Building a SaaS MVP doesn't have to cost six figures or take a year to launch.
Recently, I built and launched PeptiSync, a HealthTech SaaS platform, in just six weeks. The project included a web application, Android and iOS apps, authentication, subscription management, payment integration, and a production deployment.
In this article, I'll break down the architecture, technology choices, timeline, estimated budget, and the biggest lessons I learned while taking an idea from concept to launch.
The Project
PeptiSync is a HealthTech SaaS platform that helps users manage peptide therapy by tracking protocols, comparing vendors, managing subscriptions, and monitoring their progress from a single dashboard across web and mobile.
The MVP included:
- Responsive web application
- Android application
- iOS application
- User authentication
- Subscription management
- Stripe integration
- Admin functionality
- SEO optimization
- Production deployment
Week 1–2: Building the Foundation
Estimated Cost: ~$3,500
The first two weeks were dedicated to making the right architectural decisions instead of rushing into features.
The technology stack included:
- Next.js
- TypeScript
- Flutter
- Firebase Authentication
- Firestore
- Stripe
Some of the key technical decisions were:
- Building the web and mobile applications in parallel
- Using shared data models where possible
- Leveraging Firestore for real-time synchronization
- Keeping the project structure clean from the beginning
- Prioritizing scalability without overengineering
Getting these decisions right early made the remaining weeks significantly smoother.
Week 3–4: Building the Core Features
Estimated Cost: ~$6,000
This is when the product started becoming a real application instead of a prototype.
Core features included:
- Google Authentication
- User dashboard
- Vendor management
- Price comparison
- Subscription plans
- Stripe payments
- Responsive layouts
- Mobile applications
One lesson I've learned from building SaaS products is simple:
Build the feature that proves value first.
Everything else can come later.
For PeptiSync, helping users compare vendors and manage their subscriptions was the core value proposition. Everything else supported that goal.
Week 5–6: Polish & Launch
Estimated Cost: ~$4,500
The final stage focused on preparing the application for production.
This included:
- UI refinement
- Performance optimization
- SEO implementation
- Structured data
- XML sitemap
- Testing
- CI/CD pipeline
- Production deployment
These tasks often receive less attention during planning, but they're what transform an MVP into a product that users can actually trust.
Architecture
Web (Next.js)
│
Firebase Authentication
│
Firestore
│
Stripe Payments
│
Android & iOS (Flutter)
The architecture was intentionally kept simple. Every technology was chosen because it reduced development time while still providing a solid foundation for future growth.
Why Firebase?
For an MVP, Firebase provided everything needed to move quickly:
- Authentication
- Firestore database
- Real-time synchronization
- File Storage
- Security Rules
- Analytics
Without maintaining a traditional backend, development could stay focused on solving user problems instead of infrastructure management.
While every project has different scaling requirements, Firebase proved to be an excellent choice for getting the MVP into users' hands quickly.
Estimated Budget Breakdown
| Item | Estimated Cost |
|---|---|
| Development | $11,000 |
| Stripe setup & testing | $500 |
| Firebase | $600 |
| Domain & infrastructure | $200 |
| Developer accounts | $200 |
| Design assets | $500 |
| Legal documents | $1,000 |
| Tools & subscriptions | $1,000 |
| Total | ~$15,000 |
What I'd Do Differently
1. Set Up Stripe Earlier
Integrating payments earlier changes how you prioritize features.
When users can pay earlier, it becomes much easier to identify which features actually support the business.
2. Write More Automated Tests
Writing more tests during the early stages would have reduced debugging time later in the project.
It's much cheaper to prevent bugs than fix them in production.
3. Cut More Features
One mistake many founders make is trying to build Version 3 before Version 1 has launched.
Shipping a focused MVP is almost always better than delaying launch to add "just one more feature."
Biggest Takeaway
Building a successful SaaS MVP isn't about choosing the newest framework or creating the most complicated architecture.
It's about making smart technical decisions, controlling scope, solving a real problem, and shipping.
PeptiSync reinforced that lesson for me.
Every feature, every technology choice, and every week of development should move the product closer to delivering value—not just adding complexity.
Thanks for reading!
If you're building a SaaS product and want to discuss architecture, MVP planning, or technical strategy, feel free to connect.
🌐 Portfolio: https://www.rahulsinghnegi.com
💻 GitHub: https://github.com/rahulsinghnegiii
I'm always happy to chat with founders who are building their next product.
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