I will integrate apis, payment gateways, and backends to your app


About this gig
Are you looking to connect third-party services, process payments securely, or add AI capability to your app? I specialize in building robust API integrations and backend connections for web, mobile, and desktop applications.
As a Full-Stack Software Engineer, I ensure your integrations run seamlessly with clean architecture, secure handling, and complete data integrity.
What I Can Integrate & Build For You:
Payment Gateways: Stripe, PayPal, Razorpay, and custom checkout flows.
Modern APIs: RESTful APIs, GraphQL, Webhooks, and OAuth authentication.
AI & Automation: OpenAI/ChatGPT APIs, custom LLM connections, and automated workflows.
Cloud & Database: Firebase, AWS, MongoDB, and custom server-side microservices.
Why Work With Me?
Security First: Token handling, encrypted keys, and secure endpoints.
Clean Documentation: Well-commented code and easy-to-read API usage docs.
Scalable Architecture: Built to handle high traffic and low latency.
Please send me a direct message with your project requirements before placing an order to confirm the best package!
Get to know Damith Ranga
Full Stack Software Engineer Mobile, Web and Desktop
- FromSri Lanka
- Member sinceSep 2021
Languages
Sinhala, English
