S30 Studios Platform
Multi-tenant fitness franchise platform processing $5M+ annually across 19+ studios in Australia, New Zealand, and Singapore. Stripe Connect payment infrastructure, React Native mobile app, Next.js admin dashboard, and automated billing pipelines.
Role: Technical Lead & Full-Stack Architect
The Challenge
S30 Studios is a boutique fitness franchise operating 30-minute high-intensity workout sessions across Australia, New Zealand, and Singapore. They needed a complete digital platform to replace fragmented manual processes — member management, class booking, recurring billing, franchise reporting, and mobile member experience.
The complexity: each studio operates as an independent business entity with its own Stripe account, pricing, and local regulations, but members expect a unified experience. The platform needed multi-tenant isolation while presenting a seamless single-brand interface.
Critical requirement: payment reliability. The existing system had 30% of members consistently overdue, causing significant cash flow problems across the franchise network.
System Architecture
Four interconnected systems serving members, staff, and franchise operators
MEMBER APP
React Native 0.76 + Expo 52
61,000+ lines TypeScript
182 reusable components
AES-256 encrypted storage
Real-time class booking
iOS + Android
ADMIN DASHBOARD
Next.js 14 App Router
React 18 Server Components
150+ components
Role-based access control
Real-time analytics
Franchise management
PAYMENTS SERVER
Bun runtime + Hono
11 Cloud Functions
Stripe Connect integration
Multi-currency (AUD/NZD/SGD)
Automated billing
AWS ECS Fargate
DATA LAYER
Supabase PostgreSQL
45+ normalized tables
4,200+ lines of types
Row-Level Security
Real-time subscriptions
Studio-level isolation
Payment Infrastructure
Stripe Connect multi-tenant architecture with isolated accounts per studio
Multi-Tenant Stripe Connect
Each of the 19+ studios has its own Stripe Connected Account. Payments are processed directly to the studio's account with platform fees automatically deducted. This provides complete financial isolation while maintaining a unified member experience.
Multi-Currency Processing
Native support for AUD (Australia), NZD (New Zealand), and SGD (Singapore) with country-specific Stripe transaction fee calculations (1.7%-3.9% + flat fees). Supports both credit card and AU BECS Direct Debit payment methods.
Automated Recurring Billing
Daily batch job processes 1,000+ member billing records. 3-tier retry logic with exponential backoff for failed payments. Automated dunning email campaigns via SendGrid. $10 AUD dishonor fee assessment for repeated failures.
Payment State Machine
Comprehensive state tracking for payment intents, retry attempts, failure reasons, and recovery status. Critical errors trigger Slack webhooks for immediate ops team notification. Full audit trail for financial reconciliation.
Overdue Rate: 30% → 2.45%
Achieved within 6 months through automated retry logic and dunning campaigns
Membership Lifecycle Engine
State machine managing the complete member journey across 19+ locations
Suspension & Termination
Configurable fee assessment, grace period management, automated state transitions, and email notification sequences. 20+ custom SendGrid templates for member communications.
Cross-Studio Transfers
Members can transfer between studios with automated billing updates, Stripe account reassignment, and multi-party notifications (email + push) to all stakeholders.
Churn Prevention
"Members at risk" predictive detection with automated CRM triggers to GoHighLevel, enabling proactive retention campaigns before members cancel.
Milestone Tracking
Automated marketing campaigns triggered at key lifecycle events — signup anniversaries, attendance thresholds, membership renewals — via CRM integration.
Automation & DevOps
14+ scheduled jobs orchestrating daily operations across the platform
Daily Payment Processing
Midnight UTC
Membership Expirations
Daily
Studio Metrics Aggregation
6 PM daily
Kisi Access Control Sync
Hourly
Payout Report Generation
Weekly
CI/CD Pipeline
GitHub Actions → Docker build → AWS ECR push → ECS Fargate deployment with stability verification. Fly.io continuous delivery on main branch.
Monitoring & Alerting
Sentry error tracking (100% transaction sampling), AWS CloudWatch logs, Slack webhooks for critical events, and structured logging throughout.
Third-Party Integrations
10+ external services orchestrated into a unified platform
Stripe
Payments
ClassPass
Scheduling
GoHighLevel
CRM
SendGrid
Expo
Push
Kisi
Access
Leads
Clerk
Auth
Sentry
Errors
Supabase
Database
Mobile Application
61,000+ lines of production TypeScript serving 7,000+ active members
Real-Time Booking
Class capacity tracking, waitlist management, automatic promotion when spots open, conflict prevention across concurrent bookings.
Attendance & Gamification
Leaderboards, attendance streaks, achievement medals. QR check-in with automated ranking updates and milestone notifications.
Community Features
Social posts, threaded comments, polls with voting, media attachments. Deep-linking from push notifications to specific content.
Secure Storage Solution
Custom AES-256-CTR encryption for auth tokens exceeding iOS/Android 2KB secure storage limits. Keys in secure enclave, ciphertext in AsyncStorage.
Payment Management
Stripe React Native SDK integration. Setup Intents for card storage, payment method CRUD, subscription status tracking with real-time sync.
Multi-Location Support
Haversine distance calculation for nearby studio discovery. Studio transfers with automated Stripe account reassignment.
Technology Stack
| MOBILE | React Native 0.76, Expo 52, TypeScript 5.3, Jotai, React Navigation 6.x, Clerk |
| DASHBOARD | Next.js 14 App Router, React 18, TypeScript 5.7, Tailwind 3.4, React Query, Recharts |
| BACKEND | Bun v1, Hono 4.6, TypeScript, Zod validation, jsPDF reporting |
| DATABASE | Supabase PostgreSQL, 45+ tables, Row-Level Security, real-time webhooks |
| PAYMENTS | Stripe Connect, multi-currency (AUD/NZD/SGD), BECS Direct Debit, recurring billing |
| DEVOPS | GitHub Actions, Docker, AWS ECR/ECS Fargate, Fly.io, Sentry, CloudWatch |
Results
Business Impact
- ✓$5M+ annual transactions processed reliably
- ✓Overdue rates reduced from 30% to 2.45%
- ✓100K+ bookings managed annually
- ✓Scaled to 19+ locations across 3 countries
Technical Delivery
- ✓iOS + Android apps live on stores
- ✓Admin dashboard serving franchise operators
- ✓14+ automated jobs running daily
- ✓10+ third-party integrations orchestrated
Note: S30 Studios entered administration in late 2024. The platform operated successfully throughout its deployment, processing millions in transactions and serving thousands of members across the franchise network.
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