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Case study · 2023

Fintech Mobile Suite

A regional bank needed to modernize their mobile banking experience. Their existing native apps were outdated, slow, and expensive to maintain with separate iOS and Android codebases. They wanted a single codebase that could deliver native performance while supporting new features like biometric authentication and real-time notifications.

Client
Regional Commercial Bank
Practice
Mobile & Next-Gen
Industry
Financial Services
Lifecycle
10 months
Outcome highlights

Business impact at a glance.

Measured Impact
0.1%

App crashes reduced from weekly to less than 0.1% of sessions.

Measured Impact
12

Transaction processing time decreased from 12 seconds to 2 seconds.

Measured Impact
180%

User adoption increased by 180% in first 6 months.

Measured Impact
2

App store ratings improved from 2.8 to 4.6 stars.

Measured Impact
40%

Development costs reduced by 40% with single codebase.

01

Business Challenge

  • Separate iOS and Android apps meant double development and maintenance costs.
  • App crashes occurred 2-3 times per week, frustrating users.
  • Transaction processing took 8-12 seconds, causing user abandonment.
  • No biometric authentication, requiring users to enter passwords repeatedly.
  • Push notifications were unreliable, missing critical alerts.
02

Our Approach

We chose Flutter for cross-platform development, allowing us to maintain a single codebase while delivering native performance. We built the app with a focus on security, implementing biometric authentication, encryption, and secure API communication. We optimized the transaction flow to minimize latency and built a robust notification system.

Phase 01

Discovery & alignment

Workshops, process and systems review, success metrics.

Phase 02

Design & planning

Architecture, experience and workflow design, delivery plan.

Phase 03

Build & validation

Implementation, integration, testing, demos, refinements.

Phase 04

Go-live & enablement

Controlled rollout, training, handover, post-launch tuning.

03

What We Delivered

  • Built Flutter app with single codebase for iOS and Android.
  • Implemented Face ID, Touch ID, and fingerprint authentication.
  • Optimized API calls reducing transaction time from 12s to 2s.
  • Built real-time notification system using Firebase Cloud Messaging.
  • Created offline mode for viewing balances and transaction history.
  • Integrated fraud detection system with real-time alerts.
  • Added multi-currency support for international transactions.

Technology Stack

Flutter Dart Firebase REST APIs Biometric Authentication SQLite Push Notifications
The new app has transformed our mobile banking. Our customers love the speed and security, and we've seen massive adoption.

David Kim

Chief Digital Officer

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