Browse categories
Explore
Fiverr Pro
English
$
USD
I will integrate iap, subscriptions, ads or authentication into your application
Alison P
About this gig
I will help you monetize and secure your mobile or web application with a reliable end-to-end integration.
I specialize in the parts of application development where frontend, backend and third-party platforms must work together correctly.
Monetization integrations:
Payment gateways
Recurring subscriptions
Mobile in-app purchases
Purchase and subscription restoration
Server-side purchase validation
Webhooks and payment-status updates
Ad networks and mediation SDKs
Purchase error handling and logging
Authentication integrations:
Secure login and registration
JWT access and refresh tokens
OAuth 2.0 and social login
Token refresh and revocation
Role-based authorization
Protected frontend and backend routes
Mobile browser authentication flows
Secure session management
I work with:
React web applications
Cordova and Capacitor mobile applications
Native Android integrations
Native iOS integrations
Spring Boot, Spring Data JPA and Hibernate
FastAPI and Flask backends
REST APIs, webhooks and asynchronous services
Each package covers one application, one target platform and the agreed provider. Additional platforms, providers or services can be added through a custom offer.
Get to know Alison P
Alison P
Fullstack software engineer
- FromMauritius
- Member sinceMar 2022
Languages
English, Portuguese
I am a full-stack software engineer with over 2 years of experience developing REST APIs, event-driven backend services, and React-based applications. I have extensive experience with Java, Python, and JavaScript, building production systems for over 100,000 users and developing AI/ML applications using YOLO and LLMs.
FAQ
What counts as a revision?
A revision corrects the delivered integration against the agreed requirements. Adding providers, platforms, products, login methods or new workflows is additional work.
Can you implement both JWT and OAuth?
Yes. JWT usually manages application sessions, while OAuth connects an external identity provider. If both are required as part of one authentication flow, I will confirm the scope before the order.
Can you work on the frontend and backend?
Yes. I can connect React, Cordova or Capacitor applications to Spring Boot, FastAPI or Flask backends and implement the supporting endpoints, persistence and security flow.
Does one package include Android, iOS and web?
No. Package pricing covers one target platform. Additional platforms require an extra or custom offer because each platform has different SDK, configuration and testing requirements.
Will you handle raw card details?
No. I integrate approved payment-provider SDKs, APIs or hosted payment interfaces. Applications should not store or process raw card details unless they have the required security and compliance infrastructure.
