// API integrations · Mobile apps

We connect your systems and put them in your customers' pockets.

Devostria is an independent development studio building reliable API integrations and native-quality mobile apps for growing businesses.

RESTGraphQLWebhooksiOSAndroidFlutterReact Native
What we do

Two specialties, done properly.

We focus on the work that holds modern businesses together: getting software to talk to other software, and getting it into people's hands.

API Integrations

Connect your CRM, payments, accounting, inventory and in-house tools so data flows automatically, no more copy-paste between systems. We build integrations that handle errors, retries, rate limits and authentication the right way.

Typical work

  • Third-party API integration
  • Custom REST & GraphQL APIs
  • Webhooks & event pipelines
  • OAuth 2.0 / SSO
  • Payment gateways
  • ERP / CRM sync
  • Legacy system bridges

Mobile App Development

From first idea to App Store and Google Play. We design and build fast, polished iOS and Android apps, native or cross-platform, wired up to the backend and APIs that power your business.

Typical work

  • iOS (Swift)
  • Android (Kotlin)
  • Flutter
  • React Native
  • UI/UX design
  • Push notifications
  • Offline sync
  • App Store launch

Backend & Cloud

Scalable backends, databases and cloud infrastructure for your apps and integrations, set up with monitoring and sensible security from day one.

Support & Maintenance

APIs change and OS versions move on. We keep your integrations and apps updated, monitored and working long after launch.

Integrations

Platforms we connect

A sample of the services we integrate with. If it has an API, we can work with it.

StripePayPalSquareShopifyWooCommerceQuickBooksXero SalesforceHubSpotTwilioGoogle APIsMicrosoft 365FirebaseAWS
How we work

A clear process, no surprises.

Discover

We learn your goals, map your systems and define exactly what success looks like.

Design

Architecture, data flows and app screens, agreed with you before any code is written.

Build & test

Short iterations with regular demos, automated tests and transparent progress updates.

Launch & support

Deployment, app store release, documentation and ongoing maintenance.

Why Devostria

An independent studio that treats your project like its own.

You work directly with the developers building your product. No account-manager layers, no hand-offs, no lock-in.

Talk to a developer

Built to last

Clean, documented code with proper error handling and logging, so integrations don't silently break.

Security first

Encrypted credentials, least-privilege access and secure authentication across every project.

You own everything

Full source code, credentials and documentation are handed over to you.

Straight communication

Clear estimates, regular updates and honest advice, including when something isn't worth building.

Get in touch

Let's build something that works.

Tell us about your project. We'll reply within one business day with next steps.

Have systems that don't talk to each other, or an app idea on the shelf?

Book a free consultation