Matheus M

I’m a Senior Software Engineer specializing in full-stack TypeScript products, with 6+ years building production web applications that ship reliably. I focus on core stack delivery—Next.js, React, and TailwindCSS on the frontend; Node.js, NestJS, and PostgreSQL on the backend—while staying close to POs, PMs, and clients to keep the product on track and avoid re-work.

Most recently, I contributed to two AI-related Next.js projects for a Frontier Labs client through G2i, delivering both products on time in a high-paced environment. I shipped 3+ production PRs per day on average using an AI-augmented workflow (Claude Code with subagent orchestration and MCP integration, plus automated PR review subagents).

Previously at LW Tecnologia, I co-architected and shipped lwauto.com.br, a B2B vehicle marketplace cataloging 4,000+ listings. I built the public B2B API with NestJS, Prisma, and MariaDB (including key-pair authentication middleware and admin-side rotation), implemented real-time wallet synchronization with SSE, diagnosed a production photo rotation issue by fixing stripped EXIF orientation handling, and supported production stability with Elastic APM and AWS CloudWatch while mentoring a junior developer.

Earlier, at Golive Consultoria, I cut latency on a critical employee-hours endpoint from ~20s to under 3s (~85% reduction) by replacing Node-side aggregation with a native MongoDB aggregation pipeline. I also designed three ERP-integrated applications connecting SAP HANA to React/Next.js interfaces with multi-tenant data isolation, built a reusable React + TailwindCSS component library that powered white-label platforms, and implemented CI/CD pipelines across GitHub Actions, GitLab CI/CD, Firebase, and Heroku—alongside code reviews and JavaScript workshops.