Backend Integration & API Connection by Angel J.Backend Integration & API Connection by Angel J.
Backend Integration & API ConnectionAngel J.
Cover image for Backend Integration & API Connection
Your frontend is ready but it's not talking to anything? I'll connect your website or app to any backend service, third-party API, or database — so your product actually works end to end.
What's included:
REST API design, build, and connection to your frontend
Third-party API integrations (Stripe, OpenAI, Twilio, Pipedrive, etc.)
Authentication setup (JWT, OAuth, session-based)
Database connection and query optimization (PostgreSQL, Supabase, Firebase)
Webhook setup and event handling
Error handling, logging, and basic security practices
Full source code delivered on handoff
Who is this for: Developers or founders who have a frontend — in Framer, React, or any other stack — and need someone to wire up the backend logic, data, and third-party services that make it functional.
Delivery: 3–7 business days depending on integration complexity.
FAQs

Contact for pricing
Duration1 week
Tags
JavaScript
Next.js
Node.js
React
TypeScript
Backend Engineer
Frontend Engineer
Fullstack Engineer
Web Developer
Service provided by
Angel J. proMadrid, Spain
Backend Integration & API ConnectionAngel J.
Contact for pricing
Duration1 week
Tags
JavaScript
Next.js
Node.js
React
TypeScript
Backend Engineer
Frontend Engineer
Fullstack Engineer
Web Developer
Cover image for Backend Integration & API Connection
Your frontend is ready but it's not talking to anything? I'll connect your website or app to any backend service, third-party API, or database — so your product actually works end to end.
What's included:
REST API design, build, and connection to your frontend
Third-party API integrations (Stripe, OpenAI, Twilio, Pipedrive, etc.)
Authentication setup (JWT, OAuth, session-based)
Database connection and query optimization (PostgreSQL, Supabase, Firebase)
Webhook setup and event handling
Error handling, logging, and basic security practices
Full source code delivered on handoff
Who is this for: Developers or founders who have a frontend — in Framer, React, or any other stack — and need someone to wire up the backend logic, data, and third-party services that make it functional.
Delivery: 3–7 business days depending on integration complexity.
FAQs

Contact for pricing