Overview
SozoFitness is a full-stack SaaS web application for booking and managing paid fitness sessions. Built with Next.js App Router and deployed to AWS, it handles authentication, payment processing, video meeting generation, and automated notifications through a separate worker service.
The Problem
Fitness professionals need a reliable platform to manage client bookings, process payments, generate meeting links, and send automated reminders—all while maintaining production-grade reliability and security.
The Solution
Developed a production-ready SaaS platform with Next.js + TypeScript, PostgreSQL (RDS), and Prisma for data management. Implemented Stripe webhook handling with idempotent event processing, Zoom API integration for meeting links, and a separate worker service for email/SMS reminders. Deployed to AWS using Copilot (ECS/Fargate) with custom HTTPS domain, secure secrets management, and environment-based configuration.
Key Features
Technical Highlights
- →Production AWS deployment: ECS/Fargate with Copilot, RDS Postgres, ALB, Route 53/ACM for HTTPS
- →Stripe webhooks: signature verification, idempotency keys, event deduplication, failure handling
- →Data layer: Prisma schema, migrations, production migrate workflow
- →Worker service: polling/cron-like reminders with retry strategy and notification safety
- →Security: secrets in SSM/Copilot, least-privilege IAM, HTTPS, environment separation
- →Operational tooling: health endpoints, structured logs, safe background processing with retries
Tech Stack
Lessons Learned
- •Webhook reliability: signature verification, idempotency patterns to prevent double-charging and double-provisioning
- •AWS production architecture: ECS/Fargate orchestration, RDS connectivity, ALB routing, custom domain with ACM
- •Data migrations in production: safe Prisma migration workflow, seeding strategies, rollback planning
- •Async job processing: worker service design, polling strategies, retry logic, failure handling
- •Production operations: health checks, structured logging, secrets rotation, environment management, deployment strategies
Interested in learning more?
Let's discuss this project and how my experience can benefit your team.