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Fiverr Pro
English
$
USD
I will build your fastapi or ktor backend for payments, pos, or saas systems
Jean Pierre I
About this gig
I build backend systems that handle real money and real transaction volume payment verification, POS reconciliation, voucher systems, and multi-tenant SaaS APIs used by companies across multiple countries. If your backend needs to get auth, data integrity, or transaction logic right the first time, that's exactly what I do daily.
For simpler needs, I also build clean single-endpoint or small API projects fast.
What I offer:
- RESTful APIs (GET/POST/PUT/DELETE)
- PostgreSQL / MySQL integration
- Authentication (JWT, OAuth2) & role-based access
- Multi-tenant architecture
- Swagger / OpenAPI documentation
- Docker-ready, optional deployment support
For very large/enterprise-scale backends (20+ endpoints), message me first for a custom quote.
Get to know Jean Pierre I
Jean Pierre I
- FromSouth Africa
- Member sinceJul 2025
Languages
English, French
I'm a software engineer specializing in mobile and frontend development. I build Android apps using Kotlin + Compose, iOS apps with SwiftUI, and cross-platform solutions with React Native or Kotlin Multiplatform. On the web, I work with Angular, React, and PWAs. For backend, I use FastAPI, Ktor, or Laravel, with PostgreSQL/MySQL. While these are my preferred tools, I'm adaptable to project needs and always focused on delivering clean, scalable, and reliable solutions.
Other Software Development Services I Offer
FAQ
Can you integrate this API with a frontend or mobile app?
Yes! I tailor the API to support web or mobile apps and ensure smooth integration.
Can you deploy the backend?
Yes — I can deploy to numerous platforms, or provide Docker setup for easy deployment.
Which databases do you support?
PostgreSQL and MySQL primarily, but SQLite or others are possible depending on your needs.
Will the API include documentation?
Yes — all endpoints come with Swagger/OpenAPI docs for easy understanding and testing.
Can you handle authentication and security?
Yes — Premium includes JWT, CORS policies, rate limiting, and secure coding practices.
How can I test the API you build?
I provide guidance to set up a Postman project with all endpoints included, so you can easily test requests, responses, and workflows for multiple endpoints.
Can you build very large backends?
Yes, but those require a custom offer. Premium covers up to 8–10 endpoints.
