PrimeFit
Training Management System
Full-stack SaaS platform for gym management with multi-tenant architecture. Features role-based access control, real-time workout tracking, and optimized state management reducing re-renders by 80-90%. Currently serving active production clients.
Tech Stack
Overview
PrimeFit was born from the need of personal trainers to efficiently manage multiple clients. As a developer and someone involved in fitness, I identified the lack of accessible and comprehensive tools for this market. I developed PrimeFit as a complete solution that not only manages workouts but also improves communication between trainers and clients.
⚡ The Challenge
The main challenge was creating an application that handled multiple gyms (multi-tenant) securely, with specific roles and permissions, while maintaining optimal performance. Additionally, I needed a state system that handled real-time updates without sacrificing user experience with unnecessary re-renders.
✓ The Solution
I implemented a robust multi-tenant architecture using Row Level Security (RLS) in Supabase, complemented with Redux Toolkit for optimized global state management. I used advanced memoization techniques and custom selectors that reduced re-renders by 80-90%. The authentication and authorization system was built with multiple layers of security, from frontend to database.
Impact & Results
Significant performance optimization through intelligent state management
Gyms currently using the platform in production
Optimized full application first load
Key Features
Multi-Tenant Architecture
System that allows multiple gyms to operate independently on the same platform, with complete data isolation and customization per tenant.
Role-Based Access Control (RBAC)
Granular permission system that distinguishes between Administrators, Trainers, and Clients, with specific capabilities for each role.
Real-Time Workout Tracking
Clients can see their updated routines instantly when trainers make changes, using Supabase Realtime subscriptions.
Analytics Dashboard
Visualization of client progress, attendance statistics, and performance metrics for informed decision-making.
Workout Plan Management
Creation, editing, and assignment of personalized routines with exercise library, sets, reps, and technical notes.
Technical Highlights
- ▸ Redux Toolkit implementation with RTK Query for automatic caching and state synchronization
- ▸ Row Level Security (RLS) in PostgreSQL for database-level security
- ▸ Reusable custom hooks for complex business logic
- ▸ Bundle optimization with code splitting and lazy loading
- ▸ Unit and integration testing with Jest and React Testing Library
- ▸ CI/CD pipeline with Vercel for automatic deployments
- ▸ Mobile-first responsive design with Tailwind CSS
Key Learnings
The importance of planning multi-tenant architecture from the start - modifying it later is costly
Redux Toolkit with memoized selectors can dramatically reduce unnecessary re-renders
Row Level Security in the database is crucial for secure multi-tenant applications
Early feedback from real users is invaluable for prioritizing features
Documenting architectural decisions greatly facilitates future maintenance
Next Steps
- → Impelement my own design system focused on UX with Shadcn as base
- → Implement native mobile app with React Native or other technologies
- → Add push notification system for workout reminders
- → Integrate with wearables and popular fitness apps