Need to connect your mobile app with payments, authentication, maps, notifications, analytics, AI, subscriptions, or external services?

I integrate reliable APIs and third-party services into iOS and Android applications, helping startups and product teams add production-ready functionality without disrupting the existing app experience.

I work with Flutter, Firebase, Supabase, Node.js, REST APIs, SDKs, webhooks, and custom backend logic to connect mobile apps with external platforms securely and efficiently.

My focus is not only on making an integration work, but on handling authentication, error states, loading flows, data synchronization, security, edge cases, and production reliability so the feature behaves correctly in real-world use.

API Integration Connect your mobile app with REST APIs, backend services, SaaS platforms, external databases, or custom endpoints.

Payment & Subscription Integration Integrate payment gateways, in-app purchases, subscription flows, checkout experiences, transaction handling, and payment status updates based on your product requirements.

Authentication & Social Login Implement secure login and account flows using email, phone, OTP, Google, Apple, social providers, Firebase Auth, Supabase Auth, or custom authentication APIs.

Maps & Location Services Integrate maps, geolocation, address search, routing, location permissions, nearby results, and other location-based functionality.

Push Notifications Set up push notifications, device token handling, notification permissions, deep links, and backend-triggered notification workflows.

Analytics & Tracking Integrate analytics, event tracking, crash reporting, conversion tracking, and product usage monitoring to help you understand how users interact with your app.

AI API Integrations Connect AI services for chat, assistants, content generation, summarization, recommendations, intelligent search, data extraction, automation, and other AI-powered workflows.

Web3 & Crypto Integrations Integrate blockchain APIs, wallet connections, transaction data, token information, crypto services, Web3 SDKs, and other blockchain-related functionality where required.

Third-Party SDK Integration Implement mobile SDKs for payments, analytics, identity verification, communication, cloud services, customer support, marketing tools, and other external platforms.

Custom Backend & Webhook Logic Build supporting backend logic using Node.js, Firebase, Supabase, or serverless functions when an integration requires secure server-side processing, webhooks, token management, or business logic.

Testing & Error Handling Test integrations across important success, loading, failure, timeout, permission, authentication, and connectivity scenarios to ensure reliable behavior.

1. Review Understand your existing app, required integration, API documentation, expected user flow, and technical constraints.

2. Plan Define the required endpoints, authentication method, SDK setup, backend requirements, data flow, and edge cases.

3. Integrate Implement the service cleanly within your existing mobile architecture.

4. Test Validate API responses, permissions, authentication, error handling, loading states, and real-device behavior.

5. Refine Fix integration issues and ensure the feature fits smoothly into the existing application experience.

6. Deliver Provide the completed integration, source-code changes, configuration guidance, and any relevant setup notes.

Startup MVPs that need third-party functionality

Existing mobile apps adding new integrations

Flutter applications connecting to external APIs

Products adding payments or subscriptions

Apps requiring Google or Apple login

Location-based and delivery applications

Apps adding push notifications or analytics

AI-powered mobile products

Crypto and Web3 applications

Teams with an existing backend or API

Apps replacing outdated or unreliable integrations

Depending on your project, I can help with:

REST APIs

Firebase

Supabase

Stripe and payment services

In-app purchases

Subscription systems

Google Sign-In

Sign in with Apple

OTP and phone authentication

Google Maps and location APIs

Push notifications

Firebase Cloud Messaging

Analytics and crash reporting

AI and LLM APIs

Email and SMS providers

Cloud storage

File upload services

CRM and business platforms

Webhooks

Web3 and blockchain APIs

Wallet integrations

Custom backend services

Depending on the agreed scope, you can receive:

Completed API or SDK integration

Mobile frontend implementation

Authentication and token handling

Backend or serverless integration logic

API models and data mapping

Loading and error states

Secure configuration setup

Webhook handling

Deep linking where required

Integration testing

Bug fixes related to the implemented feature

Source-code updates

Setup and configuration documentation

Please share your existing app or codebase, API or SDK documentation, required integration, expected user flow, test credentials or sandbox access if available, and any backend details related to the feature.

If the integration is currently broken or partially implemented, you can also share the existing code, error details, screenshots, or logs so I can review the current setup.