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

J
jotaerrec15
J
jotaerrec15
Javier R.

Level 1

Sommige informatie wordt in het Engels weergegeven.
payment integration specialist stripe, paypal, pix, webhooks
Volledig scherm
payment integration specialist stripe, paypal, pix, webhooks
Volledig scherm
Volledig scherm
payment integration specialist stripe, paypal, pix, webhookspayment integration specialist stripe, paypal, pix, webhookspayment integration specialist stripe, paypal, pix, webhooks

Over deze dienst

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

    • Prestaties
    • Beveiliging
    • Besturingssysteem
    • Design
    • Databases

  • Programmeertaal

    • TypeScript

Maak kennis met Javier R.

Javier R.

Tech Lead Fullstack Engineer

5,0(8)

Level 1

  • Afkomstig uitArgentinië
  • Lid sindsdec 2022
  • Gem. reactietijd1 uur
  • Laatste levering5 dagen geleden

  • Talen

    Spaans, Engels
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/

Mijn portfolio

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