Wilson Medeiros

I’m a Back-end Software Engineer with 5+ years of experience building Go microservices for fintech and e-commerce systems. I focus on payment processing, distributed systems, REST and gRPC APIs, event-driven architecture, and database-backed applications—especially in remote-first, asynchronously collaborating environments.

At Pedido Pago, I built and maintained Go microservices across a distributed service ecosystem, supporting mission-critical cart and order workflows and strengthening reliability through distributed cart locking, deadlock prevention, and self-healing event-driven order/payment flows. I also expanded the payment platform via a major gateway API migration and integrations across multiple payment providers, including webhooks, refunds, 3DS authentication, routing, and gateway failover.

I’ve implemented settlement, balance, transfer, early-settlement, and reconciliation syncing (including XLSX exports) plus an internal payment wallet with instant-payment recharge and ledger operations. I enjoy turning complex payment domain requirements into resilient systems—using queue-based status reconciliation, deadlock recovery, and risk analysis with fraud indicators and 3DS signals—and I’ve leveraged AI-assisted development (Claude Code) to accelerate delivery, review, and documentation.