin control systems.
1. Appointment Booking System
Flexible booking system tailored for aesthetic clinics with tenant-specific workflows.
- Custom scheduling flows per tenant
- Dynamic availability management
- Seamless appointment lifecycle handling
2. Rewards & Loyalty Engine
A fully configurable loyalty system enabling businesses to define their own reward rules.
- Custom points and reward logic per tenant
- Scalable redemption tracking
- Automated reward calculations
3. Email Campaign System
Advanced email marketing system with analytics and campaign automation.
- Multi-campaign support per tenant
- Custom email templates
- Open, bounce, and delivery tracking
4. Custom Domain Support
Enabled full white-label SaaS experience with tenant-level domains.
- DNS-based routing system
- Tenant-level branding isolation
- Secure domain mapping
5. Super Admin Dashboard
Centralized control panel for managing all tenants and platform metrics.
- Platform-wide analytics
- Tenant lifecycle management
- Usage and engagement monitoring
— Features
SYSTEM ARCHITECTURE &
scalability
FRONTEND
Next.js
Performance, SEO, and scalability
BACKEND
NestJS
Modular and scalable architecture
DATABASE
PostgreSQL
Reliable relational data storage
EMAIL STACK
AWS SES / SNS / ECS
High-volume email processing system
ARCHITECTURE
Multi-Tenant SaaS
Isolated, scalable tenant system
High-Volume Email Handling
Email Delivery Stack
- AWS SES for high deliverability
- AWS SNS for event-driven email orchestration
- AWS ECS for scalable background processing
Key Features
- Designed to send 100,000+ emails per campaign
- Automatic retry mechanisms for failures
- Graceful handling of bounces and delivery
- Event-based processing to avoid bottlenecks
This ensured reliability, fault tolerance, and performance under peak loads.
— DIAGRAM
ARCHITECTURE diagram
High-level system design showing multi-tenant architecture, email pipeline, and core SaaS services.
— OUTCOMES
RESULTS & impact
Full SaaS Ownership
Replaced third-party system with a fully custom platform
High-Volume Email System
Enabled 100K+ emails per campaign with reliability
Scalable Architecture
Built for long-term SaaS growth and expansion
Faster Time to Market
Production-ready SaaS delivered in 16 weeks
— FEEDBACK
CLIENT testimonial
Habib and his team exceeded my expectations in every way. We partnered with them to build a full SaaS platform for our KiSS Club rewards system, and the experience was exceptional from beginning to end. Their problem-solving approach, communication, and execution quality were outstanding.
KiSS Loyalty Client
— Aesthetic & Wellness Industry
