I will payment integration specialist stripe, paypal, pix, webhooks

J
jotaerrec15
J
jotaerrec15
Javier R.

Level 1

Einige Informationen werden in englischer Sprache angezeigt.
payment integration specialist stripe, paypal, pix, webhooks
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payment integration specialist stripe, paypal, pix, webhooks
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payment integration specialist stripe, paypal, pix, webhookspayment integration specialist stripe, paypal, pix, webhookspayment integration specialist stripe, paypal, pix, webhooks

Über diesen Service

Struggling with payment integrations that just work? I specialize in production-grade payment systems for SaaS, e-commerce, and membership platforms.


As the engineer behind EngajaMaisVoce (+$1M BRL processed) and WhoIsOutlier (Stripe + AWS S3), I've implemented:

Stripe Subscriptions with HMAC webhook verification

PayPal Billing Agreements + cancellation sync

Brazilian gateways: PIX (Woovi/OpenPix), Boleto (PagHiper), Mercado Pago

Multi-gateway fallback logic + wallet/coins systems

Server-to-Server tracking for Meta CAPI (CRO-optimized)


What you get:

Secure, idempotent webhook handlers

Subscription logic (trials, coupons, proration)

Error handling + retry mechanisms

Admin panel for payment monitoring

Full source code + runbook


No more lost payments, chargebacks, or broken checkout flows. Let's make your monetization bulletproof.


Message me first to confirm your gateway and scope.

  • Expertise

    • Performance
    • Sicherheit
    • Betriebssysteme
    • Design
    • Datenbanken

  • Programmiersprache

    • TypeScript

Lerne Javier R. kennen

Javier R.

Tech Lead Fullstack Engineer

5,0(8)

Level 1

  • AusArgentinien
  • Mitglied seitDez. 2022
  • ⌀ Antwortzeit1 Stunde
  • Letzte Lieferung4 Tage

  • Sprachen

    Spanisch, Englisch
I am a self-taught programmer passionate about continuous learning. I have strong skills in JavaScript, Nodejs, React js, MongoDB, MySQL, HTML, CSS, Tailwind CSS, and I have worked with a variety of frameworks such as Express, SocketIO, and WebSocket. I have experience in IoT projects developed with Nodejs, React, Arduino, and WebSockets, showcasing skills in software, hardware, and teamwork. I have excelled in programming competitions and am excited to work on challenging, high-quality projects. https://javier-rodriguez-portfolio.pages.dev/

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