Aboutme

Building for the web, end to end.

Hi, I'm Marco! I'm a Fullstack Software Engineer with 6+ years of experience building scalable, high-performance web applications with TypeScript, React and Node.js. I've worked across small SaaS startups, enterprise projects and high-traffic e-commerce, and I enjoy engaging in the whole product lifecycle, from the first prototype to launch.

Lately, I'm specializing in Agentic Engineering and AI Coding thorugh harnesses like Claude Code, and building AI-powered applications through LLM APIs like Claude.

Holding a Bachelor's Degree in Computer Engineering, I learned through a mixture of hands-on coding and a strong STEM foundation that still shapes how I work. I strongly believe that the strongest lever in software development lies in the structured application of engineering practices, processes and principles, and I strive to apply them in every project I work on.

• 6+ years building web apps, from startup SaaS to US e-commerce
• Fully remote and async, working with teams across time zones
• TypeScript, React and Node.js at the core, with experience in Vue React Native
• Serverless with Firebase, and some PostgreSQL for relational data
• Web performance, Core Web Vitals, SEO, and Accessibility best practices
• Agentic Engineering and AI Coding with Claude Code, Agent Skills, and MCPs

• 6+Years of experience
• 2+Years of AI-assisted code
• US + BRRemote teams across time zones

Tech stack

Experience

1. 2025 – now

   Fullstack Engineer · Form Factory

   Headless e-commerce · US brands

   What I do

   • Building headless storefronts and maintaining features for leading US brands
   • Working as a forward deployed engineer, reporting to the merchant staff
   • Planning around seasonal demand: ship, validate, harden, discover

   Impact

   • Led a performance program that took Lighthouse and Core Web Vitals from poor to production standards
   • Rebuilt the Customer Hub for a major clothing brand: loyalty provider, account, orders and support
   • Rebuilt the Product Detail Page for that same brand: optimized markup and components, media assets, raised Add-to-Cart perceived speed, pushed Lighhouse scores by 20+ points
   • TypeScript
   • React
   • Remix / RR7
   • Shopify Hydrogen
   • Performance / CWV
   • SEO
2. 2020 – 2025

   Fullstack Engineer · EasyRetro

   SaaS · Fully remote and async

   What I do

   • End-to-end product work across EasyRetro, Slideasy and PlanITPoker, from feature planning to release
   • Wearing many hats: discovery, prototyping, implementation, analytics, SEO and some customer support

   Impact

   • Built Slideasy from scratch up to its MVP launch
   • Led the migration of PlanITPoker to a new stack while it moved from free to paid
   • JavaScript
   • Vue
   • Nuxt
   • Node.js
   • Firebase
   • FLUX
   • Stable Diffusion
   • Open AI APIs
3. 2020

   Freelance Developer · Satélite Norte

   Audit platform · Freelance

   What I do

   • Client meetings, requirements, prototypes, UI/UX, planning and implementation
   • Built three web apps for auditing transportation agencies, with a React/React Native frontend and Node.js backend

   Impact

   • The software is being used to audit hundreds of agencies, providing centralized insights, planning and requests
   • React
   • React Native
   • Node.js
   • PostgreSQL
4. 2019

   IT Intern · Rio de Janeiro State University

   Disaster prevention · Mobile app

   What I do

   • Developed a climate-monitoring mobile app with Ionic and its Java REST API
   • Scalable monitoring network with weather stations and sensors

   Impact

   • Published the app on the Google Play Store
   • Earned a project registration certificate
   • Ionic
   • Angular
   • Java
   • Java EE
   • Java Beans
   • REST API

Academic projects

1. 2017 – 2020

   Junior Project Manager & Engineer · Serra Jr. Engenharia

   I joined our university junior company, where, under the mentorship of experienced staff and Ph.D. professors, I managed backlogs, gathered client requirements and led the delivery of web applications using Angular, PHP and JavaScript. It was also where I designed an industrial IoT solution with Arduino and C++ to automate temperature control in production, the first time my love for electronics could be put to use.

Education

1. 2016 – 2021

   B.Sc. in Computer Engineering · Rio de Janeiro State University (UERJ)

   The basic engineering cycle gave me a really strong STEM foundation, with calculus, physics, differential equations, numerical simulation and linear algebra. The computer science cycle then covered algorithms, data structures, computer architecture, databases, networks and state machines, plus machine learning concepts like regression models, perceptrons, neural networks and techniques such as SVD, QR decomposition and PCA. Constant exchange with students and Ph.D. researchers, and meetups ranging from sociophysics to black holes, made it an even richer experience.

2. 2014

   Technical course in Programming · ETEC, São Paulo

   One of the leading technical schools in Brazil. I trained as a Programming Assistant and learned the basics of system analysis, SQL databases, web development with JavaScript and PHP, and desktop software with Java and C#. The coursework was demanding, with 6-month modules, patience and overnight debugging, and it sealed my decision to join IT.

Through this blog, I share what I learn along the way. Want to chat?Get in touch or read thefull story.