Services

Mobile app development (iOS & Android)

DevsReady builds mobile apps for iOS and Android for banks, fintech companies and enterprises: secure mobile banking front ends, field and back-office apps and companion apps for web platforms, built cross-platform in Flutter and connected to Java, Spring Boot or Quarkus backends, with secure authentication and push notifications through Firebase Cloud Messaging.

Updated

Who mobile app development is for

CTOs, heads of digital channels and product owners at banks, fintech companies, enterprises and system integrators who need an iOS and Android app on top of systems they already run, and want one partner for the app and for the backend it talks to.

Typical use cases

What DevsReady builds for iOS and Android:

  • Mobile banking front ends: Apps for bank and fintech clients on top of existing Java and Spring Boot services, with secure sign-in and push notifications.
  • Field and back-office apps: Apps for staff who approve, check or update records away from a desk, connected to the systems the company already runs.
  • Admin and operations apps: Internal apps that let a team monitor and manage a platform from a phone, with push alerts when something needs attention.
  • Companion apps for a web platform: A mobile client that shares the accounts, APIs and business rules of an existing web platform.

What we deliver in a mobile app project

  • One app for iOS and Android: A Flutter app built from one Dart codebase, so features, fixes and releases reach both platforms together.
  • Secure authentication: Sign-in against your identity provider, with tokens in secure storage and sessions that expire.
  • Push notifications: Messages sent through Firebase Cloud Messaging to iOS and Android, triggered by events in your backend.
  • Backend and APIs: Java, Spring Boot or Quarkus services and REST APIs, new or extended from yours.
  • Store release: Signed builds published to the App Store and Google Play.

Typical mobile app architecture

A mobile app stays secure and easy to change when it holds little business logic: it presents data, keeps the user signed in and calls backend services through versioned APIs.

Mobile app, APIs and backend layers

  1. Mobile app

    • iOS app
    • Android app
    • One Flutter codebase in Dart

  2. On the device

    • Secure token storage
    • Local cache
    • Biometric unlock where required

  3. API and security

    • REST APIs
    • Token-based authentication
    • API versioning

  4. Backend services

    • Java, Spring Boot or Quarkus
    • Business rules
    • Firebase Cloud Messaging

  5. Systems of record

    • Core banking, payments or ERP
    • Databases
    • Identity provider
A typical architecture. Your backend, identity provider and the systems the app reaches are mapped during discovery.

Because business rules live in the backend, a rule change ships without an app store review, and web and mobile give the same answer.

Security for banking and fintech mobile apps

On a banking or fintech app, security is designed in from the first screen. Tokens are kept in the Keychain on iOS and the Keystore on Android, never in plain preferences; sessions expire and refresh; every call goes over TLS to APIs that check each request on the server. Biometric unlock with Face ID, Touch ID or Android biometrics can be added where your security rules call for it.

DevsReady works inside the security rules, environments and processes your institution sets, and the specific controls are reviewed in your vendor assessment.

Push notifications

Push notifications go through Firebase Cloud Messaging to iOS and Android, triggered by backend events such as a payment received or an approval waiting. Sensitive data stays out of the notification text and behind sign-in in the app.

App store release and maintenance

Each build is versioned, tested and signed, then goes to testers through TestFlight and Google Play internal testing before it reaches the stores. DevsReady prepares the store listings with you and handles review feedback from Apple and Google, while the app is published under your organization's developer accounts.

After launch, DevsReady can keep the app current with new iOS and Android versions, store policy changes and new features, or hand the code and release process over to your team.

How we de-risk a mobile app project

  • Discovery: Users, journeys, backend systems and security rules mapped with you before any commitment.
  • Proof of concept: One key journey, such as sign-in and a core screen, end to end on real devices, free when you continue, in about one month from signed contract.
  • API contracts first: The API between app and backend is agreed early, so both sides are built and tested in parallel.
  • Governance and security: Statements of work under a master services agreement, an NDA before details, and work inside your security rules and environments.

Mobile technology stack

Flutter and Dart for iOS and Android, with Riverpod for state, go_router for navigation, Dio for HTTP and Firebase Cloud Messaging for push. Native Kotlin or Swift code is added only where a platform feature needs it. Backends in Java, Spring Boot and Quarkus with REST APIs, on Docker, Kubernetes or AWS.

Proof and what we publish

DevsReady builds and runs its own Flutter apps for iOS and Android: an internal admin app for its platforms and the mobile client of Markonex, DevsReady's latest project, a B2B marketplace. Both sign in against Java backends and receive push notifications through Firebase Cloud Messaging. No client mobile case study is published yet.

Visit market-connect.ai | See the banking case studies | Read the verified DevsReady reviews on Clutch

Frequently asked questions

Does DevsReady use Flutter or native development for mobile apps?

Flutter is the primary choice: one Dart codebase produces both the iOS and the Android app, so features, fixes and releases stay in step. Native Kotlin or Swift code is added only where a platform feature needs it.

Can DevsReady build the backend for our mobile app?

Yes. DevsReady builds Java, Spring Boot and Quarkus backends and REST APIs, and can build a new backend for the app or extend the one you already run.

How do you secure a mobile banking app?

With tokens in the Keychain or Keystore, expiring sessions, TLS and server-side checks on every request, and biometric unlock where your rules require it. The controls follow your institution's security rules.

Can the mobile app work offline?

Yes, where the use case allows it: the app can show the data it last loaded and queue actions until the connection returns, while the backend decides how to handle conflicts. Operations that need a live check, such as signing a payment, stay online.

Questions buyers ask

Direct answers on how an engagement starts, what drives the cost, contracts and support. Prices are quoted per project after a discovery call.

How does a mobile app project with DevsReady start?

With a discovery call about your users, your backend and your security rules, under an NDA if you need one. A free proof of concept then takes one key journey end to end on real devices in about one month from signed contract.

What does a mobile app cost?

Each project is quoted after a discovery call, because the cost depends on the screens and journeys, the backend work, the integrations, the security requirements, the engagement model and the duration. The proof of concept is free when you continue with DevsReady.

Who owns the app code and the store listings?

Code and IP ownership is written into the contract before work starts, and the usual arrangement is that you own the code built for you. The app is published under your organization's developer accounts, so the listings stay yours.

More answers on engagement models, cost, time zones, compliance and IP ownership in the nearshore FAQ.

Planning a project like this?

Tell us about your goals, your systems and your constraints. You will talk directly with the architect who would lead the work.

Book a discovery callcontact@devsready.io