The Challenge
NeoBank Corp was entering a crowded market dominated by established giants and agile startups. Their initial MVP was functional but clunky, built on legacy banking APIs that resulted in slow load times and a disjointed user experience. They were failing to capture their target demographic: Gen Z users who expect instant, seamless, and social digital experiences.
They needed a complete overhaul of their mobile architecture to support rapid scaling and feature agility.
The Solution
Sparkable acted as the fractional CTO team, architecting a modern, cloud-native banking platform from the ground up.
Mobile-First React Native App
We rebuilt the mobile application using React Native, ensuring a silky-smooth 60fps experience on both iOS and Android. We focused heavily on micro-interactions—haptic feedback, smooth transitions, and instant state updates—to make the app “feel” premium.
Microservices Architecture
We decoupled the monolithic backend into scalable microservices using Go and Docker. This allowed us to deploy updates to the “Payments” service without risking downtime for the “Auth” or “Notifications” services.
AI-Powered Financial Assistant
We integrated a custom LLM-based chatbot that helps users understand their spending habits in plain English, moving beyond simple charts to actionable financial advice.
Key Technologies
- React Native: For a high-performance cross-platform mobile experience.
- Go (Golang): For high-concurrency backend services.
- Kubernetes: For orchestrating our containerized infrastructure.
- Kafka: For event-driven architecture and real-time transaction processing.
The Results
The relaunch positioned NeoBank as a serious contender in the market.
- 100,000+ Active Users: Within 3 months of the relaunch.
- 4.8/5 App Store Rating: Up from a 3.2 star rating on the legacy app.
- 99.99% Uptime: Even during viral marketing campaigns that caused traffic spikes.
“The Sparkable team brought the engineering discipline of a big bank with the speed of a startup. They are the reason we scaled.” — Jessica Wu, CEO of NeoBank Corp