Open to opportunities

Nathan Viera

@nathanviera

Message

I build payment infrastructure and cross-border transaction systems for LATAM markets.

Brazil

Message

What I'm looking for

I'm open to remote work where I can build and lead reliable payment, cross-border, and backend systems end to end, from architecture and integrations through production operations.

I've built LatamPago from zero into a cross-border payment gateway processing roughly US$1M per month across 10+ active LATAM markets. As founding engineer and CTO, I designed its PHP/Laravel architecture, payment integrations, multi-currency flows, settlement, and international payouts.

At Mundpay, I build and maintain production services for card and PIX payments, deposits, payouts, balances, refunds, chargebacks, reconciliation, and multi-currency transactions. I own changes end to end, from API and data-model design through asynchronous processing, deployment, production debugging, and provider-failure handling.

I've also led backend work for international e-commerce fulfillment at TB3 Express and delivered 20+ interactive software projects for Coca-Cola, Shell, Flamengo, and Zeiss through Be Interactive. I enjoy staying hands-on while leading architecture, integrations, code review, and reliable production delivery.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer, Backend & Payments

Current

Mundpay

Jan 2023 - Present (3 years 7 months)

Develop and maintain production payment services in PHP/Laravel backed by PostgreSQL, Redis and asynchronous job processing with Laravel Horizon. Design and evolve transaction flows covering card payments, PIX, deposits, payouts, balances, refunds and chargebacks across the full transaction lifecycle.

PHP Laravel PostgreSQL Redis Laravel Horizon REST APIs Webhooks Card Payment Deposits Payouts Balance Refunds Chargebacks

Current

Software Engineer / Technical Lead

Current

Be Interactive

Jan 2019 - Present (7 years 7 months)

Developed backend, full-stack and realtime software supporting interactive applications and large-scale digital experiences. Delivered 20+ commercial software projects for clients including Coca-Cola, Shell, Flamengo and Zeiss, from architecture through on-site delivery under fixed event deadlines.

PHP JavaScript C#Python SQL REST APIs Unity AR VR Docker Linux Nginx Git

Founding Engineer & CTO

LatamPago

Jan 2025 - Dec 2026 (1 year 11 months)

Founded and built the technology for a LATAM cross-border payment gateway from zero, processing approximately US$1M per month across 10+ active countries. Designed and implemented the platform in PHP/Laravel, owning architecture, relational data model, RESTAPIs, asynchronous processing and infrastructure.

PHP Laravel REST APIs PostgreSQL Redis Payment Orchestration Cross Border Payments FX Docker Linux Nginx Git

CTO / Backend Engineer

TB3 Express / TB3 Pharmaceutical LLC

Jan 2024 - Dec 2026 (2 years 11 months)

Led backend engineering for an international e-commerce and fulfillment operation while remaining directly responsible for implementation. Built and maintained backend services with Node.js, Strapi v5 and MySQL, exposing RESTAPIs consumed by internal tools and partner platforms.