Hi, I'm Matheus

I help teams to build software by bridging Product, Design and Engineering.

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I enjoy building software products in small, iterative cycles with clear quality gates. I work mostly with React, TypeScript, Node.js and Swift for iOS apps. For backend work, Python with PostgreSQL and Docker.

Lately, I've been exploring Rust and ratatui for building small and performant terminal-based apps. Always learning and experimenting.

Work Experience

Jan 2021 - Present

Senior Software Engineer

Fidel API

Launched a Reimbursement API in the US market, helping land Google as a customer.
Delivered and tested critical features while stabilizing backend services under tight deadlines, avoiding customer-impacting outages during key deployment windows.
Transitioned to the Web3 team to build a loyalty commerce experience for partner brands using decentralized technologies.

Node.jsAWSSystem DesignProduct Engineering

Jan 2019 - Dec 2020

Software Engineer

Finetune (A Prometric Company)

Built norming and calibration modules that improved grading consistency and educator trust.
Scaled core platform functionality for thousands of concurrent K–12 users across the U.S., maintaining reliable performance during peak usage.
Led frontend architecture refactors that improved maintainability and onboarding for new developers.

PythonAWSFrontend ArchitectureScaling

Jan 2017 - Dec 2018

Frontend Engineer

Vibe Tecnologia

Delivered a new web app experience for a private bank client in Brazil using Angular 7 and TypeScript.
Shipped an experience that delighted the bank's customers and strengthened client satisfaction.

AngularJSTypeScriptUI/UX

2015 - 2018

Co-founder & Software Developer

Castle Dev

Provided web development and social media management services for small businesses building their digital presence, helping them reach broader audiences and deliver better products and services.

ReactCSSJavaScriptNode.jsSQLHeroku

Jun 2013 - Jun 2014

Software Developer Internship

Equilibrium Web

Built early web projects while learning the fundamentals of HTML5, CSS, and JavaScript.
Established a strong foundation in software development that shaped my engineering career.

HTML5CSSJavaScript

Featured Projects

L0ad

🏋 L0ad is a simple toolkit for Load Testing HTTP servers.

Shell

busq

🖵 A small, fast and minimal system monitor readout that renders only essential sysinfo.

RustShellRuby

scheduler-server

A scheduler server built with Node.js, TypeScript using DDD and Clean Architecture principles.

TypeScriptJavaScriptHandlebarsShell

mbtop

🗠 A tiny, minimal system monitor built to rendered as small herdr/tmux dashboard panes.

Rust

envelope

:incoming_envelope: Mail sending microservice built with Express.js, Docker and MongoDB

JavaScriptDockerfile

dotfiles

My shell and application configuration files, managed with GNU Stow.

Shell

Writing

February 22, 2026

Stop Engineering Your Prompts and Just Talk to the Thing

Most developers overcomplicate their AI coding workflow with elaborate setups and prompt rituals. The agents are good now. The bottleneck is you.

February 21, 2026

AI Is the Best and Worst Thing to Happen to Junior Engineers

Junior engineers ship faster than any generation before them. They also skip the struggle that builds intuition. That tradeoff is going to cost us.

September 15, 2025

Self-Hosting n8n, Supabase, and My Entire Automation Stack on a Hetzner VPS

A walkthrough of how I provisioned a Hetzner VPS with Terraform, deployed Dokploy, and self-hosted my entire automation infrastructure for the cost of a coffee per month.

July 22, 2025

Building LLM APIs in 2025: What Nobody Tells You

The unglamorous realities of building production APIs around Large Language Models. Latency, cost, context windows, and why streaming isn't optional.

April 5, 2025

I Automated My Social Media Content Pipeline with n8n and LLMs

How I built a workflow that fetches news, generates social media posts with an LLM, and schedules them automatically. My content robot works harder than I do.

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