DualityVPN
Full-cycle development of a lightweight VPN app that runs across all major platforms — iOS, Android, Web, and Windows — featuring custom paywalls, traffic management, and a unified backend. Built lean: 3 people, 3 months, $15K total.
Project amount
~$15,000
Timeline
3 months
Team
3 people
Stack
Flutter, Node.js, Go, PostgreSQL, WireGuard, Firebase, AWS
About the Client
DualityVPN set out to create a simple yet powerful VPN product accessible from any device, with a fast connection experience and flexible subscription model.
Main request
The goal was to launch a fully functional MVP supporting all major platforms from a single codebase. The challenge — build a performant VPN infrastructure, custom paywall system, and reliable backend in just three months with a minimal team and budget.
What we did
Mapped out a single backend capable of handling all platforms with minimal overhead using modular services for authentication, payments, and traffic control
Created a unified Flutter codebase for iOS, Android, Web, and Windows with optimized layouts and state management for fast UI rendering
Built a simple yet effective routing system for managing server lists and active sessions with live connection status and latency monitoring
Integrated Stripe, Apple, and Google payments into a unified subscription engine with flexible paywalls for different user tiers
Automated smoke tests for connection stability on all platforms and set up CI/CD deployment pipelines with automated versioning
Problem solving
The key challenge was to build a fully functional cross-platform VPN with minimal resources. We achieved this by cutting all non-essential features, reusing internal modules, and relying on Flutter's ecosystem for rapid iteration.
Before
After
Result
The team delivered a production-ready VPN app that launched on all major platforms within 90 days. The architecture supports real-time server switching, in-app subscriptions, and analytics — all running on a lightweight infrastructure optimized for scale. This lean build proved that full cross-platform VPN products can be shipped fast, stable, and cost-effective.
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