I will integrate any third party api into your app or website

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aoliveira23
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aoliveira23
Alejandro O

About this gig

Most API integrations break in production, not in the demo. The happy path works, then a token expires, a rate limit hits, a webhook fires twice, and now your data is wrong and nobody knows why.


I'm Alex, a full-stack engineer who builds and runs live multi-tenant SaaS solo, front to back. I've wired Stripe payments, Twilio messaging, Supabase, and custom webhook flows into real production systems that paying clients depend on every day. I know where integrations fail and how to build them so they hold.


What I do: connect your app or website to any third party API. Payments, CRMs, messaging, AI models, data providers, whatever you need talking to your stack. Auth handled properly, errors caught, retries where they matter, and the data landing where it should.


Where a REST call isn't enough I build the backend around it: webhooks, background jobs, database sync, a clean endpoint your frontend can actually use.


You get tested, documented code you own, plus notes on what runs and why.


Tell me the API and what you need it to do. I'll tell you exactly how I'd build it and what it takes.


Get to know Alejandro O

Alejandro O

FullStack Engineer

  • FromUnited States
  • Member sinceJul 2026
  • Languages

    English, Spanish
I am a full-stack engineer who builds and operates complete production SaaS solo, from front to back. I specialize in multi-tenant architecture, Next.js, and Supabase/PostgreSQL, shipping live platforms trusted by institutional clients. My dual master's background in business analytics allows me to bring a unique product and data lens to every technical build I undertake.

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