You need your app to talk to something else. A payment gateway, a CRM, a GDS, an AI model, a mailing service. I've done this across dozens of projects and I know where these integrations break.

I've connected apps to Amadeus GDS for flight booking, HubSpot and Mailgun for sales automation, Stripe for payments, Langchain for unified AI APIs, and Firebase for real-time data. I know how to handle rate limits, webhook reliability, auth flows, and the weird edge cases that vendor docs don't mention.

Audit — I review your existing system and the target API. We map out the data flow, error handling, and edge cases before writing a line of code.

Build — Clean, tested integration code with proper retry logic, caching where it matters, and monitoring so you know when something breaks.

Handoff — Documented, deployed, and I stick around to make sure it holds up in production.

If your app needs to reliably talk to an external service, that's what I do.