Case Study · Banking & Fintech

Retail Mobile Banking Super-App

A full retail banking app — accounts, instant payments, cards, lending and investments in one place — built to bank-grade security with biometric login, device binding, real-time fraud checks and complete audit trails. Designed to pass an external security review before a single customer logged in.

1 app Accounts, cards & payments
Real-time Fraud & transaction checks
Biometric Login + device binding
Overview

A bank in the pocket, secured end to end.

A digital-first bank asked us to build their flagship customer app on top of a core banking system and a card processor. The product had to feel as fast and friendly as a consumer app while meeting the security and compliance bar of a regulated institution.

We delivered native apps with a hardened security model — biometric login, per-device binding, certificate pinning and a real-time risk engine that scores every transaction before it clears. Customers move money, freeze cards, open goal-based savings and apply for a loan without leaving the app, and every action is logged for audit.

  • Accounts, payments, cards, lending & investments
  • Biometric login, device binding & certificate pinning
  • Real-time fraud scoring with full audit logging

Consumer-grade experience on a bank-grade security and compliance foundation

MFA + biometrics Risk engine Audit trails
What We Built

Everyday banking, done properly.

The features customers touch daily — each wired to the core bank and card rails behind the scenes.

Instant Payments

Real-time transfers and bill pay with payee management, scheduled and recurring payments, and instant in-app confirmation.

Card Controls

Freeze and unfreeze cards, set channel and spend limits, manage virtual cards and view a live, categorised transaction feed.

Goal-Based Savings

Round-ups, automated saving rules and named goal pots help customers put money aside without thinking about it.

In-App Lending

Pre-qualified offers, an instant eligibility check and a paperless loan application with e-sign and same-session disbursal.

In-App KYC

Document capture, liveness check and address verification let customers onboard and raise account limits without a branch visit.

Disputes & Support

Raise a transaction dispute, track its status and reach support in-app, with secure messaging and full interaction history.

Under the Hood

Where the security lives.

The engineering that let the app clear an external penetration test and a regulator review.

Security Model

  • Biometric login with device binding and secure-enclave key storage
  • Certificate pinning and end-to-end encrypted transport
  • Step-up MFA on high-risk actions and new devices
  • Real-time fraud scoring before a transaction is authorised
  • Tamper, jailbreak and screen-capture protection

Integration & Compliance

  • Core banking and card-processor integration over secure APIs
  • Real-time payment rails with idempotent, reconciled transfers
  • Immutable audit logging of every customer and system action
  • Consent, data-retention and privacy controls built in
  • Feature flags and staged rollout for safe releases
Built With
iOS Android Kotlin Swift Java / Spring PostgreSQL Kafka OAuth 2.0

Building a banking or fintech app? Let’s talk.

From mobile banking and wallets to lending journeys, we build regulated financial products that are secure, audited and a pleasure to use.