Looking for a job

Matheus Ferreira

@matheusferreira

Message

I build resilient multi-tenant e-commerce integrations with NestJS, TypeScript, and event-driven architecture.

Brazil

Message

What I'm looking for

I'm looking to build resilient backend systems and integrations for e-commerce, ERP, WMS, or SaaS products, with opportunities to work on multi-tenant architecture, event-driven workflows, and the full order lifecycle.

At Selia Fullcommerce, I build and evolve multi-tenant NestJS and TypeScript services that keep orders, invoices, stock, and shipping statuses synchronized between e-commerce platforms, ERPs, and WMSs.

I've implemented end-to-end order lifecycle flows—from capture and payment approval to invoicing, dispatch, tracking, cancellations, and returns—using Kafka, AWS SQS, and SNS to increase resilience by 40%. I also built a secure Keycloak-backed admin backend and AI-powered automation with n8n.

In my personal project, agenticOS, I built a multi-tenant knowledge platform with PostgreSQL, pgvector, Docker, tenant isolation, SQL-enforced authorization, ingestion pipelines, and RAG search.

Experience

Work history, roles, and key accomplishments

Current

Backend Software Engineer (Mid-level)

Current

Selia Fullcommerce

Sep 2023 - Present (3 years)

Built and evolved multi-tenant NestJS/TypeScript integration services connecting e-commerce platforms to ERPs and WMSs, keeping orders, invoices, stock, and shipping status in sync. Implemented order lifecycle flows end to end with idempotency, retries, and reconciliation, and developed asynchronous jobs and event-driven workflows using Kafka, AWS SQS, and SNS.